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 Journal/Magazine › Journal article › peer-review

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.

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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.

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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 Journal/Magazine › Meeting abstract

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 Journal/Magazine › Journal article

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.

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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.

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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 Journal/Magazine › Meeting abstract

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Meeting abstract

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 Journal/Magazine › Meeting abstract

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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.

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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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Meeting abstract

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Meeting abstract

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 Journal/Magazine › Meeting abstract

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article

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 Journal/Magazine › Journal article

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Meeting abstract

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 Journal/Magazine › Journal article › peer-review

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 Journal/Magazine › Journal article › peer-review