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Dr Andreas Koch

Formerly at Lancaster University

  1. Published

    A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules: metallicity, velocities, and a clean list of RGB members

    Adén, D., Feltzing, S., Koch, A., Wilkinson, M. I., Grebel, E. K., Lundström, I., Gilmore, G. F., Zucker, D. B., Belokurov, V., Evans, N. W. & Faria, D., 27/08/2009, In: Astronomy and Astrophysics. 506, 3, p. 1147-1168 22 p.

    Research output: Contribution to journalJournal articlepeer-review

  2. Published

    A new low mass for the Hercules dSph: the end of a common mass scale for the dwarfs?

    Adén, D., Wilkinson, M. I., Read, J. I., Feltzing, S., Koch, A., Gilmore, G. F., Grebel, E. K. & Lundström, I., 4/11/2009, In: Astrophysical Journal Letters. 706, 1, p. L150-L154 5 p.

    Research output: Contribution to journalJournal articlepeer-review

  3. Published

    A new, smaller size for the low-surface brightness galaxy VCC 1661 in the Virgo Cluster

    Black, C. S., Koch, A., Rich, R. M., Longstaff, F. A., Collins, M. L. M., Lisker, T. & Janz, J., 2013, In: Bulletin of the American Astronomical Society. 221, 436.01.

    Research output: Contribution to journalMeeting abstract

  4. Published

    TOPoS: on the bimodality of carbon abundance in CEMP stars Implications on the early chemical evolution of galaxies

    Bonifacio, P., Caffau, E., Spite, M., Limongi, M., Chieffi, A., Klessen, R. S., Francois, P., Molaro, P., Ludwig, H-G., Zaggia, S., Spite, F., Plez, B., Cayrel, R., Christlieb, N., Clark, P. C., Glover, S. C. O., Hammer, F., Koch, A., Monaco, L., Sbordone, L. & 1 others, Steffen, M., 07/2015, In: Astronomy and Astrophysics. 579, 20 p., A28.

    Research output: Contribution to journalJournal articlepeer-review

  5. Published

    The extended star formation history of the Andromeda spheroid at 35 kpc on the minor axis

    Brown, T. M., Beaton, R., Chiba, M., Ferguson, H. C., Gilbert, K. M., Guhathakurta, P., Iye, M., Kalirai, J. S., Koch, A., Komiyama, Y., Majewski, S. R., Reitzel, D. B., Renzini, A., Rich, R. M., Smith, E., Sweigart, A. V. & Tanaka, M., 1/10/2008, In: Astrophysical Journal Letters. 685, 2, p. L121-L124 4 p.

    Research output: Contribution to journalJournal articlepeer-review

  6. Published

    TOPoS: III. An ultra iron-poor CEMP multiple system

    Caffau, E., Bonifacio, P., Spite, M., Spite, F., Monaco, L., Sbordone, L., Francois, P., Gallagher, A., Plez, B., Zaggia, S., Ludwig, H-G., Cayrel, R., Koch, A., Steffen, M., Salvadori, S., Klessen, R. S., Glover, S. & Christlieb, N., 11/2016, In: Astronomy and Astrophysics. 595, 6 p., L6.

    Research output: Contribution to journalJournal articlepeer-review

  7. Published

    TOPoS: I. Survey design and analysis of the first sample

    Caffau, E., Bonifacio, P., Sbordone, L., Francois, P., Monaco, L., Spite, M., Plez, B., Cayrel, R., Christlieb, N., Clark, P., Glover, S., Klessen, R., Koch, A., Ludwig, H. -G., Spite, F., Steffen, M. & Zaggia, S., 6/12/2013, In: Astronomy and Astrophysics. 560, 9 p., A71.

    Research output: Contribution to journalJournal articlepeer-review

  8. Published

    Velocity and abundance precisions for future high-resolution spectroscopic surveys: a study for 4MOST

    Caffau, E., Koch, A., Sbordone, L., Sartoretti, P., Hansen, C. J., Royer, F., Leclerc, N., Bonifacio, P., Christlieb, N., Ludwig, H. G., Grebel, E. K., Jong, R. S. D., Chiappini, C., Walcher, J., Mignot, S., Feltzing, S., Cohen, M., Minchev, I., Helmi, A., Piffl, T. & 2 others, Depagne, E. & Schnurr, O., 1/03/2013, In: Astronomical Notes / Astronomische Nachrichten. 334, 3, p. 197-216 20 p.

    Research output: Contribution to journalJournal articlepeer-review

  9. Published

    The kinematic footprints of five stellar streams in Andromeda's halo

    Chapman, S. C., Ibata, R. A., Irwin, M., Koch, A., Letarte, B., Martin, N., Collins, M., Lewis, G. F., McConnachie, A., Peñarrubia, J., Rich, R. M., Trethewey, D., Ferguson, A., Huxor, A. & Tanvir, N., 11/11/2008, In: Monthly Notices of the Royal Astronomical Society. 390, 4, p. 1437-1452 16 p.

    Research output: Contribution to journalJournal articlepeer-review

  10. Published

    A wide-field view of Leo II: a structural analysis using the Sloan Digital Sky Survey

    Coleman, M. G., Jordi, K., Rix, H-W., Grebel, E. K. & Koch, A., 1/10/2007, In: The Astronomical Journal. 134, 5, p. 1938-1951 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  11. Published

    The masses of local group dwarf spheroidal galaxies: the death of the universal mass profile

    Collins, M. L. M., Chapman, S. C., Rich, R. M., Ibata, R. A., Martin, N. F., Irwin, M. J., Bate, N. F., Lewis, G. F., Peñarrubia, J., Arimoto, N., Casey, C. M., Ferguson, A. M. N., Koch, A., McConnachie, A. W. & Tanvir, N., 6/02/2014, In: The Astrophysical Journal. 783, 1, 14 p., 7.

    Research output: Contribution to journalJournal articlepeer-review

  12. Published

    A kinematic study of the Andromeda dwarf spheroidal system

    Collins, M. L. M., Chapman, S. C., Rich, R. M., Ibata, R. A., Martin, N. F., Irwin, M. J., Bate, N. F., Lewis, G. F., Peñarrubia, J., Arimoto, N., Casey, C. M., Ferguson, A. M. N., Koch, A., McConnachie, A. W. & Tanvir, N., 26/04/2013, In: The Astrophysical Journal. 768, 2, 36 p., 172.

    Research output: Contribution to journalJournal articlepeer-review

  13. Published

    The kinematic identification of a thick stellar disc in M31

    Collins, M. L. M., Chapman, S. C., Ibata, R. A., Irwin, M. J., Rich, R. M., Ferguson, A. M. N., Lewis, G. F., Tanvir, N. & Koch, A., 21/05/2011, In: Monthly Notices of the Royal Astronomical Society. 413, 3, p. 1548-1568 21 p.

    Research output: Contribution to journalJournal articlepeer-review

  14. Published

    A close look at the Centaurus A group of galaxies: I. Metallicity distribution functions and population gradients in early-type dwarfs

    Crnojevic, D., Grebel, E. K. & Koch, A., 07/2010, In: Astronomy and Astrophysics. 516, 17 p., A85.

    Research output: Contribution to journalJournal articlepeer-review

  15. Published

    Galaxy evolution through resolved stellar populations in the nearby Centaurus A group

    Crnojevic, D., Grebel, E. K., Ferguson, A. M. N., Koch, A., Rejkuba, M., Da Costa, G., Jerjen, H., Irwin, M. J., Bernard, E. J., Arimoto, N., Jablonka, P. & Kobayashi, C., 2015, In: Memorie della Societa Astronomica Italiana. 86, p. 302-305 4 p.

    Research output: Contribution to journalJournal article

  16. Published

    How unique is the Local Group? A comparison to the nearby Centaurus A group

    Crnojevic, D., Grebel, E. K., Ferguson, A. M. N., Cole, A. A., Koch, A., Rejkuba, M., Da Costa, G. & Jerjen, H., 2011.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paper

  17. Published

    Dwarf galaxies beyond Our doorstep: the Centaurus Group

    Crnojevic, D., Grebel, E. K., Cole, A. A., Koch, A., Rejkuba, M., Costa, G. D. & Jerjen, H., 2011, In: EAS Publications Series. 48, p. 51-57 7 p.

    Research output: Contribution to journalJournal article

  18. Published

    Evolution of dwarf galaxies in the Centaurus A group

    Crnojevic, D., Grebel, E. K. & Koch, A., 4/11/2009, In: Astronomical Notes / Astronomische Nachrichten. 330, 9-10, p. 1001-1003 3 p.

    Research output: Contribution to journalJournal articlepeer-review

  19. Published

    A constant dark matter halo surface density in galaxies

    Donato, F., Gentile, G., Salucci, P., Martins, C. F., Wilkinson, M. I., Gilmore, G., Grebel, E. K., Koch, A. & Wyse, R., 11/08/2009, In: Monthly Notices of the Royal Astronomical Society. 397, 3, p. 1169-1176 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  20. Published

    Strömgren uvby photometry of the peculiar globular cluster NGC 2419

    Frank, M. J., Koch, A., Feltzing, S., Kacharov, N., Wilkinson, M. I. & Irwin, M., 09/2015, In: Astronomy and Astrophysics. 581, 15 p., A72.

    Research output: Contribution to journalJournal articlepeer-review

  21. Published

    The observed properties of dark matter on small spatial scales

    Gilmore, G., Wilkinson, M. I., Wyse, R. F. G., Kleyna, J., Koch, A., Wyn Evans, N. & Grebel, E. K., 10/07/2007, In: The Astrophysical Journal. 663, 2, p. 948-959 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  22. Published

    What Is a galaxy? How cold Is cold dark matter? Recent progress in near field cosmology

    Gilmore, G., Zucker, D. B., Wilkinson, M., Wyse, R. F. G., Belokurov, V., Kleyna, J., Koch, A., Evans, N. W. & Grebel, E. K., 2008, Panoramic Views of Galaxy Formation and Evolution. Kodama, T., Yamada, T. & Aoki, K. (eds.). p. 453-456 4 p. (ASP Conference Series; vol. 399).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  23. Published

    Observed properties of dark matter: dynamical studies of dSph galaxies

    Gilmore, G., Wilkinson, M., Kleyna, J., Koch, A., Evans, N. W., Wyse, R. F. G. & Grebel, E. K., 2007, In: Nuclear Physics B - Proceedings Supplements. 173, p. 15-18 4 p.

    Research output: Contribution to journalJournal article

  24. Published

    Ages and luminosities of young SMC/LMC star clusters and the recent star formation history of the Clouds

    Glatt, K., Grebel, E. K. & Koch, A., 07/2010, In: Astronomy and Astrophysics. 517, 15 p., A50.

    Research output: Contribution to journalJournal articlepeer-review

  25. Published

    Structural parameters of seven small magellanic cloud intermediate-age and old star clusters

    Glatt, K., Grebel, E. K., Gallagher III, J. S., Nota, A., Sabbi, E., Sirianni, M., Clementini, G., Costa, G. D., Tosi, M., Harbeck, D., Koch, A. & Kayser, A., 1/10/2009, In: The Astronomical Journal. 138, 5, p. 1403-1416 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  26. Published

    Age determination of six intermediate-age small magellanic cloud star clusters with HST/ACS

    Glatt, K., Grebel, E. K., Sabbi, E., Gallagher III, J. S., Nota, A., Sirianni, M., Clementini, G., Tosi, M., Harbeck, D., Koch, A., Kayser, A. & Costa, G. D., 12/09/2008, In: The Astronomical Journal. 136, 4, p. 1703-1727 25 p.

    Research output: Contribution to journalJournal articlepeer-review

  27. Published

    An accurate age determination for the small magellanic cloud star cluster NGC 121 with the Hubble Space Telescope / advanced camera for surveys

    Glatt, K., Gallagher III, J. S., Grebel, E. K., Nota, A., Sabbi, E., Sirianni, M., Clementini, G., Tosi, M., Harbeck, D., Koch, A. & Cracraft, M., 25/02/2008, In: The Astronomical Journal. 135, 4, p. 1106-1116 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  28. Published

    Young star clusters in the SMC

    Glatt, K., Grebel, E. K. & Koch, A., 2009, Globular Clusters: Guides to Galaxies. Richtler, T. & Larsen, S. (eds.). Springer, p. 119-120 2 p. (Eso Astrophysics Symposia).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

  29. Published

    Ages, distances, and fiducials for seven SMC star clusters with HST/ACS

    Glatt, K., Gallagher III, J. S., Grebel, E. K., Nota, A., Sabbi, E., Sirianni, M., Clementini, G., Tosi, M., Harbeck, D. & Koch, A., 2008, In: Bulletin of the American Astronomical Society. 39, p. 836

    Research output: Contribution to journalMeeting abstract

  30. Published

    Star clusters in the large magellanic cloud

    Glatt, K., Grebel, E. K. & Koch, A., 2005, In: Astronomical Notes / Astronomische Nachrichten. 326, 7, p. 651-652 2 p.

    Research output: Contribution to journalMeeting abstract

  31. Published

    Satellite anisotropies: a polar great plane of M31 early-type companions

    Grebel, E. K., Koch, A. & Sambhus, N., 2005, In: Bulletin of the American Astronomical Society. 37, p. 1346

    Research output: Contribution to journalMeeting abstract

  32. Published

    Insights into the chemical composition of the metal-poor Milky Way halo globular cluster NGC 6426

    Hanke, M., Koch, A., Hansen, C. J. & McWilliam, A., 03/2017, In: Astronomy and Astrophysics. 599, 15 p., A97.

    Research output: Contribution to journalJournal articlepeer-review

  33. Published

    Chemical abundances in a high-velocity RR Lyrae star near the bulge

    Hansen, C. J., Rich, R. M., Koch, A., Xu, S., Kunder, A. & Ludwig, H-G., 1/06/2016, In: Astronomy and Astrophysics. 590, 9 p., A39.

    Research output: Contribution to journalJournal articlepeer-review

  34. Published

    Something borrowed, something blue: the nature of blue metal-poor stars inferred from their colours and chemical abundances

    Hansen, C. J., Jofre, P., Koch, A., McWilliam, A. & Sneden, C. S., 02/2017, In: Astronomy and Astrophysics. 598, 16 p., A54.

    Research output: Contribution to journalJournal articlepeer-review

  35. Published

    Stellar science from a blue wavelength range: a possible design for the blue arm of 4MOST

    Hansen, C. J., Ludwig, H-G., Seifert, W., Koch, A., Xu, W., Caffau, E., Christlieb, N., Korn, A. J., Lind, K., Sbordone, L., Ruchti, G. R., Feltzing, S., De jong, R. S., Barden, S. & Schnurr, O., 10/09/2015, In: Astronomical Notes / Astronomische Nachrichten. 336, 7, p. 665-676 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  36. Published

    Andromeda IX: properties of the faintest M31 dwarf satellite galaxy

    Harbeck, D., Gallagher III, J. S., Grebel, E. K., Koch, A. & Zucker, D. B., 10/04/2005, In: The Astrophysical Journal. 623, 1, p. 159-163 5 p.

    Research output: Contribution to journalJournal articlepeer-review

  37. Published

    Chemical abundances of metal-poor RR Lyrae stars in the Magellanic Clouds

    Haschke, R., Grebel, E. K., Frebel, A., Duffau, S., Hansen, C. J. & Koch, A., 16/08/2012, In: The Astronomical Journal. 144, 3, 17 p., 88.

    Research output: Contribution to journalJournal articlepeer-review

  38. Published

    Evidence for a chemical enrichment coupling of globular clusters and field stars in the Fornax dSph

    Hendricks, B., Boeche, C., Johnson, C. I., Frank, M. J., Koch, A., Mateo, M. & Bailey III, J. I., 01/2016, In: Astronomy and Astrophysics. 585, 17 p., A86.

    Research output: Contribution to journalJournal articlepeer-review

  39. Published

    Insights from the outskirts: chemical and dynamical properties in the outer parts of the Fornax dwarf spheroidal galaxy

    Hendricks, B., Koch, A., Walker, M., Johnson, C. I., Penarrubia, J. & Gilmore, G., 12/2014, In: Astronomy and Astrophysics. 572, 19 p., A82.

    Research output: Contribution to journalJournal articlepeer-review

  40. Published

    The metal-poor knee in the Fornax dwarf spheroidal galaxy

    Hendricks, B., Koch, A., Lanfranchi, G. A., Boeche, C., Walker, M., Johnson, C. I., Penarrubia, J. & Gilmore, G., 1/04/2014, In: The Astrophysical Journal. 785, 2, 9 p., 102.

    Research output: Contribution to journalJournal articlepeer-review

  41. Published

    Evidence for multiple populations in intermediate age cluster Lindsay 1 in the SMC

    Hollyhead, K., Kacharov, N., Lardo, C., Bastian, N., Hilker, M., Rejkuba, M., Koch, A., Grebel, E. K. & Georgiev, I., 11/02/2017, In: Monthly Notices of the Royal Astronomical Society. 465, 1, p. L39-L43 5 p.

    Research output: Contribution to journalJournal articlepeer-review

  42. Published

    Kinematics at the edge of the galactic bulge: evidence for cylindrical rotation

    Howard, C. D., Rich, R. M., Clarkson, W., Mallery, R., Kormendy, J., Propris, R. D., Robin, A. C., Fux, R., Reitzel, D. B., Zhao, H., Kuijken, K. & Koch, A., 24/08/2009, In: Astrophysical Journal Letters. 702, 2, p. L153-L157 5 p.

    Research output: Contribution to journalJournal articlepeer-review

  43. Published

    The Bulge Radial Velocity Assay (BRAVA): I. Sample selection and a rotation curve

    Howard, C. D., Rich, R. M., Reitzel, D. B., Koch, A., Propris, R. D. & Zhao, H., 1/12/2008, In: The Astrophysical Journal. 688, 2, p. 1060-1077 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  44. Published

    The Bulge Radial Velocity Assay [BRAVA]: techniques and results

    Howard, C. D., Reitzel, D. B., Rich, R. M., Koch, A. & Zhao, H., 2007.

    Research output: Contribution to conference - Without ISBN/ISSN Poster

  45. Published

    Selecting Sagittarius: identification and chemical characterization of the Sagittarius stream

    Hyde, E. A., Keller, S., Zucker, D. B., Ibata, R., Siebert, A., Lewis, G. F., Penarrubia, J., Irwin, M., Gilmore, G., Lane, R. R., Koch, A., Conn, A. R., Diakogiannis, F. I. & Martell, S., 2/06/2015, In: The Astrophysical Journal. 805, 2, 13 p., 189.

    Research output: Contribution to journalJournal articlepeer-review

  46. Published

    Selecting Sagittarius: a study of Sagittarius dwarf members throughout the Milky Way Galactic halo

    Hyde, E. A., Zucker, D. B., Keller, S., Siebert, A., Ibata, R. A., Penarrubia, J., Martell, S., Lewis, G., Irwin, M. & Koch, A., 2013, In: Bulletin of the American Astronomical Society. 221, 425.03.

    Research output: Contribution to journalMeeting abstract

  47. Published

    Hermes and the Sagittarius dwarf: a low metallicity goldmine?

    Hyde, E. A., Zucker, D. B., Irwin, M., Penarrubia, J. & Koch, A., 2011. 325 p.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paper

  48. Published

    Was the progenitor of the Sagittarius Stream a disc galaxy? Recent results & observations

    Hyde, E. A., Zucker, D. B., Peñarrubia, J., Irwin, M., Lane, R., Lewis, G. F., Gilmore, G. & Koch, A., 2011, In: Bulletin of the American Astronomical Society. 217, 152.28.

    Research output: Contribution to journalMeeting abstract

  49. Published

    Light, Alpha, and Fe-peak element abundances in the Galactic bulge

    Johnson, C. I., Rich, R. M., Kobayashi, C., Kunder, A. & Koch, A., 9/09/2014, In: The Astronomical Journal. 148, 4, 32 p., 67.

    Research output: Contribution to journalJournal articlepeer-review

  50. Published

    Metallicity distribution functions, radial velocities, and alpha element abundances in three off-axis bulge fields

    Johnson, C. I., Rich, R. M., Kobayashi, C., Kunder, A., Pilachowski, C. A., Koch, A. & Propris, R. D., 27/02/2013, In: The Astrophysical Journal. 765, 2, 47 p., 157.

    Research output: Contribution to journalJournal articlepeer-review

  51. Published

    The chemical composition of RGB stars in off-axis bulge field

    Johnson, C. I., Rich, R. M., Kunder, A., Propris, R. D., Kobayashi, C. & Koch, A., 2012, In: Bulletin of the American Astronomical Society. 219, 152.11.

    Research output: Contribution to journalMeeting abstract

  52. Published

    Galactic evolution of sulphur as traced by globular clusters

    Kacharov, N., Koch, A., Caffau, E. & Sbordone, L., 24/04/2015, In: Astronomy and Astrophysics. 577, 9 p., A18.

    Research output: Contribution to journalJournal articlepeer-review

  53. Published

    A study of rotating globular clusters: the case of the old, metal-poor globular cluster NGC 4372

    Kacharov, N., Bianchini, P., Koch, A., Frank, M. J., Martin, N. F., van de Ven, G., Puzia, T. H., McDonald, I., Johnson, C. I. & Zijlstra, A. A., 11/07/2014, In: Astronomy and Astrophysics. 567, 12 p., A69.

    Research output: Contribution to journalJournal articlepeer-review

  54. Published

    A comprehensive chemical abundance study of the outer halo globular cluster M 75

    Kacharov, N., Koch, A. & McWilliam, A., 10/06/2013, In: Astronomy and Astrophysics. 554, 15 p., A81.

    Research output: Contribution to journalJournal articlepeer-review

  55. Published

    An abundance study of the outer halo globular cluster M75

    Kacharov, N. & Koch, A., 2013, In: Memorie della Societa Astronomica Italiana. 84, p. 224

    Research output: Contribution to journalMeeting abstract

  56. Published

    Precise abundance analysis of the outer halo globular cluster M 75

    Kacharov, N. & Koch, A., 2012, In: AIP Conference Proceedings. 1480, p. 385

    Research output: Contribution to journalJournal article

  57. Published

    The age-metallicity relation of the SMC

    Kayser, A., Grebel, E. K., Harbeck, D., Cole, A. A., Koch, A., Gallagher III, J. S. & Da Costa, G., 2009, Globular Clusters: Guides to Galaxies. Richtler, T. & Larsen, S. (eds.). Springer, p. 157-160 4 p. (Eso Astrophysics Symposia).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter

  58. Published

    A spectroscopy-based age-metallicity relation of the SMC

    Kayser, A., Grebel, E. K., Harbeck, D., Cole, A. A., Koch, A., Glatt, K., Gallagher III, J. S. & Da Costa, G., 2007, Stellar Populations as Building Blocks of Galaxies. Peletier, R. F. & Vazdekis, A. (eds.). Cambridge University Press, Vol. 2. p. 351-352 2 p. (Proceedings of the International Astronomical Union; vol. S241).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

  59. Published

    Another look at the size of the low-surface brightness galaxy VCC 1661 in the Virgo Cluster

    Koch, A., Black, C. S., Rich, R. M., Longstaff, F. A., Collins, M. L. M. & Janz, J., 05/2017, In: Astronomical Notes / Astronomische Nachrichten. 338, 4, p. 503-509 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  60. Published

    Galactic Pal-eontology: abundance analysis of the disrupted globular cluster Palomar 5

    Koch, A. & Cote, P., 1/05/2017, In: Astronomy and Astrophysics. 601, 9 p., A41.

    Research output: Contribution to journalJournal articlepeer-review

  61. Published

    Metal-poor stars towards the Galactic bulge: a population potpourri

    Koch, A., McWilliam, A., Preston, G. W. & Thompson, I. P., 1/03/2016, In: Astronomy and Astrophysics. 587, 15 p., A124.

    Research output: Contribution to journalJournal articlepeer-review

  62. Published

    Major mergers with small galaxies: the discovery of a Magellanic-type galaxy at z=0.12

    Koch, A., Frank, M. J., Pasquali, A., Rich, R. M. & Rabitz, A., 15/12/2015, In: The Astrophysical Journal. 815, 2, 10 p., 105.

    Research output: Contribution to journalJournal articlepeer-review

  63. Published

    A detection of gas associated with the M31 Stellar Stream

    Koch, A., Danforth, C. W., Rich, R. M., Ibata, R. A. & Keeney, B. A., 9/07/2015, In: The Astrophysical Journal. 807, 2, 9 p., 153.

    Research output: Contribution to journalJournal articlepeer-review

  64. Published

    A chemical confirmation of the faint Boötes II dwarf Spheroidal Galaxy

    Koch, A. & Rich, R. M., 25/09/2014, In: The Astrophysical Journal. 794, 1, 9 p., 89.

    Research output: Contribution to journalJournal articlepeer-review

  65. Published

    The chemical composition of a regular halo globular cluster: NGC 5897

    Koch, A. & McWilliam, A., 05/2014, In: Astronomy and Astrophysics. 565, 13 p., A23.

    Research output: Contribution to journalJournal articlepeer-review

  66. Published

    A spectroscopic binary in the Hercules dwarf spheroidal galaxy

    Koch, A., Hansen, T., Feltzing, S. & Wilkinson, M. I., 13/12/2013, In: The Astrophysical Journal. 780, 1, 6 p., 91.

    Research output: Contribution to journalJournal articlepeer-review

  67. Published

    Neutron-capture element deficiency of the Hercules dwarf spheroidal galaxy

    Koch, A., Feltzing, S., Adén, D. & Matteucci, F., 06/2013, In: Astronomy and Astrophysics. 554, 10 p., A5.

    Research output: Contribution to journalJournal articlepeer-review

  68. Published

    Threshing in action: the tidal disruption of a dwarf galaxy by the Hydra I cluster

    Koch, A., Burkert, A., Rich, R. M., Collins, M. L. M., Black, C. S., Hilker, M. & Benson, A. J., 25/07/2012, In: Astrophysical Journal Letters. 755, 1, 7 p., L13.

    Research output: Contribution to journalJournal articlepeer-review

  69. Published

    Sulphur in the metal poor globular cluster NGC 6397

    Koch, A. & Caffau, E., 10/2011, In: Astronomy and Astrophysics. 534, 6 p., A52.

    Research output: Contribution to journalJournal articlepeer-review

  70. Published

    Discovery of a super-Li-rich turnoff star in the metal-poor globular cluster NGC 6397

    Koch, A., Lind, K. & Rich, R. M., 23/08/2011, In: Astrophysical Journal Letters. 738, 2, 5 p., L29.

    Research output: Contribution to journalJournal articlepeer-review

  71. Published

    A differential chemical element analysis of the metal-poor globular cluster NGC 6397

    Koch, A. & McWilliam, A., 19/07/2011, In: The Astronomical Journal. 142, 2, 13 p., 63.

    Research output: Contribution to journalJournal articlepeer-review

  72. Published

    Chemical abundances for the outer halo cluster Pal 4 from co-added high-resolution spectroscopy

    Koch, A. & Côté, P., 07/2010, In: Astronomy and Astrophysics. 517, 15 p., A59.

    Research output: Contribution to journalJournal articlepeer-review

  73. Published

    A differential chemical abundance scale for the globular cluster M5

    Koch, A. & McWilliam, A., 22/04/2010, In: The Astronomical Journal. 139, 6, p. 2289-2299 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  74. Published

    A statistical analysis of the late-type stellar content in the Andromeda Halo

    Koch, A. & Rich, R. M., 21/04/2010, In: The Astronomical Journal. 139, 6, p. 2279-2288 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  75. Published

    All quiet in the outer halo: chemical abundances in the globular cluster Pal 3

    Koch, A., Côté, P. & McWilliam, A., 11/2009, In: Astronomy and Astrophysics. 506, 2, p. 729-743 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  76. Published

    Complexity in small-scale dwarf spheroidal galaxies

    Koch, A., Adén, D., Grebel, E. K. & Feltzing, S., 08/2009, In: Proceedings of the International Astronomical Union. 5, S265, p. 227-232 6 p.

    Research output: Contribution to journalJournal articlepeer-review

  77. Published

    A spectroscopic confirmation of the Bootes II dwarf spheroidal

    Koch, A., Wilkinson, M. I., Kleyna, J., Irwin, M., Zucker, D. B., Belokurov, V., Gilmore, G., Fellhauer, M. & Wyn Evans, N., 1/01/2009, In: The Astrophysical Journal. 690, 1, p. 453-462 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  78. Published

    Kinematic and chemical constraints on the formation of M31's inner and outer halo

    Koch, A., Rich, R. M., Reitzel, D. B., Martin, N. F., Ibata, R. A., Chapman, S. C., Majewski, S. R., Mori, M., Loh, Y-S., Ostheimer, J. C. & Tanaka, M., 20/12/2008, In: The Astrophysical Journal. 689, 2, p. 958-982 25 p.

    Research output: Contribution to journalJournal articlepeer-review

  79. Published

    The highly unusual chemical composition of the Hercules dwarf spheroidal galaxy

    Koch, A., McWilliam, A., Grebel, E. K., Zucker, D. B. & Belokurov, V., 3/11/2008, In: Astrophysical Journal Letters. 688, 1, p. L13-L16 4 p.

    Research output: Contribution to journalJournal articlepeer-review

  80. Published

    Complexity on small scales III: iron and α element abundances in the Carina dwarf spheroidal galaxy

    Koch, A., Grebel, E. K., Gilmore, G. F., Wyse, R. F. G., Kleyna, J., Harbeck, D., Wilkinson, M. I. & Wyn Evans, N., 13/03/2008, In: The Astronomical Journal. 135, 4, p. 1580-1597 18 p.

    Research output: Contribution to journalJournal articlepeer-review

  81. Published

    A new abundance scale for the globular cluster 47 Tuc

    Koch, A. & McWilliam, A., 12/03/2008, In: The Astronomical Journal. 135, 4, p. 1551-1566 16 p.

    Research output: Contribution to journalJournal articlepeer-review

  82. Published

    Stellar kinematics in the remote Leo II dwarf spheroidal galaxy: another brick in the wall

    Koch, A., Kleyna, J., Wilkinson, M. I., Grebel, E. K., Gilmore, G. F., Wyn Evans, N., Wyse, R. F. G. & Harbeck, D., 8/06/2007, In: The Astronomical Journal. 134, 2, p. 566-578 13 p.

    Research output: Contribution to journalJournal articlepeer-review

  83. Published

    Stellar kinematics and metallicities in the Leo I dwarf spheroidal galaxy: wide-field implications for galactic evolution

    Koch, A., Wilkinson, M. I., Kleyna, J., Gilmore, G., Grebel, E. K., Mackey, A. D., Wyn Evans, N. & Wyse, R. F. G., 1/03/2007, In: The Astrophysical Journal. 657, 1, p. 241-261 21 p.

    Research output: Contribution to journalJournal articlepeer-review

  84. Published

    Complexity on small scales: II. Metallicities and ages in the Leo II dwarf spheroidal galaxy

    Koch, A., Grebel, E. K., Kleyna, J., Wilkinson, M. I., Harbeck, D., Gilmore, G., Wyse, R. F. G. & Wyn Evans, N., 01/2007, In: The Astronomical Journal. 133, 1, p. 270-283 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  85. Published

    The anisotropic distribution of M31 satellite galaxies: a polar great plane of early-type companions

    Koch, A. & Grebel, E. K., 03/2006, In: The Astronomical Journal. 131, 3, p. 1405-1415 11 p.

    Research output: Contribution to journalJournal articlepeer-review

  86. Published

    Complexity on small scales: the metallicity distribution of the Carina dwarf spheroidal galaxy

    Koch, A., Grebel, E. K., Wyse, R. F. G., Kleyna, J., Wilkinson, M. I., Harbeck, D., Gilmore, G. & Wyn Evans, N., 02/2006, In: The Astronomical Journal. 131, 2, p. 895-911 17 p.

    Research output: Contribution to journalJournal articlepeer-review

  87. Published

    Mass segregation in the globular cluster Palomar 5 and its tidal tails

    Koch, A., Grebel, E. K., Odenkirchen, M., Martínez-Delgado, D. & Caldwell, J. A. R., 11/2004, In: The Astronomical Journal. 128, 5, p. 2274-2287 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  88. Published

    A calibration map for Wide Field Imager photometry

    Koch, A., Odenkirchen, M., Grebel, E. K. & Caldwell, J. A. R., 8/12/2003, In: Astronomical Notes / Astronomische Nachrichten. 325, 4, p. 299-306 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  89. Published

    Europium abundances in F and G disk dwarfs

    Koch, A. & Edvardsson, B., 01/2002, In: Astronomy and Astrophysics. 381, 2, p. 500-506 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  90. Published

    4MOST: 4-metre Multi-Object Spectroscopic Telescope

    4MOST Consortium, 24/07/2014, In: Proceedings of SPIE. 9147

    Research output: Contribution to journalJournal article

  91. Published

    The Blanco DECam Bulge Survey (BDBS): status and early results

    Koch, A., 2014, In: Bulletin of the American Astronomical Society. 223, 346.19.

    Research output: Contribution to journalMeeting abstract

  92. Published

    Searching for stellar sub-structure in the Galactic bulge

    Koch, A., 2014, In: Bulletin of the American Astronomical Society. 223, 442.04.

    Research output: Contribution to journalMeeting abstract

  93. Published

    Blanco DECam Bulge Survey (BDBS): current status and progress

    Koch, A., 2014, In: Bulletin of the American Astronomical Society. 224, 319.01.

    Research output: Contribution to journalMeeting abstract

  94. Published

    An intermediate-band photometric study of the “Globular Cluster” NGC 2419

    Koch, A., Frank, M. J., Feltzing, S., Adén, D., Kacharov, N. & Wilkinson, M. I., 2013, In: Memorie della Societa Astronomica Italiana. 84, p. 67

    Research output: Contribution to journalMeeting abstract

  95. Published

    4MOST: 4-metre Multi-Object Spetroscopic Telescope

    4MOST Consortium, 2012, In: Proceedings of SPIE. 8446

    Research output: Contribution to journalJournal article

  96. Published

    Small-scale hero: massive-star enrichment in the Hercules dwarf spheroidal

    Koch, A., Matteucci, F. & Feltzing, S., 2012, In: AIP Conference Proceedings. 1480, p. 190

    Research output: Contribution to journalJournal article

  97. Published

    The Gaia-ESO Public Spectroscopic Survey

    Koch, A., 2012, In: The Messenger. 147, p. 25-31 7 p.

    Research output: Contribution to journalJournal article

  98. Published

    A super-Li rich turnoff star in NGC 6397: the puzzle persists

    Koch, A., Lind, K., Thompson, I. B. & Rich, R. M., 2012, In: Memorie della Societa Astronomica Italiana. 22, p. 79

    Research output: Contribution to journalMeeting abstract

  99. Published

    4MOST: 4-meter Multi-Object Spectroscopic Telescope

    4MOST Consortium, 2012, In: EPJ Web of Conferences. 19, 3 p., 09004.

    Research output: Contribution to journalJournal article

  100. Published

    The puzzling assembly of the Milky Way halo: contributions from dwarf Spheroidals and globular clusters

    Koch, A., Lépine, S. & Çalışkan, Ş., 2012, In: EPJ Web of Conferences. 19, 7 p., 03002.

    Research output: Contribution to journalJournal article

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