NGC 2911 is apeculiarlenticular galaxy in the constellationLeo. The galaxy lies about 145 millionlight years away from Earth, which means, given its apparent dimensions, that NGC 2911 is approximately 165,000 light years across. It was discovered byWilliam Herschel on March 11, 1784.[3]
The galaxy features dust lanes.[4] The kinematic axis of the molecular gas of the galaxy isn't aligned with the stellar one, indicating it is of external origin.[5] The nucleus of the galaxy has been found to beactive and it is categorised as a type 2LINER.[6] The most accepted theory for the energy source of active galactic nuclei is the presence of anaccretion disk around asupermassive black hole. The supermassive black hole in the nucleus of NGC 5953 is estimated to have a mass of2.7×108M☉ based on stellarvelocity dispersion.[7] A one-sidedjet measuring about half parsec in length is visible in radiowaves.[8][9]
NGC 2911 is the foremost member of agalaxy group known asNGC 2911 group orLGG 177. Other members of the group include the galaxiesNGC 2912,NGC 2913,NGC 2914, andNGC 2939.[10] NGC 2912 lies at a distance of 1.3 arcminutes while NGC 2914 lies at a distance of 4.8 arcminutes.[4][11]NGC 2919 appears next to the group but it isn't a member of it. A bit further away from the NGC 2911 group liesNGC 2872 and its group, the UGC 5189 group and the CGCG 063-066 group.[12]
^abSandage, A., Bedke, J. (1994),The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
^Müller-Sánchez, F.; Prieto, M. A.; Mezcua, M.; Davies, R. I.; Malkan, M. A.; Elitzur, M. (20 January 2013). "The Central Molecular Gas Structure in Liners with Low-Luminosity Active Galactic Nuclei: Evidence for Gradual Disappearance of the Torus".The Astrophysical Journal.763 (1): L1.arXiv:1212.1162.Bibcode:2013ApJ...763L...1M.doi:10.1088/2041-8205/763/1/L1.
^Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search forDwarf Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies".The Astrophysical Journal Supplement Series.112 (2):315–390.arXiv:astro-ph/9704107.Bibcode:1997ApJS..112..315H.doi:10.1086/313041.
^Walsh, Jonelle L.; Barth, Aaron J.; Ho, Luis C.; Filippenko, Alexei V.; Rix, Hans-Walter; Shields, Joseph C.; Sarzi, Marc; Sargent, Wallace L. W. (1 October 2008). "HUBBLE SPACE TELESCOPE SPECTROSCOPIC OBSERVATIONS OF THE NARROW-LINE REGION IN NEARBY LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI".The Astronomical Journal.136 (4):1677–1702.arXiv:0808.0914.Bibcode:2008AJ....136.1677W.doi:10.1088/0004-6256/136/4/1677.
