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NGC 4293 is a lenticular galaxy in the northern constellation of Coma Berenices. It was discovered by English astronomer William Herschel on March 14, 1784, who described it as "large, extended, resolvable, 6 or 7′ long". This galaxy is positioned to the north-northwest of the star 11 Comae Berenices and is a member of the Virgo Cluster of galaxies.[5] It is assumed to lie at the same distance as the Virgo Cluster itself: around 54 million light years away.[4] The galaxy spans an apparent area of 5.3 × 3.1 arc minutes.[5]

NGC 4293
Partial image of NGC 4293 taken by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension12h 21m 12.891s[1]
Declination+18° 22′ 56.64″[1]
Redshift0.002977[2]
Helio radial velocity893[3]
Distance54 Mly (16.5 Mpc)[4]
Group or clusterVirgo Cluster
Apparent magnitude (V)10.4[5]
Characteristics
Type(R)SB(s)0/a[6]
Apparent size (V)5.293′ × 1.800′[1]
Other designations
2MASX J12211289+1822566, IRAS 12186+1839, LEDA 39907, UGC 7405, UZC J122112.6+182256, Z 99-23, VCC 460.[7]

The morphological classification of NGC 4293 is (R)SB(s)0/a, with the SB0/a indicating this has just distinguishable tightly wound spiral arms with a bar structure at the nucleus. An '(s)' notation means that this galaxy does not have a ring-like structure around the nucleus.[6][8] Star formation within NGC 4293 is only taking place within a confined region at the center of the galaxy.[9] The outer stellar disk of the galaxy appears disturbed, suggesting some form of gravitational interaction.[10]

This is a common type of active galaxy known as a LINER, which means that the optical spectrum is dominated by emission lines from gases in low energy ionization states. The activity may be the result of a supermassive black hole (SMBH) in the nucleus that is undergoing a low rate of matter accretion. The estimated mass of such an SMBH is 5.9×107 M⊙.[11] Radio emission from thermal activity has been detected from the proximity of this object.[12]




References


  1. Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131: 1163–1183. doi:10.1086/498708. ISSN 0004-6256.
  2. Kochanek, C. S.; et al. (October 2001), "The K-Band Galaxy Luminosity Function", The Astrophysical Journal, 560 (2): 566–579, arXiv:astro-ph/0011456, Bibcode:2001ApJ...560..566K, doi:10.1086/322488, S2CID 119420446.
  3. Crook, Aidan C.; et al. (February 2007), "Groups of Galaxies in the Two Micron All Sky Redshift Survey", The Astrophysical Journal, 655 (2): 790–813, arXiv:astro-ph/0610732, Bibcode:2007ApJ...655..790C, doi:10.1086/510201, S2CID 11672751.
  4. Cappellari, Michele; et al. (May 2011), "The ATLAS3D project - I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria", Monthly Notices of the Royal Astronomical Society, 413 (2): 813–836, arXiv:1012.1551, Bibcode:2011MNRAS.413..813C, doi:10.1111/j.1365-2966.2010.18174.x, S2CID 15391206.
  5. O'Meara, Stephen James (2011), Deep-Sky Companions: The Secret Deep, vol. 4, Cambridge University Press, pp. 230–231, ISBN 978-1139500074.
  6. de Vaucouleurs, G.; et al. (1991), "Third reference catalogue of bright galaxies, version 9", The Astronomical Journal, 108: 2128, Bibcode:1994AJ....108.2128C, doi:10.1086/117225, retrieved 2015-11-25.
  7. "NGC 4293". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-11-16.
  8. Keel, William C. (January 2015), Galaxy Classification, University of Alabama, retrieved 2015-11-25.
  9. Falcón-Barroso, J.; et al. (December 2009), "Galaxy Evolution: Emerging Insights and Future Challenges ASP Conference Series", in Jogee, S.; Marinova, I.; Hao, L.; et al. (eds.), Galactic Bulges: the SAURON Perspective, vol. 419, Society of the Pacific, 2009, p. 131, Bibcode:2009ASPC..419..131F.
  10. Cortés, J. R.; et al. (June 2006), "XI IAU Regional Latin American Meeting of Astronomy", in Infante, L.; Rubio, M. (eds.), Stellar and Ionized Gas Kinematics of Peculiar Virgo Cluster Galaxies, vol. 26, Revista Mexicana de Astronomía y Astrofísica, p. 189, arXiv:astro-ph/0602627, Bibcode:2006RMxAC..26Q.189C.
  11. Chiaberge, Marco; et al. (June 2005), "The Hubble Space Telescope View of LINER Nuclei: Evidence for a Dual Population?", The Astrophysical Journal, 625 (2): 716–726, arXiv:astro-ph/0501461, Bibcode:2005ApJ...625..716C, doi:10.1086/429612, S2CID 6676560.
  12. Filho, M. E.; Barthel, P. D.; Ho, L. C. (May 2006), "A radio census of nuclear activity in nearby galaxies", Astronomy and Astrophysics, 451 (1): 71–83, arXiv:astro-ph/0601080, Bibcode:2006A&A...451...71F, doi:10.1051/0004-6361:20054510, S2CID 16640767.




На других языках

[de] NGC 4293

NGC 4293 ist eine Linsenförmige Galaxie mit aktivem Galaxienkern vom Hubble-Typ SB0/a und liegt im Sternbild Haar der Berenike. Die Galaxie ist schätzungsweise 38 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 70.000 Lichtjahren. Unter der Katalognummer VCC 460 ist sie als Mitglied des Virgo-Galaxienhaufens aufgeführt.
- [en] NGC 4293

[ru] NGC 4293

NGC 4293 (другие обозначения — UGC 7405, MCG 3-32-6, ZWG 99.23, VCC 460, IRAS12186+1839, PGC 39907) — галактика в созвездии Волосы Вероники.


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