NGC 383 is a double

radio galaxy A radio galaxy is a galaxy with giant regions of radio emission extending well beyond its visible structure. These energetic radio lobes are powered by jets from its active galactic nucleus. They have luminosities up to 1039 W at radio wav ...

with a

quasar A quasar ( ) is an extremely Luminosity, luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by accretion onto a supermassive black hole with a mass rangi ...

-like appearance located in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The first constellati ...

Pisces. It was discovered by German-British astronomer

William Herschel Frederick William Herschel ( ; ; 15 November 1738 – 25 August 1822) was a German-British astronomer and composer. He frequently collaborated with his younger sister and fellow astronomer Caroline Herschel. Born in the Electorate of Hanover ...

on 12 September 1784. It is listed as Arp 331 in Halton Arp's Atlas of Peculiar Galaxies. Recent discoveries by the National Radio Astronomy Observatory in 2006 reveal that NGC 383 is being bisected by high energy

relativistic jets An astrophysical jet is an astronomy, astronomical phenomenon where outflows of Ionization, ionised matter are emitted as extended beams along the rotation, axis of rotation. When this greatly accelerated matter in the beam approaches the speed of ...

traveling at relatively high fractions of the speed of light. The relativistic electrons in the jets are detected as

synchrotron radiation Synchrotron radiation (also known as magnetobremsstrahlung) is the electromagnetic radiation emitted when relativistic charged particles are subject to an acceleration perpendicular to their velocity (). It is produced artificially in some types ...

in the x-ray and radio wavelengths. The focus of this intense energy is the galactic center of NGC 383. The relativistic electron jets detected as

extend for several thousand parsecs and then appear to dissipate at the ends in the form of streamers or filaments. There are four other nearby galaxies NGC 379, NGC 380, NGC 385, and NGC 384 which are suspected of being closely associated with NGC 383, as well as several other galaxies at relatively close distance. Two

supernova A supernova (: supernovae or supernovas) is a powerful and luminous explosion of a star. A supernova occurs during the last stellar evolution, evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion ...

e have been observed in NGC 383: * SN 2015ar ( type Ia, mag. 18.8) was discovered by E. Conseil and G. Arlic on 11 November 2015. * SN 2017hle (type Ia, mag. 18) was discovered by Xingming Observatory Sky Survey (XOSS) on 18 October 2017. Radio galaxy 3C31

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External links

*
3C31 = B0104+321
(Alan Bridle / 18 June 2008)

* Wikisk
image
of NGC 383 {{DEFAULTSORT:NGC 0383 Radio galaxies 0383 00689 31 Pisces (constellation) 17840912 Lenticular galaxies Discoveries by William Herschel +05-03-053

331 __NOTOC__ Year 331 ( CCCXXXI) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Bassus and Ablabius (or, less frequently, year 1084 ''Ab urbe condita''). The denomination ...

See also

References

External links