2MASS J22132050−5137385 is a contender for the oldest star in the known universe, with an approximated age of 13.6±2.6 billion years. It is located within the Milky Way galaxy, between 6,230 and 6,820 light years away from Earth in the constellation of Grus. It has a mass 0.80±0.08 that of the Sun.[4] Due to its age, it is likely among the first stars from reionization (the stellar dawn), ending the Dark Ages about 370,000 years after the Big Bang.[5]
References
- ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034.
Constellation record for this object at VizieR.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b "2MASS J22132050-5137385". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-04-05.
- ^ a b c Roederer, Ian U.; Beers, Timothy C.; Hattori, Kohei; Placco, Vinicius M.; Hansen, Terese T.; Ezzeddine, Rana; Frebel, Anna; Holmbeck, Erika M.; Sakari, Charli M. (2024-08-01). "The R-Process Alliance: 2MASS J22132050–5137385, the Star with the Highest-known r-process Enhancement at [Eu/Fe] = +2.45". The Astrophysical Journal. 971 (2): 158. arXiv:2406.02691. Bibcode:2024ApJ...971..158R. doi:10.3847/1538-4357/ad57bf. ISSN 0004-637X.
- ^ Roederer, Ian (February 2024). "The most highly r-process-enhanced star known reveals new insight into the dilution and yields of r-process material in the early universe". American Astronomical Society Meeting Abstracts. 243 (2): 350.05. Bibcode:2024AAS...24335005R.
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