List of oldest stars
The age of the oldest known stars approaches the age of the universe, about 13.8 billion years. These are recognized as among the oldest:
| Name | Age | Distance | Distance descriptor |
|---|---|---|---|
| Cayrel's Star or BPS CS31082-0001 | 12.5 billion years ± 4 billion years | 14,000 ly (4 kpc) | Milky Way Galactic Halo |
| HE 1327-2326 | unstated | 4,000 ly | Milky Way Galactic Halo |
| SDSS J102915+172927 or Caffau's Star | 13 billion years | 4,500 ly (1370 (+150 or −120) pc) | Milky Way Galactic Halo |
| HE0107-5240 | 13 billion years | 36,000 ly | Milky Way Galactic Halo |
| HD 122563 | 13 billion years | 770 ly | Milky Way |
| Sneden's Star | 13 billion years | 15,300 ly | Milky Way Galactic Halo |
| HE 1523-0901 | 13.2 billion years | 7,500 ly | Milky Way Galactic Halo |
| SMSS J031300.36-670839.3 | 13.6 billion years[1] | 6,000 ly | Milky Way Galactic Halo or Globular Clusters |
| BD +17° 3248 | 13.8 ± 4 billion years[2] | 968 ly | Milky Way Galactic Halo |
| HD 140283 or the Methusulah Star | 14.46 ± 0.8 (minimum 13.66) billion years[3] | 190 ly | Milky Way, 19° north of Galactic Centre, closer than the Galactic Bulge |
| 23 stars identified as "from the cosmic dawn in the bulge of the Milky Way"[4] |
Some of these are among the first stars from reionization (the stellar dawn), ending the Dark Ages (cosmology) about 370,000 years after Big Bang[5]
References
- ↑ Miho N. Ishigaki; Nozomu Tominaga; Chiaki Kobayashi; Ken'ichi Nomoto (2014). "FAINT POPULATION III SUPERNOVAE AS THE ORIGIN OF THE MOST IRON-POOR STARS". The Astrophysical Journal Letters. 792 (2): L32. arXiv:1404.4817. Bibcode:2014ApJ...792L..32I. doi:10.1088/2041-8205/792/2/L32.
- ↑ Cowan, John J.; et al. (June 2002), "The Chemical Composition and Age of the Metal-poor Halo Star BD +17°3248", The Astrophysical Journal, 572 (2): 861–879, arXiv:astro-ph/0202429, Bibcode:2002ApJ...572..861C, doi:10.1086/340347
- ↑ H. E. Bond; E. P. Nelan; D. A. VandenBerg; G. H. Schaefer; D. Harmer (2013). "HD 140283: A Star in the Solar Neighborhood that Formed Shortly After the Big Bang". The Astrophysical Journal Letters. 765 (1): L12. arXiv:1302.3180. Bibcode:2013ApJ...765L..12B. doi:10.1088/2041-8205/765/1/L12.
- ↑ 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; P. Mróz (26 November 2015). "Extremely metal-poor stars from the cosmic dawn in the bulge of the Milky Way". Nature. 527 (7579): 484–487. arXiv:1511.03930. Bibcode:2015Natur.527..484H. doi:10.1038/nature15747. PMID 26560034.
- ↑ Rennan Barkana (1 March 2018). "Possible interaction between baryons and dark-matter particles revealed by the first stars". Nature. 555: 71–74. arXiv:1803.06698. Bibcode:2018Natur.555...71B. doi:10.1038/nature25791.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.