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3C 279 (also known as 4C–05.55, NRAO 413, and PKS 1253–05) 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.[2] The quasar was observed to have undergone a period of extreme activity from 1987 until 1991.[3] The Rosemary Hill Observatory (RHO) started observing 3C 279 in 1971,[3] 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.[4] 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.[5]
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3C 279 quasar jet and its motion over the course of one week as observed by the EHT in April 2017
Alternative View of Computer Animation of Quasar 3C 279
Computer Animation of Quasar 3C 279
Simulation Black Holes : Artist's impression of the quasar 3C 279
Artist's impression of the quasar 3C 279
Transcription
Observations
Apparent superluminal motion was detected during observations first made in 1973 in a jet of material departing from the quasar, though it should be understood that this effect is an optical illusion caused by naive estimations of the speed, and no truly superluminal motion is occurring.[6]
16 June 2015, the 3C 279 had a large gamma-ray outburst, believed to be caused by injection of high-speed electrons in central, high-density region.[7]
Further observations with the Event Horizon Telescope during April 2017 provided a high level of detail to the radio jet, with a resolution as small as 20 micro-arcseconds. They indicated a bent or rotating jet shaped by shock waves.[8]
Gallery
Representative images of 3C 279 from EHT observations
^ abJ. R. Webb; M. T. Carini; S. Clements; S. Fajardo; P. P. Gombola; R. J. Leacock; et al. (1990). "The 1987-1990 optical outburst of the OVV quasar 3C 279". Astronomical Journal. 100: 1452–1456. Bibcode:1990AJ....100.1452W. doi:10.1086/115609.
Media related to 3C 279 at Wikimedia Commons
This page was last edited on 18 August 2023, at 22:14