The
morphological classification of NGC 4030 in the
De Vaucouleurs system is SA(s)bc,[3] which indicates a spiral structure (SA) with no bar (s) and moderate to loosely wound arms (bc).[7] The inner part of the galaxy shows a complex structure with multiple spiral arms, which becomes a symmetric, double arm pattern beyond 49″ from the core.[5] The central
bulge is relatively young with an estimated age of two billion years,[8] while the nucleus is
inactive.[9]
In 2007, a
supernova explosion was discovered in the galaxy from images taken on February 19 from the 1 m Swope telescope at
Las Campanas Observatory in Chile. Designated SN 2007aa, it was a
type IIP[10] supernova positioned 68″.5 north and 60″.8 east of the galactic nucleus.[11] The progenitor was a
red giant star with 8.5–16.5 times the
mass of the Sun.[10]
^
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.
^Ocvirk, P.; et al. (December 2008), "Extragalactic archeology in integrated light: A test case with NGC 4030", Astronomische Nachrichten, 329 (9–10): 980–983,
Bibcode:
2008AN....329..980O,
doi:
10.1002/asna.200811075.