J0313–1806 is the most distant known
quasar
A quasar is an extremely Luminosity, luminous active galactic nucleus (AGN). It is pronounced , and sometimes known as a quasi-stellar object, abbreviated QSO. This emission from a galaxy nucleus is powered by a supermassive black hole with a m ...
at z = 7.64. In January 2021, it was identified as the most
redshift
In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength and simultaneous increase in f ...
ed (highest ''z'') known quasar, with the oldest known
supermassive black hole
A supermassive black hole (SMBH or sometimes SBH) is the largest type of black hole, with its mass being on the order of hundreds of thousands, or millions to billions of times the mass of the Sun (). Black holes are a class of astronomical obj ...
(SMBH) at solar masses.
The 2021 announcement paper described it as "the most massive SMBH at ''z'' > 7".
One of the 2021 paper authors, Feige Wang, said that the existence of a supermassive black hole so early in the existence of the Universe posed problems for the current
theories of formation since "black holes created by the very first massive stars could not have grown this large in only a few hundred million years".
[ The redshift z = 7.642 corresponds to an age of about 600 million years.
]
See also
*Direct collapse black hole
Direct collapse black holes are high-mass black hole seeds, putatively formed within the redshift range 15, when the Universe was about 100-250 million years old. Unlike seeds formed from the first population of stars (also known as St ...
, a process by which black holes may form less than a few hundred million years after the Big Bang
* List of the most distant astronomical objects
This article documents the most distant astronomical objects discovered and verified so far, and the time periods in which they were so classified.
For comparisons with the light travel distance of the astronomical objects listed below, the age of ...
* List of quasars
This article contains lists of quasars. More than a million quasars have been observed, so any list on Wikipedia is necessarily a selection of them.
Proper naming of quasars are by Catalogue Entry, Qxxxx±yy using B1950 coordinates, or QSO Jxxxx ...
* PSO J172.3556+18.7734
* ULAS J1342+0928
ULAS J1342+0928 is the second-most distant known quasar detected and contains the second-most distant and oldest known supermassive black hole, at a reported redshift of z = 7.54. The ULAS J1342+0928 quasar is located in the Boötes, Boötes con ...
References
Sources
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Further reading
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{{DEFAULTSORT:J0313-1806
Astronomical objects discovered in 2021
Supermassive black holes
Quasars
Eridanus (constellation)