NGC 6251 is an active supergiant elliptical radio galaxy in the constellation Ursa Minor, and is more than 340 million light-years away from Earth. The galaxy has a Seyfert 2 active galactic nucleus,[3] and is one of the most extreme examples of a Seyfert galaxy. This galaxy may be associated with gamma-ray source 3EG J1621+8203, which has high-energy gamma-ray emission.[3] It is also noted for its one-sided radio jet—one of the brightest known—discovered in 1977.[4] The supermassive black hole at the core has a mass of (5.9±2.0)×108M☉.[5]
^Perley, R. A.; Bridle, A. H.; Willis, A. G. (1984). "High-resolution VLA Observations of the Radio Jet in NGC 6251". Astrophysical Journal Supplement Series. 54: 291–334. Bibcode:1984ApJS...54..291P. doi:10.1086/190931.
^Graham, Alister W. (November 2008), "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values", Publications of the Astronomical Society of Australia, 25 (4): 167–175, arXiv:0807.2549, Bibcode:2008PASA...25..167G, doi:10.1071/AS08013, S2CID 89905.
External linksedit
Media related to NGC 6251 at Wikimedia Commons
www.jb.man.ac.uk/atlas/
Wikisky image of NGC 6251
Hubble Finds a Bare Black Hole Pouring Out Light (Probing the heart of the active galaxy NGC 6251—September 10, 1997)
6251, active, supergiant, elliptical, radio, galaxy, constellation, ursa, minor, more, than, million, light, years, away, from, earth, galaxy, seyfert, active, galactic, nucleus, most, extreme, examples, seyfert, galaxy, this, galaxy, associated, with, gamma, . NGC 6251 is an active supergiant elliptical radio galaxy in the constellation Ursa Minor and is more than 340 million light years away from Earth The galaxy has a Seyfert 2 active galactic nucleus 3 and is one of the most extreme examples of a Seyfert galaxy This galaxy may be associated with gamma ray source 3EG J1621 8203 which has high energy gamma ray emission 3 It is also noted for its one sided radio jet one of the brightest known discovered in 1977 4 The supermassive black hole at the core has a mass of 5 9 2 0 108 M 5 NGC 6251Hubble image of the heart of the active galaxy NGC 6251Observation data J2000 epoch ConstellationUrsa MinorRight ascension16h 32m 31 9700s 1 Declination 82 32 16 400 1 Redshift0 02471 1 Distance340 million light years 2 Apparent magnitude V 14 3 3 CharacteristicsTypeE 1 Apparent size V 1 82 X1 55 Other designationsNGC 6251 UGC 10501 LEDA 58472 6C 1636 8239 QSO B1637 826References edit a b c d NASA IPAC Extragalactic Database Results for NGC 6251 Retrieved 2006 10 26 Distance and Length Online Unit Converter com Archived from the original on 2010 03 30 Retrieved 2010 03 29 a b c SIMBAD Perley R A Bridle A H Willis A G 1984 High resolution VLA Observations of the Radio Jet in NGC 6251 Astrophysical Journal Supplement Series 54 291 334 Bibcode 1984ApJS 54 291P doi 10 1086 190931 Graham Alister W November 2008 Populating the Galaxy Velocity Dispersion Supermassive Black Hole Mass Diagram A Catalogue of Mbh s Values Publications of the Astronomical Society of Australia 25 4 167 175 arXiv 0807 2549 Bibcode 2008PASA 25 167G doi 10 1071 AS08013 S2CID 89905 External links edit nbsp Media related to NGC 6251 at Wikimedia Commons www jb man ac uk atlas Wikisky image of NGC 6251 Hubble Finds a Bare Black Hole Pouring Out Light Probing the heart of the active galaxy NGC 6251 September 10 1997 nbsp nbsp This elliptical galaxy article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title NGC 6251 amp oldid 1154744828, wikipedia, wiki, book, books, library,
