List of oldest stars

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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[edit]

  1. ^ 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.
  2. ^ News Staff (6 November 2018). "One of Milky Way's Oldest Stars Discovered". SciNews.com. Retrieved 11 November 2018.
  3. ^ 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.
  4. ^ 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
  5. ^ 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.
  6. ^ a b c d e f g h i j k l m n o p q r s t u v w 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.
  7. ^ a b c d e f g h i j k l m n o p q r s t u v w 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.
  8. ^ 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.