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Dr Andreas Koch

Formerly at Lancaster University

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  1. Published

    Complexity in small-scale dwarf spheroidal galaxies: Ludwig Biermann Award Lecture

    Koch, A., 2009, Reviews in Modern Astronomy: Formation and Evolution of Cosmic Structures. Röser, S. (ed.). Wiley, Vol. 21. p. 39-69 31 p.

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  2. Published

    The first chemical abundance study of the Hercules dwarf spheroidal galaxy

    Koch, A., McWilliam, A. & Wilkinson, M. I., 2008, In: Bulletin of the American Astronomical Society. 39, p. 896

    Research output: Contribution to Journal/Magazine › Meeting abstract

  3. Published

    Kinematic and chemical constraints on the formation of M31’s inner halo structures

    Koch, A., Rich, R. M. & Reitzel, D. B., 2007, In: Astronomical Notes / Astronomische Nachrichten. 328, 7, p. 653 1 p., D76.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  4. Published

    Chemical abundances in the Carina dwarf spheroidal galaxy

    Koch, A., Grebel, E. K., McWilliam, A., Wyse, R. F. G. & Gilmore, G. F., 2007, In: Astronomical Notes / Astronomische Nachrichten. 328, 7, p. 652 1 p., D75.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  5. Published

    Kinematic and chemical constraints on the formation of M31’s inner halo structures

    Koch, A., Rich, R. M. & Reitzel, D. B., 2007.

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

  6. Published

    Stellar kinematics in the remote Leo I and II dwarf spheroidals

    Koch, A., Wilkinson, M. I., Kleyna, J., Gilmore, G. F., Grebel, E. K., Evans, N. W. & Wyse, R. F. G., 2007.

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

  7. Published

    Chemical abundances in the Carina dwarf spheroidal galaxy

    Koch, A., McWilliam, A., Grebel, E. K., Wyse, R. F. G. & Gilmore, G. F., 2007.

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

  8. Published

    The age-metallicity degeneracy in the dwarf spheroidal Carina as seen by FLAMES

    Koch, A., Grebel, E. K., Wyse, R. F. G., Kleyna, J., Wilkinson, M. I., Harbeck, D., Gilmore, G. & Evans, N. W., 2006, In: The Messenger. 123, p. 38-40 3 p.

    Research output: Contribution to Journal/Magazine › Journal article

  9. Published

    Stellar kinematics in the Leo I dwarf spheroidal galaxy: wide field implications for galactic mass profiles

    Koch, A., Wilkinson, M. I., Kleyna, J., Gilmore, G., Evans, N. W. & Grebel, E. K., 2005, In: Bulletin of the American Astronomical Society. 37, p. 1345

    Research output: Contribution to Journal/Magazine › Meeting abstract

  10. Published

    The chemical evolution of subpopulations in the Carina dwarf spheroidal

    Koch, A., Wilkinson, M., Grebel, E. K., Harbeck, D., Kleyna, J., Wyse, R. F. G., Gilmore, G. & Evans, N. W., 2005, In: Proceedings of the International Astronomical Union. 1, C198, p. 134-138 5 p.

    Research output: Contribution to Journal/Magazine › Journal article

  11. Published

    Chemical evolution in the Carina dwarf spheroidal

    Koch, A., Grebel, E. K., Harbeck, D., Wilkinson, M. I., Kleyna, J., Gilmore, G., Wyse, R. F. G. & Evans, N. W., 2005, Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites. Randich, S. & Pasquini, L. (eds.). Springer, p. 249-251 3 p. (ESO Astrophysics Symposia).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  12. Published

    The metallicity and age distribution of the Carina dwarf spheroidal galaxy

    Koch, A., Grebel, E. K., Harbeck, D., Wilkinson, M. I., Kleyna, J., Gilmore, G., Wyse, R. F. G. & Evans, N. W., 2004, In: Astronomical Notes / Astronomische Nachrichten. 325, S1, p. 44 1 p.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  13. Published

    R-process and α-elements in the Galactic disk: kinematic correlations

    Koch, A. & Grebel, E. K., 2004, Planets to Cosmology: Essential Science In Hubble’s Final Years. Livio, M. & Casertano, S. (eds.). Cambridge University Press, 5 p. (Space Telescope Science Institute Symposium Series).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  14. Published

    Correcting spatial gradients: the case of Wide Field Imager photometry

    Koch, A., Grebel, E. K., Odenkirchen, M. & Caldwell, J. A. R., 2004, In: The Messenger. 115, p. 37-39 3 p.

    Research output: Contribution to Journal/Magazine › Journal article

  15. Published

    The luminosity function of Palomar 5 and Its tidal tails

    Koch, A., Odenkirchen, M., Grebel, E. K., Martinez-Delgado, D. & Caldwell, J. A. R., 2004, In: ASP Conference Series. 327, p. 333-336 4 p.

    Research output: Contribution to Journal/Magazine › Journal article

  16. Published

    A retrospective of r-process and a-element abundances in the Galactic disk: correlations with rotational velocity

    Koch, A., Grebel, E. K. & Odenkirchen, M., 2003, In: Astronomical Notes / Astronomische Nachrichten. 324, S3, p. 144-145 2 p.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  17. Published

    Mass segregation in the low-concentration globular cluster Palomar 5

    Koch, A., Odenkirchen, M., Grebel, E. K., Martinez-Delgado, D. & Caldwell, J. A. R., 2003, In: Astronomical Notes / Astronomische Nachrichten. 324, S3, p. 144 1 p.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  18. Published

    A calibration map for the Wide Field Imager

    Koch, A., Odenkirchen, M., Caldwell, J. A. R. & Grebel, E. K., 2003, In: Astronomical Notes / Astronomische Nachrichten. 324, S2, p. 95 1 p.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  19. Published

    The mass function of the globular cluster Palomar 5 and its tidal tails

    Koch, A., Odenkirchen, M., Caldwell, J. A. R. & Grebel, E. K., 2003, In: Astronomical Notes / Astronomische Nachrichten. 324, S2, p. 79 1 p.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  20. Published

    Formation histories of galactic halos via chemical and dynamical analyses of near-by stellar systems: Habilitation Thesis

    Koch, A., 2014, University of Heidelberg.

    Research output: Thesis › Doctoral Thesis

  21. Published

    Chemical and kinematical evolution in nearby dwarf spheroidal galaxies

    Koch, A., 2006, University of Basel. 194 p.

    Research output: Thesis › Doctoral Thesis

  22. Published

    The luminosity function of the globular cluster Palomar 5 and its tidal tails

    Koch, A., 2003, University of Heidelberg.

    Research output: Thesis › Master's Thesis

  23. Published

    Before the bar: kinematic detection of a spheroidal metal-poor bulge component

    Kunder, A., Rich, R. M., Koch, A., Storm, J., Nataf, D. M., Propris, R. D., Walker, A., Bono, G., Johnson, C. I., Shen, J. & Li, Z.-Y., 18/04/2016, In: Astrophysical Journal Letters. 821, 2, 6 p., L25.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  24. Published

    A high-velocity bulge RR Lyrae variable on a halo-like orbit

    Kunder, A., Rich, R. M., Hawkins, K., Poleski, R., Storm, J., Johnson, C. I., Shen, J., Li, Z.-Y., Cordero, M. J., Nataf, D. M., Bono, G., Walker, A. R., Koch, A., Propris, R. D., Udalski, A., Szymanski, M. K., Soszynski, I., Pietrzynski, G., Ulaczyk, K. & Wyrzykowski, L. & 4 others, Pietrukowicz, P., Skowron, J., Kozłowski, S. & Mróz, P., 16/07/2015, In: Astrophysical Journal Letters. 808, 1, 6 p., L12.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  25. Published

    The Bulge Radial Velocity Assay (BRAVA): II. Complete sample and data release

    Kunder, A., Koch, A., Rich, R. M., Propris, R. D., Howard, C. D., Stubbs, S. A., Johnson, C. I., Shen, J., Wang, Y., Robin, A. C., Kormendy, J., Soto, M., Frinchaboy, P., Reitzel, D. B., Zhao, H. & Origlia, L., 6/02/2012, In: The Astronomical Journal. 143, 3, 14 p., 57.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  26. Published

    The Bulge Radial Velocity Assay: new observations and results

    Kunder, A., Propris, R. D., Rich, R. M. & Koch, A., 2011, In: Bulletin of the American Astronomical Society. 217, 241.12.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  27. Published

    A first measurement of the proper motion of the Leo II dwarf spheroidal galaxy

    Lépine, S., Koch, A., Rich, R. M. & Kuijken, K., 24/10/2011, In: The Astrophysical Journal. 741, 2, 10 p., 100.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  28. Published

    Population gradients and photometric metallicities in early- and transition-type dwarf galaxies: clues from the Sculptor group

    Lianou, S., Grebel, E. K., Da Costa, G. S., Rejkuba, M., Jerjen, H. & Koch, A., 17/01/2013, In: Astronomy and Astrophysics. 550, 21 p., A7.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  29. Published

    Spectroscopic versus photometric metallicities: Milky Way dwarf spheroidal companions as a test case

    Lianou, S., Grebel, E. K. & Koch, A., 5/07/2011, In: Astronomy and Astrophysics. 531, 17 p., A152.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  30. Published

    Dwarf spheroidals in the M81 Group: metallicity distribution functions and population gradients

    Lianou, S., Grebel, E. K. & Koch, A., 19/10/2010, In: Astronomy and Astrophysics. 521, 15 p., A43.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  31. Published

    M 81 group dSphs: metallicity distribution functions and gradients

    Lianou, S., Grebel, E. K. & Koch, A., 2011, In: EAS Publications Series. 48, p. 91-92 2 p.

    Research output: Contribution to Journal/Magazine › Journal article

  32. Published

    Dwarf spheroidals in the M81 galaxy group

    Lianou, S., Grebel, E. K. & Koch, A., 2010, In: ASP Conference Series. 424, p. 242-243 2 p.

    Research output: Contribution to Journal/Magazine › Journal article

  33. Published

    Early-type dwarf galaxies in the M81 group

    Lianou, S., Grebel, E. K. & Koch, A., 2009, Stellar Populations: Planning for the Next Decade. Bruzual, G. R. & Charlot, S. (eds.). Cambridge University Press, p. 115-118 4 p. (Proceedings of the International Astronomical Union; no. 262).

    Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review

  34. Published

    Dwarf spheroidal galaxies in the M81 group of galaxies

    Lianou, S., Grebel, E. K. & Koch, A., 2009, In: Astronomical Notes / Astronomische Nachrichten. 330, 9-10, p. 995-997 3 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  35. Published

    Triangulum II: a very metal-poor and dynamically hot stellar system

    Martin, N. F., Ibata, R. A., Collins, M. L. M., Rich, R. M., Bell, E. F., Ferguson, A. M. N., Laevens, B. P. M., Rix, H.-W., Chapman, S. C. & Koch, A., 5/02/2016, In: The Astrophysical Journal. 818, 1, 7 p., 40.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  36. Published

    The Gaia ESO survey: calibration strategy

    Pancino, E. & Koch, A., 02/2017, In: Astronomy and Astrophysics. 598, 16 p., A5.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  37. Published

    The Be-test in the Li-rich star #1657 of NGC 6397: evidence for Li-flash in RGB stars?

    Pasquini, L., Koch, A., Smiljanic, R., Bonifacio, P. & Modigliani, A., 03/2014, In: Astronomy and Astrophysics. 563, 5 p., A3.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  38. Published

    Separating the conjoined red clump in the Galactic bulge: kinematics and abundances

    Propris, R. D., Rich, R. M., Kunder, A., Johnson, C. I., Koch, A., Brough, S., Conselice, C. J., Gunawardhana, M., Palamara, D., Pimbblet, K. & Wijesinghe, D., 25/04/2011, In: Astrophysical Journal Letters. 732, 2, 5 p., L36.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  39. Published

    On the reported death of the MACHO era

    Quinn, D. P., Wilkinson, M. I., Irwin, M. J., Marshall, J., Koch, A. & Belokurov, V., 29/04/2009, In: Monthly Notices of the Royal Astronomical Society: Letters. 396, 1, p. L11-L15 5 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  40. Published

    Dark matter constraints from wide halo binary stars

    Quinn, D. P., Wilkinson, M. I., Irwin, M. J., Marshall, J., Koch, A. & Belokurov, V., 2010, In: ASP Conference Series. 435, p. 453-456 4 p.

    Research output: Contribution to Journal/Magazine › Journal article

  41. Published

    Kinematic and chemical constraints on the formation of M31’s inner halo structures

    Reitzel, D. B., Koch, A. & Rich, R. M., 2008, In: Bulletin of the American Astronomical Society. 39, p. 897

    Research output: Contribution to Journal/Magazine › Meeting abstract

  42. Published

    The line of sight velocity distribution of the Galactic bulge

    Reitzel, D. B., Howard, C. D., Rich, R. M., Koch, A. & Zhao, H., 2007, In: Bulletin of the American Astronomical Society. 38, p. 1149

    Research output: Contribution to Journal/Magazine › Meeting abstract

  43. Published

    A tidally distorted dwarf galaxy near NGC 4449

    Rich, R. M., Collins, M. L. M., Black, C. M., Longstaff, F. A., Koch, A., Benson, A. J. & Reitzel, D. B., 9/02/2012, In: Nature. 482, 7384, p. 192-194 3 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  44. Published

    The Bulge Radial Velocity Assay (BRAVA): final results, a new high velocity star, and public data release

    Rich, R. M., Kunder, A., Propris, R. D. & Koch, A., 2012, In: Bulletin of the American Astronomical Society. 219, 252.02.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  45. Published

    Striking agreement between galactic bulge kinematics from the BRAVA survey, and an N-body bar

    Rich, R. M., Shen, J., Howard, C. D., Propris, R. D., Koch, A. & Reitzel, D. B., 2010, In: Bulletin of the American Astronomical Society. 215, 321.06.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  46. Published

    Keck/Deimos spectroscopy of distant M31 fields with deep HST imaging

    Rich, R. M., Brown, T. M., Reitzel, D. B., Ferguson, H. & Koch, A., 2007, In: Bulletin of the American Astronomical Society. 38, p. 1155

    Research output: Contribution to Journal/Magazine › Meeting abstract

  47. Published

    The Halos and Environments of Nearby Galaxies (HERON) Survey

    Rich, R. M., Brosch, N., Bullock, J., Burkert, A., Collins, M. L. M., de Groot, L., Kennefick, J., Koch, A., Longstaff, F. A. & Sales, L., 21/03/2017, In: Proceedings of the International Astronomical Union. 11, S321, p. 186-189 4 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  48. Published

    The Gaia-ESO Survey: detailed abundances in the metal-poor globular cluster NGC 4372

    Roman, I. S., Muñoz, C., Geisler, D., Villanova, S., Kacharov, N., Koch, A., Carraro, G., Tautvaišiene, G., Vallenari, A., Alfaro, E. J., Bensby, T., Flaccomio, E., Francois, P., Korn, A. J., Pancino, E., Recio-Blanco, A., Smiljanic, R., Bergemann, M., Costado, M. T. & Damiani, F. & 11 others, Heiter, U., Hourihane, A., Jofré, P., Lardo, C., Laverny, P. D., Masseron, T., Morbidelli, L., Sbordone, L., Sousa, S. G., Worley, C. C. & Zaggia, S., 14/04/2015, In: Astronomy and Astrophysics. 579, 14 p., A6.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  49. Published

    A new algorithm for optimizing the wavelength coverage for spectroscopic studies: Spectral Wavelength Optimization Code (swoc)

    Ruchti, G. R., Feltzing, S., Lind, K., Caffau, E., Korn, A. J., Schnurr, O., Hansen, C. J., Koch, A., Sbordone, L. & De jong, R. S., 11/09/2016, In: Monthly Notices of the Royal Astronomical Society. 461, 2, p. 2174-2191 17 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  50. Published

    Dwarf spheroidal galaxy kinematics and spiral galaxy scaling laws

    Salucci, P., Wilkinson, M. I., Walker, M., Gilmore, G., Grebel, E. K., Koch, A., Martins, C. F. & Wyse, F. G., 1/03/2012, In: Monthly Notices of the Royal Astronomical Society. 420, 3, p. 2034-2041 8 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  51. Published

    The local universe at 30 mag/sq. arcsec: extended stellar halos around near-by galaxies

    Schaul, D., Rich, R. M., Black, C. S., Reitzel, D. B., Collins, M. L. M., Koch, A., Longstaff, F. A. & Benson, A., 2013, In: Bulletin of the American Astronomical Society. 221, 146.01.

    Research output: Contribution to Journal/Magazine › Meeting abstract

  52. Published

    An inefficient dwarf: Chemical abundances and the evolution of the Ursa Minor dwarf spheroidal galaxy

    Ural, U., Cescutti, G., Koch, A., Kleyna, J., Feltzing, S. & Wilkinson, M. I., 19/03/2015, In: Monthly Notices of the Royal Astronomical Society. 449, 1, p. 761-770 10 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  53. Published

    Kinematic subpopulations in dwarf spheroidal galaxies

    Ural, U., Wilkinson, M. I., Koch, A., Gilmore, G., Beers, T. C., Belokurov, V., Wyn Evans, N., Grebel, E. K., Vidrih, S. & Zucker, D. B., 18/12/2009, In: Monthly Notices of the Royal Astronomical Society. 402, 2, p. 1357-1368 12 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  54. Published

    Probing the dark matter content of Local Group dwarf spheroidal galaxies with FLAMES

    Wilkinson, M. I., Kleyna, J., Gilmore, G., Evans, N. W., Koch, A., Grebel, E. K., Wyse, R. F. G. & Harbeck, D., 2006, In: The Messenger. 124, p. 25-29 5 p.

    Research output: Contribution to Journal/Magazine › Journal article

  55. Published

    The internal kinematics of dwarf spheroidal galaxies

    Wilkinson, M. I., Kleyna, J., Evans, N. W., Gilmore, G., Read, J. I., Koch, A., Grebel, E. K. & Irwin, M., 2006, In: EAS Publications Series. 20, p. 29-32 4 p.

    Research output: Contribution to Journal/Magazine › Journal article

  56. Published

    Substructure in dwarf spheroidals: a star cluster connection?

    Wilkinson, M. I., Kleyna, J., Evans, N. W., Gilmore, G., Grebel, E. K., Koch, A., Read, J. & Young, R., 2005, In: Proceedings of the International Astronomical Union. 1, C198, p. 240-243 4 p.

    Research output: Contribution to Journal/Magazine › Journal article

  57. Published

    Further evidence of a merger origin for the thick disk: galactic stars along lines of sight to dwarf spheroidal galaxies

    Wyse, R. F. G., Gilmore, G., Norris, J., Wilkinson, M. I., Kleyna, J., Koch, A., Evans, N. W. & Grebel, E. K., 1/03/2006, In: Astrophysical Journal Letters. 639, 1, p. L13-L16 4 p.

    Research output: Contribution to Journal/Magazine › Journal article › peer-review

  58. Published

    Further evidence for a merger origin for the Thick disk: Galactic stars along line-of-sight to dwarf spheroidal galaxies

    Wyse, R. F. G., Gilmore, G., Norris, J., Wilkinson, M. I., Kleyna, J., Koch, A., Evans, N. W. & Grebel, E. K., 2005, In: Bulletin of the American Astronomical Society. 37, p. 1368

    Research output: Contribution to Journal/Magazine › Meeting abstract

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