Star formation in the galaxy is chaotic and not confined to the spiral arms, but the rate is not high enough to classify it as a starburst galaxy. Star formation has taken place in small bursts in the last 40 million years. The cause of this activity has been proposed as a merger with a gas-rich dwarf galaxy. A radio source has been detected 3.5' south-west of the galaxy, connected to it by a bridge.[8]
NGC 1084 has been the site of 5 supernovae explosions since 1963: SN 1963P (type Ia, mag. 14),[9]SN 1996an (type II, mag. 14),[10]SN 1998dl (Type II, mag. 16),[11]SN 2009H (Type II, mag. 17.4),[12] and SN 2012ec (Type IIP, mag. 14.5).[13][14][15]
^ 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.
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