The properties of NGC 2841 are similar to those of theAndromeda Galaxy.[4] It is home to a large population ofyoung blue stars, and a fewH II regions.[9] The luminosity of the galaxy is2×1010L☉ and it has a combined mass of7×1010M☉.[6] Its disk of stars can be traced out to a radius of around 228 kly (70 kpc). This disk begins to warp at a radius of around 98 kly (30 kpc), suggesting the perturbing effect of in-falling matter from the surrounding medium.[5]
The rotational behavior of the galaxy suggests there is a massivenuclear bulge,[6] with alow-ionization nuclear emission-line region (LINER) at the core; a type of region that is characterized byspectral line emission from weaklyionized atoms.[10] A prominentmolecular ring is orbiting at a radius of 7–20 kly (2–6 kpc), which is providing a star-forming region of gas and dust.[6] The nucleus appears decoupled and there is a counter-rotating element of stars and gas in the outer parts of the nucleus, suggesting a recent interaction with a smaller galaxy.[6]
SN 1957A (Type Ia-pec, mag. 14) was discovered byMax Schürer on 1 March 1957.[13][14] [Note: some sources incorrectly list the discovery date as 26 February 1957.]
SN 1972R (type unknown, mag. 16) was discovered byPaul Wild on 5 December 1972.[15]
SN 1999by (Type Ia-pec, mag. 15) was codiscovered by Ron Arbour, and theLick Observatory Supernova Search, on 30 April 1999.[16][17]
^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.
^Pease, F. G. (1917). "A Suspected Nova in the Nebula N. G. C. 2841".Publications of the Astronomical Society of the Pacific.29 (171): 213.Bibcode:1917PASP...29..213P.doi:10.1086/122639.
^"SN1912A".Transient Name Server.IAU. Retrieved2 December 2024.
^Hansen, Julie M. Vinter (6 March 1957)."Circular No. 1588".Central Bureau for Astronomical Telegrams. Observatory Copenhagen. Retrieved3 December 2024.
^"SN1957A".Transient Name Server.IAU. Retrieved2 December 2024.
^"SN1972R".Transient Name Server.IAU. Retrieved2 December 2024.
^Arbour, R.; Papenkova, M.; Li, W. D.; Filippenko, A. V.; Armstrong, M. (1999). "Supernova 1999by in NGC 2841".International Astronomical Union Circular (7156): 1.Bibcode:1999IAUC.7156....1A.
^"SN1999by".Transient Name Server.IAU. Retrieved2 December 2024.
