This galaxy is small and isolated[5] with amorphological classification of SB(r)0+,[6] which indicates a barred spiral (SB) with a ring around the bar (r). Being a lenticular galaxy, it has the large halo of anelliptical galaxy. The disk is inclined at an angle of58°±3° to the line of sight from the Earth, with the major axis aligned along aposition angle of110°±3°.[5] The galaxy has an unusually high mass-to-light ratio, much greater than for a typical spiral galaxy.[5] The distribution of the galaxy's neutral hydrogen forms a clumpy ring with a radius of10.3 kpc, double that of the visible galaxy, with a mass of5.5×108M☉.[5] This ring appears misaligned with the central disk.[11]
NGC 2787 contains alow-ionization nuclear emission-line region (LINER) at its core, which is a type of region that is characterized by itsspectral line emission from weaklyionized atoms.[12] LINERs are very common within lenticular galaxies, with approximately one-fifth of nearby lenticular galaxies containing LINERs.[13] Thesupermassive black hole at the center has a mass of4.1+0.4 −0.5×107M☉.[14] The central region of the galaxy contains dust rings that are tilted with respect to the disk, which may be the result of anencounter with another galaxy.[11]
^abcdefgShostak, G. S. (March 1987). "The distribution of HI in the lenticular galaxy NGC 2787".Astronomy and Astrophysics.175:4–8.Bibcode:1987A&A...175....4S.
^abSkrutskie, 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 (2):1163–1183.Bibcode:2006AJ....131.1163S.doi:10.1086/498708.ISSN0004-6256.S2CID18913331.
^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.S2CID89905.
Media related toNGC 2787 at Wikimedia Commons