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 | 14000 ly (4 kpc) | Milky Way Galactic Halo |
| HE 1327-2326 | unstated | 4000 ly | Milky Way Galactic Halo |
| SDSS J102915+172927 or Caffau's Star | 13 billion years | 4500 ly (1.37 +.15 −.12 kpc) | Milky Way Galactic Halo |
| HE0107-5240 | 13 billion years | 36000 ly | Milky Way Galactic Halo |
| HD 122563 | 13 billion years | 770 ly | Milky Way |
| Sneden's Star or BPS CS22892-0052 | 13 billion years | 15300 ly | Milky Way Galactic Halo |
| HE 1523-0901 | 13.2 billion years | 7500 ly | Milky Way Galactic Halo |
| 2MASS J18082002-5104378 B | 13.53 billion years[1][2] | 1950 ly | Milky Way thin disk |
| SMSS J031300.36-670839.3 | 13.6 billion years[3] | 6000 ly | Milky Way Galactic Halo or Globular Clusters |
| BD +17° 3248 | 13.8 ± 4 billion years[4] | 968 ly | Milky Way Galactic Halo |
| HD 140283 or the Methuselah Star | 14.46 ± 0.8 billion years[5] | 190 ly | Milky Way, 19° north of Galactic Centre, closer than the Galactic Bulge |
| J173823.38-145701.1[6] | 13.2 Gy or more[7] | 28000 ly (8.5 kpc) | Milky Way bulge |
| J182048.26-273329.2[6] | 13.2 Gy or more[7] | 20000 ly (6.0 kpc) | Milky Way bulge |
| J183744.90-280831.1[6] | 13.2 Gy or more[7] | 57400 ly (17.6 kpc) | Milky Way bulge |
| J183647.89-274333.1[6] | 13.2 Gy or more[7] | 22000 ly (6.6 kpc) | Milky Way bulge |
| J183812.72-270746.3[6] | 13.2 Gy or more[7] | 40100 ly (12.3 kpc) | Milky Way bulge |
| J183719.09-262725.0[6] | 13.2 Gy or more[7] | 32600 ly (10.0 kpc) | Milky Way bulge |
| J184201.19-302159.6[6] | 13.2 Gy or more[7] | 31000 ly (9.6 kpc) | Milky Way bulge |
| J184656.07-292351.5[6] | 13.2 Gy or more[7] | 31000 ly (9.5 kpc) | Milky Way bulge |
| J181406.68-313106.1[6] | 13.2 Gy or more[7] | 30000 ly (9.3 kpc) | Milky Way bulge |
| J181317.69-343801.9[6] | 13.2 Gy or more[7] | 21000 ly (6.5 kpc) | Milky Way bulge |
| J181219.68-343726.4[6] | 13.2 Gy or more[7] | 26000 ly (8.0 kpc) | Milky Way bulge |
| J181609.62-333218.7[6] | 13.2 Gy or more[7] | 33900 ly (10.4 kpc) | Milky Way bulge |
| J181634.60-340342.5[6] | 13.2 Gy or more[7] | 34200 ly (10.5 kpc) | Milky Way bulge |
| J175544.54-392700.9[6] | 13.2 Gy or more[7] | 44000 ly (13.5 kpc) | Milky Way bulge |
| J175455.52-380339.3[6] | 13.2 Gy or more[7] | 44000 ly (13.5 kpc) | Milky Way bulge |
| J175746.58-384750.0[6] | 13.2 Gy or more[7] | 30000 ly (9.1 kpc) | Milky Way bulge |
| J181736.59-391303.3[6] | 13.2 Gy or more[7] | 51200 ly (15.7 kpc) | Milky Way bulge |
| J181505.16-385514.9[6] | 13.2 Gy or more[7] | 16000 ly (5.0 kpc) | Milky Way bulge |
| J181921.64-381429.0[6] | 13.2 Gy or more[7] | 36500 ly (11.2 kpc) | Milky Way bulge |
| J175722.68-411731.8[6] | 13.2 Gy or more[7] | 40400 ly (12.4 kpc) | Milky Way bulge |
| J175021.86-414627.1[6] | 13.2 Gy or more[7] | 13000 ly (4.1 kpc) | Milky Way bulge |
| J175636.59-403545.9[6] | 13.2 Gy or more[7] | 32000 ly (9.8 kpc) | Milky Way bulge |
| J175433.19-411048.9[6] | 13.2 Gy or more[7] | 18000 ly (5.6 kpc) | Milky Way bulge |
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.[8]
References
- Schlaufman, Kevin C.; Thompson, Ian B.; Casey, Andrew R. (5 November 2018). "An Ultra Metal-poor Star Near the Hydrogen-burning Limit". The Astrophysical Journal. 867 (2): 98. arXiv:1811.00549. Bibcode:2018ApJ...867...98S. doi:10.3847/1538-4357/aadd97.
- News Staff (6 November 2018). "One of Milky Way's Oldest Stars Discovered". SciNews.com. Retrieved 11 November 2018.
- 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. hdl:2299/19217. PMID 26560034.
- Tumlinson, Jason (2009-12-22). "Chemical Evolution in Hierarchical Models of Cosmic Structure. II. The Formation of the Milky Way Stellar Halo and the Distribution of the Oldest stars". The Astrophysical Journal. 708 (2): 1398–1418. arXiv:0911.1786. doi:10.1088/0004-637X/708/2/1398.
- Rennan Barkana (1 March 2018). "Possible interaction between baryons and dark-matter particles revealed by the first stars". Nature. 555 (7694): 71–74. arXiv:1803.06698. Bibcode:2018Natur.555...71B. doi:10.1038/nature25791. PMID 29493590.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.