Pōniuāʻena
Pōniuāʻena /ˌpoʊniuːɑːˈɛnə/ (J100758.264+211529.207 or J1007+2115) is the second most-distant quasar known, with a measured redshift of z = 7.52 or a lookback time of 13.02 billion years.[2] Its 1.5 billion–solar mass black hole is the most distant known black hole with a mass of over one billion solar masses, and models indicate it must have formed not later than 100 million years after the Big Bang, before reionization.[3] Its discovery was announced in June 2020.[4] Only the quasar ULAS J1342+0928 (z = 7.54) is known to be more distant.[3]
| SDSS J1007+2115 | |
|---|---|
| Observation data (Epoch J2000.0) | |
| Constellation | Leo |
| Right ascension | 10h 07m 58.264s |
| Declination | +21° 15′ 29.207″ |
| Redshift | 7.52[1] |
| Distance | 13.02×109 light-years (3.99×109 parsecs) |
| Other designations | |
| SDSS J100758.264+211529.207, Pōniuāʻena | |
| See also: Quasar, List of quasars | |
The quasar was observed by telescopes in the U.S. state of Hawaii and named by Hawaiian language experts at ʻImiloa Astronomy Center; the name pōniu-ā-ʻena [ˌpoːnijuwaːˈʔɛnə] "evokes the unseen spinning source of creation, surrounded by brilliance."[5]
References
- Yang et al. 2020
- Monster Black Hole Found in the Early Universe, National Optical-Infrared Astronomy Research Laboratory, June 25, 2020
- Brooks Hays (June 25, 2020). "Astronomers find massive black hole in the early universe". UPI.
- Monster black hole found in the early universe, Keck Observatory, June 25, 2020 – via Science Daily,
The second-most distant quasar ever discovered now has a Hawaiian name
- Astronomers and immersion kumu announce newly-named discovery: Pōniuāʻena, ʻImiloa Astronomy Center, June 25, 2020
Further reading
- Yang, Jinyi; Wang, Feige; Fan, Xiaohui; Hennawi, Joseph F.; Davies, Frederick B.; Yue, Minghao; et al. (2020). "Pōniuā'ena: A luminous z = 7.5 quasar hosting a 1.5 billion solar mass black hole". arXiv:2006.13452 [astro-ph.GA].