Astronomy:QSO J0931+3204
| QSO J0931+3204 | |
|---|---|
 DESI Legacy DR10 image of QSO J0931+3204 | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 09h 31m 39.04s |
| Declination | +32° 04' 00.08" |
| Redshift | 0.22551 |
| Helio radial velocity | 60138 |
| Distance | 3.2647 bly (1,000.97 mpc) |
| Apparent magnitude (V) | 18.76 |
| Characteristics | |
| Type | E? |
| Size | 865,600 ly (265.38 kpc) |
| Other designations | |
| LEDA 1978568, 2MASX J09313900+3204006 | |
QSO J0931+3204 is a type I seyfert galaxy, quasar, and elliptical galaxy in the constellation of Leo.[1] The galaxy is at redshift z = 0.022551, equivalent to roughly 3.265 billion light years (1,000.97 megaparsecs) away and has an apparent visual magnitude of 18.76.[1][2] It was discovered in 2003 in the HyperLEDA survey of over 950,000 galaxies.[3]
Physical properties
QSO J0931+3204 is a large elliptical galaxy and is in fact one of the largest galaxies discovered.[1] The galaxy is 865,600 light years (265.38 kiloparsecs) across based on a distance of 3.265 billion light years (1,000.97 megaparsecs) and an angular diameter of 54.8 arcsecs.[2]
In the galactic center of QSO J0931+3204 is an extremely luminous quasar that has a luminosity of 2.04e+38 watts equal to 533.6 billion L☉.[4] The galactic center contains a massive 100 million M☉ central black hole which is accreting on huge amounts of matter, which is ejecting mass amounts of gas outside the galaxy forming radio lobes.[4] It is possible that QSO J0931+3204 has binary central black holes (BBHs), however this is unlikely.[5]
In 2020, it was discovered in the SAGAN survey that QSO J0931+3204 generated a 14.1 million light year (4.325 megaparsec) radio structure based on an angular diameter of 19.22 arcmin.[6] At the time of discovery, QSO J0931+3204 was the largest giant radio quasar (GRQ) ever discovered however a newer 2023 article discovered a larger giant radio quasar designated FBQS J1318+2626 spanning 4.622 megaparsecs.[7]
See also
- List of largest galaxies, includes QSO J0931+3204.
- 3C 236, similar-sized radio galaxy.
References
- ↑ 1.0 1.1 1.2 "SIMBAD Results for QSO J0931+3204". https://simbad.u-strasbg.fr/simbad/sim-id?Ident=QSO+J0931%2B3204&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
- ↑ 2.0 2.1 "NED Results for QSO J0931+3204". https://ned.ipac.caltech.edu/byname?objname=SDSS+J093139.05%2B320400.1&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1.
- ↑ Paturel, G.; Petit, C.; Prugniel, Ph.; Theureau, G.; Rousseau, J.; Brouty, M.; Dubois, P.; Cambrésy, L. (2003). "HYPERLEDA. I. Identification and designation of galaxies". Astronomy and Astrophysics 412: 45. doi:10.1051/0004-6361:20031411. Bibcode: 2003A&A...412...45P. https://ui.adsabs.harvard.edu/abs/2003A%26A...412...45P/abstract. Retrieved 2025-11-30.
- ↑ 4.0 4.1 Coziol, Roger (2017). "What sparks the radio-loud phase of nearby quasars?". Monthly Notices of the Royal Astronomical Society 466: 921–944. doi:10.1093/mnras/stw3164.
- ↑ Tsalmantza, Paraskevi (2011). "A Systematic Search for Massive Black Hole Binaries in the Sloan Digital Sky Survey Spectroscopic Sample". The Astrophysical Journal 738 (1): 20. doi:10.1088/0004-637X/738/1/20. Bibcode: 2011ApJ...738...20T.
- ↑ Dabhade, Pratik (2020). "Search and analysis of giant radio galaxies with associated nuclei (SAGAN)". Astronomy & Astrophysics 642: A153. doi:10.1051/0004-6361/202038344.
- ↑ Oei, Martijn (2023). "Measuring the giant radio galaxy length distribution with the LoTSS". Astronomy & Astrophysics 672: A163. doi:10.1051/0004-6361/202243572. Bibcode: 2023A&A...672A.163O.
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