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Complexity in small-scale dwarf spheroidal galaxies

  • Andreas Koch (a1), Daniel Adén (a2), Eva K. Grebel (a3) and Sofia Feltzing (a2)

Abstract

Our knowledge about the chemical evolution of the more luminous dwarf spheroidal (dSph) galaxies is constantly growing. However, little is known about the enrichment of the ultrafaint systems recently discovered in large numbers in large Sky Surveys. Low-resolution spectroscopy and photometric data indicate that these galaxies are predominantly metal-poor. On the other hand, the most recent high-resolution abundance analyses indicate that some of these galaxies experienced highly inhomogenous chemical enrichment, where star formation proceeds locally on the smallest scales. Furthermore, these galaxy-contenders appear to contain very metal-poor stars with [Fe/H]< −3 dex and could be the sites of the first stars. Here, we consider the presently available chemical abundance information of the (ultra-) faint Milky Way satellite dSphs. In this context, some of the most peculiar element and inhomogeneous enrichment patterns will be discussed and related to the question of to what extent the faintest dSph candidates and outer halo globular clusters could have contributed to the metal-poor Galactic halo.

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References

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Adén, D., et al. 2009a, A&A, in press (astro-ph/0908.3489)
Adén, D., et al. 2009b, ApJL, submitted
Bailin, J. & Ford, A. 2007, MNRAS, 375, L41
Belokurov, V., et al. 2007, ApJ, 654, 897
Carollo, D., et al. 2007, Nature, 450, 1020
Cohen, J. G. & Huang, W. 2009, ApJ, 701, 1053
Cohen, J. G. & Meléndez, J. 2005a, AJ, 129, 303
Cohen, J. G. & Melendez, J. 2005b, AJ, 129, 1607
D'Antona, F. & Caloi, V. 2008, MNRAS, 390, 693
Faria, D., et al. 2007, A&A, 465, 357
Feltzing, S., Eriksson, K., Kleyna, , & Wilkinson, M. 2009, ApJL, in press
Frebel, A., Simon, J. D., Geha, M., & Willman, B. 2009, ApJ, submitted (arXiv:0902.2395)
Gilmore, G., et al. 2007, ApJ, 663, 948
Grebel, E. K., Gallagher, J. S. III, & Harbeck, D. 2003, AJ, 125, 1926
Hartwick, F. D. A. 1987, NATO ASIC Proc. 207: The Galaxy, 281
Heger, A. & Woosley, S. E. 2008, ApJ, submitted (arXiv:0803.3161)
Helmi, A., et al. 2006, ApJL, 651, L121
Hilker, M. 2006, A&A, 448, 171
Honda, S., Aoki, W., Ishimaru, Y., & Wanajo, S. 2007, ApJ, 666, 1189
Kirby, E. N., Simon, J. D., Geha, M., Guhathakurta, P., & Frebel, A. 2008, ApJL, 685, L43
Koch, A., et al. 2006, AJ, 131, 895
Koch, A., et al. 2008a, AJ, 135, 1580
Koch, A., McWilliam, A., Grebel, E. K., Zucker, D. B., & Belokurov, V. 2008b, ApJ, 688, L13
Koch, A., et al. 2008c, ApJ, 689, 958
Koch, A. 2009, Astronomische Nachrichten, 330, 675
Koch, A., Côté, P., & McWilliam, A. 2009, A&A, in press (astro-ph/0908.2629v1)
Letarte, B., Hill, V., Jablonka, P., Tolstoy, E., François, P., & Meylan, G. 2006, A&A, 453, 547
Martin, N. F., de Jong, J. T. A., & Rix, H.-W. 2008, ApJ, 684, 1075
Moore, B., et al. 1999, ApJL, 524, L19
Norris, J. E., et al. 2008, ApJL, 689, L113
Qian, Y.-Z. & Wasserburg, G. J. 2003, ApJ, 588, 1099
Robertson, B., Bullock, J. S., Font, A. S., Johnston, K. V., & Hernquist, L. 2005, ApJ, 632, 872
Searle, L. & Zinn, R. 1978, ApJ, 225, 357
Shetrone, M. D., Côté, P., & Sargent, W. L. W. 2001, ApJ, 548, 592
Simon, J. D. & Geha, M. 2007, ApJ, 670, 313
Sneden, C., Pilachowski, C. A., & Kraft, R. P. 2000, AJ, 120, 1351
Strigari, L. E., et al. 2008, Nature, 454, 1096
Tolstoy, E., Hill, V., & Tosi, M. 2009 ARA&A, in press (arXiv:0904.4505)
Unavane, M., Wyse, R. F. G., & Gilmore, G. 1996, MNRAS, 278, 727
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Keywords

Complexity in small-scale dwarf spheroidal galaxies

  • Andreas Koch (a1), Daniel Adén (a2), Eva K. Grebel (a3) and Sofia Feltzing (a2)

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