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Dr Andreas Koch

Formerly at Lancaster University

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  1. Journal article
  2. 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

  3. 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 Journal/Magazine › Journal article › peer-review

  4. 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 Journal/Magazine › Journal article › peer-review

  5. 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 Journal/Magazine › Journal article › peer-review

  6. 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 Journal/Magazine › Journal article › peer-review

  7. 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 Journal/Magazine › Journal article › peer-review

  8. 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 Journal/Magazine › Journal article › peer-review

  9. 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 Journal/Magazine › Journal article › peer-review

  10. 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 Journal/Magazine › Journal article › peer-review

  11. 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

  12. 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 Journal/Magazine › Journal article › peer-review

  13. 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

  14. 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 Journal/Magazine › Journal article › peer-review

  15. 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 Journal/Magazine › Journal article › peer-review

  16. 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 Journal/Magazine › Journal article › peer-review

  17. 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 Journal/Magazine › Journal article › peer-review

  18. 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 Journal/Magazine › Journal article › peer-review

  19. 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 Journal/Magazine › Journal article › peer-review

  20. 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 Journal/Magazine › Journal article › peer-review

  21. 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 Journal/Magazine › Journal article › peer-review

  22. 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 Journal/Magazine › Journal article › peer-review

  23. 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 Journal/Magazine › Journal article › peer-review

  24. 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 Journal/Magazine › Journal article › peer-review

  25. 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 Journal/Magazine › Journal article › peer-review

  26. 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 Journal/Magazine › Journal article › peer-review

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