Astronomy:NGC 232
| NGC 232 | |
|---|---|
| File:NGC 230 NGC 232 NGC 235 IC 1573 DECam.jpg | |
| Observation data (J2000 epoch) | |
| Constellation | Cetus |
| Right ascension | 00h 42m 45.814s[1] |
| Declination | −23° 33′ 40.69″[1] |
| Redshift | 0.022890[2] |
| Distance | 275.0 Mly (84.33 Mpc)[3] |
| Apparent magnitude (V) | 14.46[4] |
| Characteristics | |
| Type | SB(r)[4] or Sa[5] |
| Apparent size (V) | 1.0' × 0.8'[4] |
| Other designations | |
| ESO 474- G 015, 6dF J0042457-233341, PMN J0042-2333, IRAS 00402-2350, NGC 232, MCG-04-02-040[6] | |
NGC 232 is a spiral galaxy located in the equatorial constellation of Cetus, the whale.[7] It was discovered in 1886 by the American astronomer Francis Leavenworth.[8] NGC 232 has an apparent visual magnitude of 14.5 and an angular size of 1.0′ × 0.8′.[4] It is located at an estimated distance of 275 million light-years (84.33 Mpc),[3] and is part of a group that includes NGC 235.[5]
This is a Type II Seyfert galaxy; a class of galaxy with an active galactic nucleus. There is a circumnuclear star forming ring with a radius of about 1,400 ly (440 pc).[9] NGC 232 is classified as a luminous infrared galaxy and is radio quiet. In 2017, a linear emission line feature was reported in this galaxy. This jet-like structure extended from the nucleus for a distance of approximately 9.8 kly (3 kpc), with a width of 2.6 kly (0.8 kpc). It is not perpendicular to the galaxy disk. As of the date of discovery, it is the second longest such feature detected in a galaxy, exceeded only by 3C 120.[5]
On September 3, 2006, K. Itagaki of Yamagata, Japan, reported the discovery of a magnitude 16.1 supernova in NGC 232. Designated SN 2006et, it was located at a position of 0.3″ east and 11.0″ north of the galaxy's center.[10] The spectrum was similar to Type Ia supernova event, with a slow decline pattern such as SN 1997br or SN 1995ac.[11]
References
- ↑ 1.0 1.1 Skrutskie, M. F. (2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. Bibcode: 2006AJ....131.1163S.
- ↑ Samsonyan, Anahit (2016). "Neon and [C II] 158 μm Emission Line Profiles in Dusty Starbursts and Active Galactic Nuclei". The Astrophysical Journal Supplement Series 226 (1): 11. doi:10.3847/0067-0049/226/1/11. Bibcode: 2016ApJS..226...11S.
- ↑ 3.0 3.1 Tully, R. Brent (August 2016). "Cosmicflows-3". The Astronomical Journal 152 (2): 21. doi:10.3847/0004-6256/152/2/50. 50. Bibcode: 2016AJ....152...50T.
- ↑ 4.0 4.1 4.2 4.3 "NASA/IPAC Extragalactic Database". Results for NGC 0232. http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+232&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ 5.0 5.1 5.2 López-Cobá, C. (November 2017). "Serendipitous Discovery of an Optical Emission-line Jet in NGC 232". The Astrophysical Journal Letters 850 (1): id. L17. doi:10.3847/2041-8213/aa98db. Bibcode: 2017ApJ...850L..17L.
- ↑ "NGC 232". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+232.
- ↑ Frommert, Hartmut. "NGC 232". Students for the Exploration and Development of Space. https://spider.seds.org/ngc/ngc.cgi?NGC+232.
- ↑ Seligman, C.. "New General Catalog Objects: NGC 200 - 249". Celestial Atlas. http://cseligman.com/text/atlas/ngc2.htm#232.
- ↑ Costa-Souza, José Henrique (January 2024). "AGN feedback and star formation in the peculiar galaxy NGC 232: insights from VLT-MUSE observations". Monthly Notices of the Royal Astronomical Society 527 (3): 9192–9205. doi:10.1093/mnras/stad3809. Bibcode: 2024MNRAS.527.9192C.
- ↑ Nakano, S.; Itagaki, K. (September 2006). Green, D. W. E.. ed. "Supernova 2006et in NGC 232". Central Bureau Electronic Telegrams 616: 1. Bibcode: 2006CBET..616....1N.
- ↑ Elias-Rosa, N. (September 2006). Green, D. W. E.. ed. "Supernova 2006et in NGC 232". Central Bureau Electronic Telegrams 619: 1. Bibcode: 2006CBET..619....1E.
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