Linking dwarf galaxies to halo building blocks with the most metal-poor star in Sculptor

Nature

Volumn 464, Issue 7285, 2010, Pages 72-75

  Frebel, Anna ^a   Kirby, Evan N ^b   Simon, Joshua D ^c  

^a HARVARD SMITHSONIAN CENTER FOR ASTROPHYSICS   (United States)

^b CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

^c CARNEGIE OBSERVATORIES   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

METAL;

CHEMICAL COMPOSITION; COSMOLOGY; EXTRATERRESTRIAL MATTER; IRON; MAGNESIUM; SOLAR SYSTEM;

ARTICLE; ASTRONOMY; DWARFISM; HALO EFFECT; KINEMATICS; PRIORITY JOURNAL; SPECTROSCOPY; SUN;

EID: 77950816860     PISSN: 00280836     EISSN: 14764687     Source Type: Journal    
DOI: 10.1038/nature08772     Document Type: Article

References (30)

1. Moore, B. et al. Dark matter substructure within galactic halos. Astrophys. J. 524, L19-L22 (1999).
2. Bullock, J. S. &Johnston, K. V. Tracing galaxy formation with stellar halos. I. Methods. Astrophys. J. 634, 931-949 (2005).
3. Helmi, A. et al. A new view of the dwarf spheroidal satellites of the Milky Way from VLT FLAMES: where are the very metal-poor stars? Astrophys. J. 651, L121-L124 (2006). (Pubitemid 44973088)
4. Kirby, E. N. Guhathakurta, P. Bolte, M., Sneden, C. &Geha, M. C. Multi-element abundance measurements from medium-resolution spectra. I. The Sculptor dwarf spheroidal galaxy. Astrophys. J. 705, 328-346 (2009).
5. Shetrone, M. et al. VLT/UVES abundances in four nearby dwarf spheroidal galaxies. I. Nucleosynthesis and abundance ratios. Astron. J. 125, 684-706 (2003). (Pubitemid 37117545)
6. Geisler, D., Smith, V. V., Wallerstein, G., Gonzalez, G. &Charbonnel, C. "Sculptoring" the galaxy? The chemical compositions of red giants in the Sculptor dwarf spheroidal galaxy. Astron. J. 129, 1428-1442 (2005). (Pubitemid 40653158)
7. Venn, K. A. et al. Stellar chemical signatures and hierarchical galaxy formation. Astron. J. 128, 1177-1195 (2004). (Pubitemid 39470732)
8. Searle, L. &Zinn, R. Compositions of halo clusters and the formation of the galactic halo. Astrophys. J. 225, 357-379 (1978).
9. Kirby, E. N., Guhathakurta, P. &Sneden, C. Metallicity and alpha-element abundance measurement in red giant stars from medium-resolution spectra. Astrophys. J. 682, 1217-1233 (2008).
10. Bernstein, R., Shectman, S. A., Gunnels, S. M., Mochnacki, S. &Athey, A. E. MIKE: a double echelle spectrograph for the Magellan telescopes at Las Campanas Observatory. Soc. SPIE Conf. Ser. (eds Iye, M. &Moorwood, A. F. M.) 4841, 1694-1704 (2003).
11. Battaglia, G. et al. The kinematic status and mass content of the Sculptor dwarf spheroidal galaxy. Astrophys. J. 681, L13-L16 (2008).
12. Frebel, A., Simon, J. D., Geha, M. &Willman, B. High-resolution spectroscopy of extremely metal-poor stars in the least evolved galaxies: Ursa Major II and Coma Berenices. Astrophys. J. 708, 560-583 (2010).
13. Cayrel, R. et al. First stars V-Abundance patterns from C to Zn and supernova yields in the early Galaxy. Astron. Astrophys. 416, 1117-1138 (2004). (Pubitemid 44509444)
14. Fulbright, J. P., Rich, R. M. &Castro, S. Draco 119: a remarkable heavy-elementdeficient giant. Astrophys. J. 612, 447-453 (2004). (Pubitemid 39525553)
15. Koch, A., McWilliam, A., Grebel, E. K., Zucker, D. B. &Belokurov, V. The highly unusual chemical composition of the Hercules dwarf spheroidal galaxy. Astrophys. J. 688, L13-L16 (2008).
16. Schoerck, T. et al. The stellar content of the Hamburg/ESO survey. V. The metallicity distribution function of the Galactic halo. Astron. Astrophys. 507, 817-832 (2009).
17. Frebel, A. et al. Nucleosynthetic signatures of the first stars. Nature 434, 871-873 (2005). (Pubitemid 40558994)
18. Kirby, E. N., Simon, J. D., Geha, M., Guhathakurta, P. &Frebel, A. Uncovering extremely metal-poor stars in the Milky Way's ultra-faint dwarf spheroidal satellite galaxies. Astrophys. J. 685, L43-L46 (2008).
19. Pietrzynski, G. et al. The Araucaria project: the distance to the Sculptor dwarf spheroidal galaxy from infrared photometry of RR Lyrae stars. Astron. J. 135, 1993-1997 (2008).
20. Carollo, D. et al. Two stellar components in the halo of the Milky Way. Nature 450, 1020-1025 (2007). (Pubitemid 350273625)
21. Simon, J. D. &Geha, M. The kinematics of the ultra-faint Milky Way satellites: solving the missing satellite problem. Astrophys. J. 670, 313-331 (2007).
22. Robertson, B., Bullock, J. S., Font, A. S., Johnston, K. V. &Hernquist, L. Lambda cold dark matter, stellar feedback, and the galactic halo abundance pattern. Astrophys. J. 632, 872-881 (2005). (Pubitemid 43074148)
23. Font, A. S., Johnston, K. V., Bullock, J. S. &Robertson, B. E. Phase-space distributions of chemical abundances in Milky Way-type galaxy halos. Astrophys. J. 646, 886-898 (2006).
24. Asplund, M., Grevesse, N., Sauval, A. J. &Scott, P. The chemical composition of the Sun. Annu. Rev. Astron. Astrophys. 47, 481-522 (2009).
25. Geha, M. et al. The least-luminous galaxy: spectroscopy of the Milky Way satellite segue 1. Astrophys. J. 692, 1464-1475 (2009).
26. Barklem, P. S. et al. The Hamburg/ESO R-process enhanced star survey (HERES). II. Spectroscopicanalysis of the survey sample. Astron. Astrophys. 439, 129-151 (2005).
27. Frebel, A. et al. Chemical abundance analysis of the extremely metal-poor star HE 130010157. Astrophys. J. 658, 534-552 (2007).
28. Lai, D. K. et al. Detailed abundances for 28 metal-poor stars: stellar relics in the Milky Way. Astrophys. J. 681, 1524-1556 (2008).
29. Aoki, W. et al. Chemical composition of extremely metal-poor stars in the Sextans dwarf spheroidal galaxy. Astron. Astrophys. 502, 569-578 (2009).
30. Cohen, J. G. &Huang, W. The chemical evolution of the Draco dwarf spheroidal galaxy. Astrophys. J. 701, 1053-1075 (2009).