NGC 3972
| NGC 3972 | |
|---|---|
 NGC 3972 imaged by tne Hubble Space Telescope.[1] | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 55m 45.1s[2] |
| Declination | +55° 19′ 14″[2] |
| Redshift | 0.002799[3] |
| Heliocentric radial velocity | 846 km/s[2] |
| Distance | 66.0 Mly (20.23 Mpc)[2] |
| Group or cluster | NGC 3992 Group[4] |
| Apparent magnitude (V) | 13.14[3] |
| Characteristics | |
| Type | SA(s)bc,[5] SBbc[6] |
| Size | c. 50,000 ly |
| Other designations | |
| IRAS 11531+5535, 2MASX J11554511+5519144, UGC 6904, LEDA 37466, MCG +09-20-032[3] | |
NGC 3972 is a spiral galaxy located in the northern constellation of Ursa Major. It was discovered by William Herschel on April 14, 1789.[7] This galaxy is located 66 million light years away and is receding with a heliocentric radial velocity of 846 km/s.[2] It is a member of the NGC 3992 Group of galaxies.[4]
NGC 3972 along with NGC 3977 are listed together as Holm 304 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937.[8] This grouping is purely optical, as NGC 3977 is about four times farther away than NGC 3972.[9]
NGC 3972 is a radio galaxy, i.e. a galaxy with giant regions of radio emission extending well beyond its visible structure.[10]
Supernovae
[edit]Two supernovae have been observed in NGC 3972:
- SN 2011by (type Ia, mag. 14.2) was discovered by Zhangwei Jin and Xing Gao in China, on 27 April 2011.[11][12] It was ten days short of maximum, and positioned at an offset 5.3″ east and 19.1″ north of the galactic nucleus.[13]
- SN 2021acna (type II, mag. 19.39) was discovered by the Zwicky Transient Facility on 30 October 2021.[14]
Gallery
[edit]-
NGC 3972 by the Sloan Digital Sky Survey
See also
[edit]References
[edit]- ^ "Galaxy full of cosmic lighthouses". www.spacetelescope.org. Retrieved 5 March 2018.
- ^ a b c d e Tully, R. Brent; et al. (2016). "Cosmicflows-3". The Astronomical Journal. 152 (2): 21. arXiv:1605.01765. Bibcode:2016AJ....152...50T. doi:10.3847/0004-6256/152/2/50. S2CID 250737862. 50.
- ^ a b c "NGC 3972". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-12-20.
- ^ a b Karachentsev, I. D.; et al. (March 2013). "Anatomy of Ursa Majoris". Monthly Notices of the Royal Astronomical Society. 429 (3): 2264–2273. arXiv:1211.5975. Bibcode:2013MNRAS.429.2264K. doi:10.1093/mnras/sts494.
- ^ "Results for object NGC 3972 (NGC 3972)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-02-18.
- ^ Paturel, G.; et al. (December 2003). "HYPERLEDA. I. Identification and designation of galaxies". Astronomy and Astrophysics. 412: 45–55. Bibcode:2003A&A...412...45P. doi:10.1051/0004-6361:20031411.
- ^ Seligman, Courtney. "New General Catalog Objects: NGC 3950 - 3999". cseligman.com. Retrieved 2021-03-12.
- ^ Holmberg, Erik (1937). "A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems". Annals of the Observatory of Lund. 6: 1. Bibcode:1937AnLun...6....1H.
- ^ "Distance Results for NGC 3972". NASA/IPAC EXTRAGALACTIC DATABASE. NASA. Retrieved 20 December 2024.
- ^ "NGC 3972". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 December 2024.
- ^ Green, D. W. E. (2011). "Supernova 2011by in NGC 3972 = PSN J11554556+5519338". Central Bureau Electronic Telegrams. 2708: 1. Bibcode:2011CBET.2708....1G.
- ^ "SN 2011by". Transient Name Server. IAU. Retrieved 4 September 2024.
- ^ Boyd, David (September 2011). "SN 2011BY - A Type 1A Supernova in NGC 3972 Discovered before maximum". British Astronomical Association Variable Star Section Circular. 149 (149): 10–12. Bibcode:2011BAAVC.149...10B.
- ^ "SN 2021acna". Transient Name Server. IAU. Retrieved 4 September 2024.
External links
[edit]
Media related to NGC 3972 at Wikimedia Commons- NGC 3972 on SIMBAD
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