NGC 2859

NGC 2859
NGC 2859
	NGC 2859 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation	Leo Minor
Right ascension	09h 24m 18.549s
Declination	+34° 30′ 48.16″
Redshift	1687 ± 8 km/s
Distance	82.8 Mly (25.4 Mpc)
Apparent magnitude (V)	11.8
Characteristics
Type	(R)SB(r)0+
Apparent size (V)	4′.3 × 3′.8
Notable features	Double barred
Other designations
	UGC 5001, PGC 26649

NGC 2859 is a barred lenticular galaxy located some 83^[3] million light years away in the constellation Leo Minor. The morphological classification is (R)SB(r)0⁺,^[4] where the S0⁺ notation indicates a well-defined physical structure that is lacking in visible spiral arms. It has a strong bar (B) of the "ansae" type, which means it grows brighter or wider toward the tips. A faint, secondary bar is positioned at nearly a right angle to the main bar. These features are surrounded by a weak inner ring (r) that appears diffuse. The outer region of the galaxy hosts a prominent, detached ring (R) that includes a series of blue-hued knots along the eastern side.^[4]

The central supermassive black hole is an estimated 105 million times the mass of the Sun. The nucleus is tentatively classified as a transition type T2:,^[3] with no indication of activity.^[5]

References[]

^ ^a ^b 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.
^ ^a ^b ^c ^d Jet Propulsion Laboratory, California Institute of Technology. "Results for NGC 2859". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration. Retrieved 2006-11-21.
^ ^a ^b ^c Richings, A. J.; et al. (August 2011), "The connection between radio loudness and central surface brightness profiles in optically selected low-luminosity active galaxies", Monthly Notices of the Royal Astronomical Society, 415 (3): 2158–2172, arXiv:1104.1053, Bibcode:2011MNRAS.415.2158R, doi:10.1111/j.1365-2966.2011.18845.x, S2CID 59476838.
^ ^a ^b ^c Buta, Ronald J.; Corwin, Harold G.; Odewahn, Stephen C. (2007), Atlas of Galaxies, Cambridge University Press, p. 118, ISBN 978-0521820486.
^ de Lorenzo-Cáceres, A.; et al. (May 2013), "Distinct stellar populations in the inner bars of double-barred galaxies", Monthly Notices of the Royal Astronomical Society, 431 (3): 2397–2418, arXiv:1302.5701, Bibcode:2013MNRAS.431.2397D, doi:10.1093/mnras/stt334, S2CID 118502022.