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- Title
Observations of Very Low-Metallicity Massive Stars.
- Authors
Garcia, Miriam
- Abstract
Very metal-poor massive stars hold the key to interpret high-redshift star-forming galaxies and the early reionization epoch, but also contemporary events such as gravitational waves. To study these objects in resolved environments, we need to resort to dwarf irregular galaxies far from the potential wells of M31 and the Milky Way, and therefore distant. While the archives, recently boosted by the ULLYSES and XSHOOTU programs, store a healthy dataset of massive stars in the Milky Way and the Magellanic Clouds, the number of observed targets with poorer metal content than the SMC (1/5 Zȯ) is dramatically small. This paper reviews the state of observations of very metal-poor massive stars, assessing what can be realistically learned about their physics and evolution with current instrumentation, and arguing whether or not near-future facilities can remedy the gaps in the knowledge that remain.
- Subjects
SUPERGIANT stars; MAGELLANIC clouds; MILKY Way; GALACTIC redshift; GRAVITATIONAL waves
- Publication
Proceedings of the International Astronomical Union, 2022, Vol 18, Issue S361, p36
- ISSN
1743-9213
- Publication type
Article
- DOI
10.1017/S174392132200312X