NGC 4536 is located about 10° south of the midpoint of theVirgo cluster. However, it is not considered a member of the cluster.[6] Rather, it is a member of theM61 Group of galaxies, which is a member of theVirgo II Groups, a series of galaxies andgalaxy clusters strung out from the southern edge of theVirgo Supercluster.[8][9][10] Themorphological classification in the De Vaucouleurs system is SAB(rs)bc, which indicates it is a weakly barred spiral galaxy with a hint of an inner ring structure plus moderate to loosely wound arms.[6] It does not have aclassical bulge around the nucleus.[11]
NGC 4536 has the optical characteristics of anHII galaxy, which means it is undergoing a strong burst of star formation.[11] This is occurring prominently in the ring that surrounds the bar and nucleus.[12] Based upon the level ofX-ray emission from the core, it may have a smallsupermassive black hole with 104–106 times themass of the Sun.[11]
Onesupernova has been observed in NGC 4536: SN1981B (typeIa, mag. 12.3) was discovered by Dmitry Tsvetkov on 2 March 1981, located 51arcseconds to the northeast of theGalactic Center.[13][14] It reached a peakvisual magnitude of 12 on March 8 before steadily fading from view over the next two months.[6]
^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.
^abcdButa, R. J.; Turner, A. (January 1983), "The photometric properties of the bright Type I supernova 1981b in NGC 4536",Publications of the Astronomical Society of the Pacific,95:72–78,Bibcode:1983PASP...95...72B,doi:10.1086/131120.
![Detail of a region of extremely rapid star formation in this "starburst galaxy".[15]](/mt/?noimg=&dark=on&url=https%3a%2f%2fen.wikipedia.org%2fwiki%2fFile%3aStarbursts_in_Virgo.jpg)
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