Astronomy:NGC 2748

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Short description: Galaxy in the constellation Camelopardalis
NGC 2748
NGC2748-hst-R814GB450.jpg
NGC 2748 imaged by the Hubble Space Telescope
Observation data (J2000.0 epoch)
ConstellationCamelopardalis
Right ascension 09h 13m 43.037s[1]
Declination+76° 28′ 31.23″[1]
Redshift0.004930[2]
Helio radial velocity1,473 km/s[3]
Distance61.3 Mly (18.79 Mpc)[3]
Apparent magnitude (V)11.7[4]
Characteristics
TypeSAbc[5]
Apparent size (V)2.250 × 0.720 arcmin[2]
Other designations
UGC 4825, MCG+13-07-019, PGC 26018[2]

NGC 2748 is a spiral galaxy in the northern circumpolar constellation of Camelopardalis,[6] located at a distance of 61.3 megalight-years from the Milky Way.[3] It was discovered September 2, 1828 by John Herschel.[6] The morphological classification of SAbc[5] indicates this is an unbarred spiral with moderate to loosely-wound spiral arms. It is a disk-like peculiar galaxy with a stellar shell that is rotating about the main galactic axis. This shell was most likely formed through the capture and disruption of a dwarf companion.[7] The galactic nucleus likely contains a supermassive black hole with a mass of 4.4+3.5
−3.6×107 M☉, or 44 million times the mass of the Sun.[5]

A magnitude 14.5 supernova, designated SN 1985A, was discovered in this galaxy on January 25, 1985. It was located 3″ west and 10″ south of the galaxy's nucleus,[8] and was later classified as a type Ia supernova.[9] On August 31, 2013, a supernova event was reported at a position 19″ west and 21″ north of the core of NGC 2748. It was designated SN 2013ff and reached magnitude 15.2. Subsequent studies found a best match to a type Ic supernova.[10] The discovery of a supernova impostor in this galaxy was announced February 10, 2015.[11] During September 2017, the discovery of supernova SN2017gkk in host galaxy NGC 2748 was announced.[12]

References

  1. ↑ 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. 
  2. ↑ 2.0 2.1 2.2 "NGC 2748". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2748. 
  3. ↑ 3.0 3.1 3.2 Tully, R. Brent et al. (August 2016). "Cosmicflows-3". The Astronomical Journal 152 (2): 21. doi:10.3847/0004-6256/152/2/50. 50. Bibcode: 2016AJ....152...50T. 
  4. ↑ Frommert, Hartmut. "NGC 2748". http://spider.seds.org/ngc/ngc_fr.cgi?NGC_2748. 
  5. ↑ 5.0 5.1 5.2 Atkinson, J. W. et al. (May 2005). "Supermassive black hole mass measurements for NGC 1300 and 2748 based on Hubble Space Telescope emission-line gas kinematics". Monthly Notices of the Royal Astronomical Society 359 (2): 504–520. doi:10.1111/j.1365-2966.2005.08904.x. Bibcode: 2005MNRAS.359..504A. 
  6. ↑ 6.0 6.1 Seligman, Courtney. "Celestial Atlas: NGC Objects: NGC 2700 - 2749". https://cseligman.com/text/atlas/ngc27.htm#2748. 
  7. ↑ Merkulova, O. A. et al. (September 2009). "2-D spectroscopy of polar-ring galaxies candidates. II. The peculiar galaxies NGC 2748 and UGC 4385". Astronomy Letters 35 (9): 587–598. doi:10.1134/S1063773709090023. Bibcode: 2009AstL...35..587M. 
  8. ↑ Wild, P.; Schildknecht, T. (January 1985). Marsden, B. G.. ed. "Supernova 1985A in NGC 2748". IAU Circular 4031: 3. Bibcode: 1985IAUC.4031....3W. 
  9. ↑ Wegner, Gary; McMahan, Robert K. (February 1987). "Spectroscopy of the Supernova 1982V, 1984A, and 1985B". Astronomical Journal 93: 287. doi:10.1086/114312. Bibcode: 1987AJ.....93..287W. 
  10. ↑ Brimacombe, J. et al. (September 2013). Green, D. W. E.. ed. "Supernova 2013ff in NGC 2748 = Psn J09133888+7628108". Central Bureau Electronic Telegrams 3647: 1. Bibcode: 2013CBET.3647....1B. 
  11. ↑ Tartaglia, L. et al. (June 2016). "The Supernova Impostor PSN J09132750+7627410 and Its Progenitor". The Astrophysical Journal Letters 823 (2): 7. doi:10.3847/2041-8205/823/2/L23. L23. Bibcode: 2016ApJ...823L..23T. 
  12. ↑ Onori, F. et al. (September 2017). "Spectroscopic observation of SN2017gkk by NUTS (NOT Un-biased Transient Survey)". The Astronomer's Telegram 10698: 1. Bibcode: 2017ATel10698....1O. 

External links

Coordinates: Sky map 09h 13m 43.0s, +76° 28′ 31″



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