Related Research Articles
A quasar is an extremely luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by a supermassive black hole with a mass ranging from millions to tens of billions of solar masses, surrounded by a gaseous accretion disc. Gas in the disc falling towards the black hole heats up and releases energy in the form of electromagnetic radiation. The radiant energy of quasars is enormous; the most powerful quasars have luminosities thousands of times greater than that of a galaxy such as the Milky Way. Quasars are usually categorized as a subclass of the more general category of AGN. The redshifts of quasars are of cosmological origin.
3C 273 is a quasar located at the center of a giant elliptical galaxy in the constellation of Virgo. It was the first quasar ever to be identified and is the visually brightest quasar in the sky as seen from Earth, with an apparent visual magnitude of 12.9. The derived distance to this object is 749 megaparsecs. The mass of its central supermassive black hole is approximately 886 million times the mass of the Sun.
3C 279 is an optically violent variable quasar (OVV), which is known in the astronomical community for its variations in the visible, radio and X-ray bands. The quasar was observed to have undergone a period of extreme activity from 1987 until 1991. The Rosemary Hill Observatory (RHO) started observing 3C 279 in 1971, the object was further observed by the Compton Gamma Ray Observatory in 1991, when it was unexpectedly discovered to be one of the brightest gamma ray objects in the sky. It is also one of the brightest and most variable sources in the gamma ray sky monitored by the Fermi Gamma-ray Space Telescope. It was used as a calibrator source for Event Horizon Telescope observations of M87* that resulted in the first image of a black hole.
3C48 is a quasar discovered in 1960; it was the second source conclusively identified as such.
3C 295 is a narrow-line radio galaxy located in the constellation of Boötes. With a redshift of 0.464, it is approximately 5 billion light-years from Earth. At time of the discovery of its redshift in 1960, this was the remotest object known.
3C 212 is a quasar located in the constellation Cancer. At redshift 1.048, it is one of the luminous and distant AGNs observed.
3C 191 is a quasar located in the constellation Cancer. It is located at redshift z = 1.95 and is hosted by an elliptical galaxy. The quasar contains a radio jet known to contain a high rotation measure with a thin shell configuration created in a form of wind inside the central regions.
3C 47 is a Seyfert galaxy / lobe-dominated quasar located in the constellation Pisces. It was the first quasar found with the classic double radio-lobe structure.
3C 35 is a giant radio galaxy with an active galactic nucleus (AGN). It is classified as a Fanaroff & Riley type II radio galaxy. It is located in the constellation Cassiopeia.
3C 79 is a Seyfert Galaxy located in the constellation Aries. The extended emission-line region (EELR) is almost certainly photoionized by the hidden quasar.
3C 215 is a Seyfert galaxy/Quasar located in the constellation Cancer.
3C 219 is a Seyfert galaxy with a quasar-like appearance located in the constellation Ursa Major. This galaxy's radio jets are not detectable between the core and the outer radio lobes.
3C 223 is a Seyfert galaxy located in the constellation of Leo Minor. It hosts a Type 2 quasar nucleus, found to be radio-loud with a rare, Compton-thick active galactic nucleus.
3C 249.1 is a Seyfert galaxy located in the constellation Draco. It hosts a powerful radio source and is located at redshift 0.3115, with a peculiar radio structure. One of its radio lobes is classified as having a Fanaroff-Riley classification Type II, while the other lobe has no features nor containing hotspots.
3C 268.3 is a Seyfert galaxy/quasar located in the constellation Ursa Major.
3C 299 is a radio galaxy/quasar located in the constellation Boötes.
3C 303 is a Seyfert galaxy with a quasar-like appearance located in the constellation Boötes.
3C 286, also known by its position as 1328+307 or 1331+305, is a quasar at redshift 0.8493 with a radial velocity of 164,137 km/s. It is part of the Third Cambridge Catalogue of Radio Sources.
3C 371 is a BL Lac object located in the constellation Draco. With a redshift of 0.051, this active galaxy is about 730 million light-years away.
3C 147 (B0538+498) is a compact steep-spectrum (CSS) quasar that was discovered in 1964. It is located in the constellation Auriga not far in the sky from the 5th magnitude star Omicron Aurigae.
References
- 1 2 3 4 5 6 "3C 9". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2019-11-20.
- 1 2 3 4 "NASA/IPAC Extragalactic Database". Results for 3C 009. Retrieved 2010-04-20.
- ↑ "3C 9". XJET: X-Ray Emission from Extragalactic Radio Jets. 2009-03-26. Retrieved 2010-04-06.
- ↑ Time magazine, The Quasi-Quasars, Friday, June 18, 1965