View source for Astronomy:SMSS J215728.21-360215.1

{{Infobox quasar
| name = SMSS J215728.21-360215.1
| image = 
| caption=
| epoch =
| ra ={{RA|21|57|28.21}}
| dec ={{DEC|-36|02|15.1}}
| constellation name =Piscis Austrinus
| z = 4.75<ref name="Wolf"/> or 4.692<ref name=Onken2020/>
| dist_pc =
| dist_ly =
| type =
| appmag_v =
| size_v =
| notes =
| names = J2157-3602
}}
'''SMSS J215728.21-360215.1''', commonly known as '''J2157-3602''', is one of [[Astronomy:List of most massive black holes|the fastest growing black holes]] and one of [[Astronomy:List of quasars#Extremes|the most powerful quasars]] known to exist {{As of|lc=y|2021}}. The quasar is located at redshift 4.75,<ref name="Wolf"/> corresponding to a [[Astronomy:Comoving and proper distances|comoving distance]] of {{val|2.5e10|ul=ly}} from Earth and to a [[Astronomy:Distance measures (cosmology)#Light-travel distance|light-travel distance]] of {{val|1.25e10|ul=ly}}.  It was discovered with the [[Astronomy:SkyMapper|SkyMapper telescope]] at Australian National University's Siding Spring Observatory, announced in May 2018. It has an intrinsic bolometric luminosity of {{val|6.95e14|ul=Solar luminosity}} ({{val|2.66e41|ul=W}}) and an absolute magnitude of -32.36.<ref name="Wolf">{{Cite journal|last1=Wolf|first1=Christian|last2=Bian|first2=Fuyan|last3=Onken|first3=Christopher|last4=Schmidt|first4=Brian|last5=Tisserand|first5=Patrick|last6=Alonzi|first6=Noura|last7=Hon|first7=Wei Jeat|last8=Tonry|first8=John|date=May 11, 2018|title=Discovery of the most ultra-luminous QSO using Gaia, SkyMapper and WISE|arxiv=1805.04317|journal=[[Organization:Publications of the Astronomical Society of Australia|Publications of the Astronomical Society of Australia]]|volume=35|bibcode=2018PASA...35...24W|doi=10.1017/pasa.2018.22|s2cid=55363916 }}</ref><ref>{{Cite news|url=https://www.nytimes.com/2018/05/17/science/hungry-black-hole.html|title=A Very Hungry Black Hole Is Found, Gorging on Stars|last=Overbye|first=Dennis|date=May 17, 2018|work=The New York Times|access-date=May 25, 2018}}</ref><ref>{{Cite news|url=https://www.yahoo.com/news/newly-discovered-apos-monster-apos-164700567.html|title=Newly Discovered 'Monster' Black Hole Has a Terrifying Diet|last=Paoletta|first=Rae|date=May 15, 2018|work=Yahoo News|access-date=May 25, 2018}}</ref><ref>{{Cite news|url=https://thespacereporter.com/article.php?n=newly-discovered-black-hole-is-fastest-growing-on-record&id=147140|title=Newly discovered black hole is fastest growing on record|last=Scalise|first=Joseph|date=May 16, 2018|work=The Space Reporter|access-date=May 15, 2018|archive-date=July 5, 2020|archive-url=https://web.archive.org/web/20200705014543/https://thespacereporter.com/article.php?n=newly-discovered-black-hole-is-fastest-growing-on-record&id=147140}}</ref><ref>{{Cite news|url=https://interestingengineering.com/fastest-growing-black-hole-ever-has-been-discovered-by-astronomers|title=Fastest Growing Black Hole Ever Has Been Discovered by Astronomers|last=Papadopoulos|first=Loukia|date=May 21, 2018|work=Interesting Engineering|access-date=May 25, 2018}}</ref>

In July 2020 the black hole associated with the quasar was reported to be 34 billion [[Astronomy:Solar mass|solar mass]]es, based on a study published in ''Monthly Notices of the Royal Astronomical Society''.<ref>{{citation|publisher=CNet|title=Monstrous black hole found devouring about one sun every day |quote=The yawning void known as J2157 eats stars like ours for breakfast. Perhaps every breakfast.|author=Eric Mack |date=July 2, 2020|url=https://www.cnet.com/news/monstrous-black-hole-found-devouring-about-one-sun-every-day/}}</ref><ref>{{citation|work=Syfy Wire: Bad Astronomy|publisher=Syfy|title=IN THE DISTANT UNIVERSE A SUPERMASSIVE BLACK HOLE EATS A SUN *A DAY*|author=Phil Plait|date=Jul 1, 2020|url=https://www.syfy.com/syfywire/supermassive-black-hole-eats-a-sun-a-day}}</ref><ref name=Onken2020>{{citation|title= thirty-four billion solar mass black hole in SMSS J2157–3602, the most luminous known quasar |journal=Monthly Notices of the Royal Astronomical Society|author=Christopher A Onken |author2=Fuyan Bian |author3=Xiaohui Fan |author4=Feige Wang |author5=Christian Wolf |author6=Jinyi Yang |date=August 2020|volume=496 |issue=2 |pages=2309–2314 |doi=10.1093/mnras/staa1635|arxiv=2005.06868 |bibcode=2020MNRAS.496.2309O |doi-access=free}}</ref> 

== References ==
{{reflist}}

{{black holes|state=collapsed}}


[[Category:Quasars]]
[[Category:Supermassive black holes]]
[[Category:Piscis Austrinus]]



{{Sourceattribution|SMSS J215728.21-360215.1}}