SMSS J215728.21-360215.1

SMSS J215728.21-360215.1
Observation data (Epoch )
Constellation	Piscis Austrinus
Right ascension	21^h 57^m 28.21^s
Declination	−36° 02′ 15.1″
Redshift	4.75[1] or 4.692[2]
Other designations
J2157-3602
See also: Quasar, List of quasars

SMSS J215728.21-360215.1, commonly known as J2157-3602, is one of the fastest growing black holes and one of the most powerful quasars known to exist as of 2021^[update]. The quasar is located at redshift 4.75,^[1] corresponding to a comoving distance of 2.5×10¹⁰ ly from Earth and to a light-travel distance of 1.25×10¹⁰ ly. It was discovered with the SkyMapper telescope at Australian National University's Siding Spring Observatory, announced in May 2018. It has an intrinsic bolometric luminosity of 6.95×10¹⁴ L_☉ (2.66×10⁴¹ W) and an absolute magnitude of -32.36.^{[1][3][4][5][6]}

In July 2020 the black hole associated with the quasar was reported to be 34 billion solar masses, based on a study published in Monthly Notices of the Royal Astronomical Society.^[7][8][2]

References

1. Wolf, Christian; Bian, Fuyan; Onken, Christopher; Schmidt, Brian; Tisserand, Patrick; Alonzi, Noura; Hon, Wei Jeat; Tonry, John (May 11, 2018). "Discovery of the most ultra-luminous QSO using Gaia, SkyMapper and WISE". Publications of the Astronomical Society of Australia. 35. arXiv:1805.04317. Bibcode:2018PASA...35...24W. doi:10.1017/pasa.2018.22. S2CID 55363916.
2. Christopher A Onken; Fuyan Bian; Xiaohui Fan; Feige Wang; Christian Wolf; Jinyi Yang (August 2020), "thirty-four billion solar mass black hole in SMSS J2157–3602, the most luminous known quasar", Monthly Notices of the Royal Astronomical Society, 496 (2): 2309–2314, arXiv:2005.06868, Bibcode:2020MNRAS.496.2309O, doi:10.1093/mnras/staa1635
3. Overbye, Dennis (May 17, 2018). "A Very Hungry Black Hole Is Found, Gorging on Stars". The New York Times. Retrieved May 25, 2018.
4. Paoletta, Rae (May 15, 2018). "Newly Discovered 'Monster' Black Hole Has a Terrifying Diet". Yahoo News. Retrieved May 25, 2018.
5. Scalise, Joseph (May 16, 2018). "Newly discovered black hole is fastest growing on record". The Space Reporter. Archived from the original on July 5, 2020. Retrieved May 15, 2018.
6. Papadopoulos, Loukia (May 21, 2018). "Fastest Growing Black Hole Ever Has Been Discovered by Astronomers". Interesting Engineering. Retrieved May 25, 2018.
7. Eric Mack (July 2, 2020), Monstrous black hole found devouring about one sun every day, CNet, The yawning void known as J2157 eats stars like ours for breakfast. Perhaps every breakfast.
8. Phil Plait (Jul 1, 2020), "IN THE DISTANT UNIVERSE A SUPERMASSIVE BLACK HOLE EATS A SUN *A DAY*", Syfy Wire: Bad Astronomy, Syfy