Extremely metal-poor stars from the cosmic dawn in the bulge of the Milky Way

L. M. Howes (), A. R. Casey, M. Asplund, S. C. Keller, D. Yong, D. M. Nataf, R. Poleski, K. Lind, C. Kobayashi, C. I. Owen, M. Ness, M. S. Bessell, G. S. Da Costa, B. P. Schmidt, P. Tisserand, A. Udalski, M. K. Szymański, I. Soszyński, G. Pietrzyński, K. Ulaczyk, Ł. Wyrzykowski, P. Pietrukowicz, J. Skowron, S. Kozłowski and P. Mróz
Additional contact information
L. M. Howes: Research School of Astronomy and Astrophysics, Australian National University
A. R. Casey: Institute of Astronomy, University of Cambridge
M. Asplund: Research School of Astronomy and Astrophysics, Australian National University
S. C. Keller: Research School of Astronomy and Astrophysics, Australian National University
D. Yong: Research School of Astronomy and Astrophysics, Australian National University
D. M. Nataf: Research School of Astronomy and Astrophysics, Australian National University
R. Poleski: Warsaw University Observatory, Aleje Ujazdowskie 4
K. Lind: Uppsala University
C. Kobayashi: Research School of Astronomy and Astrophysics, Australian National University
C. I. Owen: Research School of Astronomy and Astrophysics, Australian National University
M. Ness: Max-Planck-Institut für Astronomie, Königstuhl 17
M. S. Bessell: Research School of Astronomy and Astrophysics, Australian National University
G. S. Da Costa: Research School of Astronomy and Astrophysics, Australian National University
B. P. Schmidt: Research School of Astronomy and Astrophysics, Australian National University
P. Tisserand: Research School of Astronomy and Astrophysics, Australian National University
A. Udalski: Warsaw University Observatory, Aleje Ujazdowskie 4
M. K. Szymański: Warsaw University Observatory, Aleje Ujazdowskie 4
I. Soszyński: Warsaw University Observatory, Aleje Ujazdowskie 4
G. Pietrzyński: Warsaw University Observatory, Aleje Ujazdowskie 4
K. Ulaczyk: Warsaw University Observatory, Aleje Ujazdowskie 4
Ł. Wyrzykowski: Warsaw University Observatory, Aleje Ujazdowskie 4
P. Pietrukowicz: Warsaw University Observatory, Aleje Ujazdowskie 4
J. Skowron: Warsaw University Observatory, Aleje Ujazdowskie 4
S. Kozłowski: Warsaw University Observatory, Aleje Ujazdowskie 4
P. Mróz: Warsaw University Observatory, Aleje Ujazdowskie 4

Nature, 2015, vol. 527, issue 7579, 484-487

Abstract: The first stars and their immediate successors should be found today in the central regions (bulges) of galaxies; old, metal-poor stars have now been found in the Milky Way bulge, including one star with an iron abundance about 10,000 times lower than that of the Sun without noticeable carbon enhancement, making it possibly the oldest known star in the Galaxy.

Date: 2015
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DOI: 10.1038/nature15747

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