NGC 634 is a spiral galaxy, lying at a distance of 217.1 megalight-years[3] away from the Milky Way in the northern constellation of Triangulum. This object was discovered on 26 October 1876 by French astronomer Édouard Stephan.[7][8] It is inclined by an angle of 82.4° to the line of sight from the Earth, and thus is being viewed nearly edge on.[5]
| NGC 634 | |
|---|---|
 Picture created from images taken with the Wide Field Channel of Hubble's Advanced Camera for Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Triangulum |
| Right ascension | 01h 38m 18.679s[1] |
| Declination | +35° 21′ 53.47″[1] |
| Redshift | 0.016417[2] |
| Heliocentric radial velocity | 4,925 km/s[3] |
| Distance | 217.1 Mly (66.55 Mpc)[3] |
| Apparent magnitude (V) | 14.0 |
| Characteristics | |
| Type | Sa[4] |
| Apparent size (V) | 2′.04 × 0′.55[5] |
| Other designations | |
| MCG+06-04-048, UGC 1164,[6] PGC 6059 | |
Supernova SN 2006Q was reported 2.5″ east and 1.0″ north of the galactic core in NGC 634, January 24, 2006. This was most likely a type II supernova[5] and reached magnitude 18.74.[9] Another supernova explosion was reported near the galaxy on January 2, 2008. It was positioned 16.6 arcseconds west and 20.2 arcseconds north of the Galactic Center and was designated SN 2008A. This event reached a peak magnitude of 16.7 on January 3,[10] and was determined to be a type Iax supernova.[5]
References
edit- ^ a b Skrutskie, 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. ISSN 0004-6256. S2CID 18913331.
- ^ Kochanek, C. S.; et al. (October 2001), "The K-Band Galaxy Luminosity Function", The Astrophysical Journal, 560 (2): 566–579, arXiv:astro-ph/0011456, Bibcode:2001ApJ...560..566K, doi:10.1086/322488, S2CID 119420446
- ^ a b c Crook, Aidan C.; Huchra, John P.; Martimbeau, Nathalie; Masters, Karen L.; Jarrett, Tom; Macri, Lucas M. (February 2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. 655 (2): 790–813. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. doi:10.1086/510201. S2CID 11672751.
- ^ "NED results for object NGC 0634". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 3 February 2017.
- ^ a b c d Leaman, Jesse; et al. (April 2011). "Nearby supernova rates from the Lick Observatory Supernova Search – I. The methods and data base". Monthly Notices of the Royal Astronomical Society. 412 (3): 1419–1440. arXiv:1006.4611. Bibcode:2011MNRAS.412.1419L. doi:10.1111/j.1365-2966.2011.18158.x. S2CID 118430231.
- ^ "NGC 634". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-04-02.
- ^ "A perfect spiral with an explosive secret". Hubble Space Telescope. May 30, 2011. Retrieved 2020-04-03.
- ^ Seligman, Courtney. "NGC 634". Celestial Atlas. Retrieved 26 August 2024.
- ^ Li, W.; et al. (January 2006). Green, D. W. E. (ed.). "Supernovae 2006Q, 2006R, 2006S". IAU Circular. 8664: 2. Bibcode:2006IAUC.8664....2L.
- ^ Nakano, S.; et al. (January 2008). Green, D. W. E. (ed.). "Supernova 2008A in NGC 634". Central Bureau Electronic Telegrams. 1193: 1. Bibcode:2008CBET.1193....1N.
External links
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Media related to NGC 634 at Wikimedia Commons- A Perfect Spiral with an Explosive Secret: ESA/Hubble Picture of the week.
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