Astronomy:NGC 634
From HandWiki
| 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] |
| Helio radial velocity | 4,925 km/s[3] |
| Distance | 217.1 Mly (66.55 Mpc)[3] |
| Apparent magnitude (V) | 14.0 |
| Characteristics | |
| Type | Sa[4] |
| Size | 144,000 ly (44.16 kpc) (diameter; D25 isophote)[4] |
| Apparent size (V) | 2′.04 × 0′.55[5] |
| Other designations | |
| MCG+06-04-048, UGC 1164,[6] PGC 6059 | |
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]
Supernovae
One supernovae have been observed in NGC 634:
- SN 2006Q (Type II, mag. 17.2) was discovered by the Lick Observatory Supernova Search (LOSS) on January 24, 2006.[5][9][10] It was 2.5″ east and 1.0″ north of the galactic core.
- SN 2008A (Type Iax, mag. 17.6) was discovered by Yoshimi Ichimura on January 2, 2008.[11][12][13][5] It was positioned 16.6 arcseconds west and 20.2 arcseconds north of the Galactic Center. This supernova reached a peak magnitude of 16.7 on January 3.[11]
References
- ↑ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S.
- ↑ Kochanek, C. S. et al. (October 2001), "The K-Band Galaxy Luminosity Function", The Astrophysical Journal 560 (2): 566–579, doi:10.1086/322488, Bibcode: 2001ApJ...560..566K
- ↑ 3.0 3.1 3.2 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. doi:10.1086/510201. Bibcode: 2007ApJ...655..790C.
- ↑ 4.0 4.1 "NED results for object NGC 0634". National Aeronautics and Space Administration / Infrared Processing and Analysis Center. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+634&extend=no&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 5.3 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. doi:10.1111/j.1365-2966.2011.18158.x. Bibcode: 2011MNRAS.412.1419L.
- ↑ "NGC 634". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+634.
- ↑ "A perfect spiral with an explosive secret". Hubble Space Telescope. May 30, 2011. https://www.spacetelescope.org/images/potw1122a/.
- ↑ Seligman, Courtney. "NGC 634". https://cseligman.com/text/atlas/ngc6.htm#634.
- ↑ Li, W. et al. (January 2006). Green, D. W. E.. ed. "Supernovae 2006Q, 2006R, 2006S". IAU Circular (8664): 2. Bibcode: 2006IAUC.8664....2L. http://www.cbat.eps.harvard.edu/iauc/08600/08664.html#Item2.
- ↑ "SN 2006Q". IAU. https://www.wis-tns.org/object/2006Q.
- ↑ 11.0 11.1 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. http://www.cbat.eps.harvard.edu/cbet/001100/CBET001193.txt.
- ↑ Foley, Ryan J.; Challis, P. J.; Chornock, R.; Ganeshalingam, M.; Li, W.; Marion, G. H.; Morrell, N. I.; Pignata, G. et al. (2013). "Type Iax Supernovae: A New Class of Stellar Explosion". The Astrophysical Journal 767 (1): 57. doi:10.1088/0004-637X/767/1/57. Bibcode: 2013ApJ...767...57F.
- ↑ "SN 2008A". IAU. https://www.wis-tns.org/object/2008A.
External links
- A Perfect Spiral with an Explosive Secret: ESA/Hubble Picture of the week.
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