Astronomy:NGC 4274

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NGC 4274
NGC 4274 imaged by Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension 12h 19m 50.5963s[1]
Declination+29° 36′ 52.912″[1]
Redshift0.003102±0.0000230[1]
Helio radial velocity930±7 km/s[1]
Distance45.37 ± 4.66 Mly (13.911 ± 1.429 Mpc)[1]
Group or clusterNGC 4274 group (LGG 279)
Apparent magnitude (V)10.4[2]
Characteristics
Type(R)SB(r)ab [1]
Size~99,000 ly (30.35 kpc) (estimated)[1]
Apparent size (V)6.8′ × 2.5′[1]
Other designations
IRAS 12173+2953, UGC 7377, MCG+05-29-060, PGC 39724[1]

NGC 4274 is a barred spiral galaxy located in the constellation Coma Berenices. It is located at a distance of about 45 million light years from Earth, which, given its apparent dimensions, means that NGC 4274 is about 95,000 light years across. It was discovered by German-British astronomer William Herschel on 13 March 1785.[3]

Characteristics

NGC 4274 is a LINER galaxy, i.e. a galaxy whose nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[4][2]

NGC 4274 is characterised by its overlapping outer arms, forming a ring structure with apparent diameter 2.8′. The inner arms begin near the edge of the bulge and they are bright and dusty, with dust lanes that are more prominent at the near side. Outside the near-ring a set of fainter outer arms has been detected.[5] These outer arms also form a ring, with diameter 5.9′. A third rings exists near the nucleus.[6] The nuclear ring has semimajor axis 9", which corresponds to 680 parsec at that distance.[7]

The bar of the galaxy is 5 kpc long.[7] The galaxy features a nuclear bar that is almost perpendicular to the outer bar.[8][9]

Nearby galaxies

The NGC 4274 Group

NGC 4274 is the foremost member of a galaxy group known as NGC 4274 group. Other members of the group are NGC 4173, NGC 4245, NGC 4251, NGC 4283, IC 3215, NGC 4310, and NGC 4314.[10] It is part of the Coma I Group which is part of the Virgo Supercluster.[11]

Supernova

One supernova has been observed in NGC 4274:

  • SN 1999ev (Type II, mag. 14.4) was discovered by Scottish amateur astronomer Tom Boles on 7 November 1999.[12][13]
  • NGC 4274 (HST)
    NGC 4274 (HST)
  • NGC 4274 (SDSS DR14)
    NGC 4274 (SDSS DR14)

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "NASA/IPAC Extragalactic Database". Results for NGC 4274. http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4274. 
  2. ↑ 2.0 2.1 "NGC 4274". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+4274. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 4274". https://cseligman.com/text/atlas/ngc37.htm#3735. 
  4. ↑ Véron-Cetty, M.-P.; Véron, P. (2006). "A catalogue of quasars and active nuclei: 12th edition". Astronomy and Astrophysics 455 (2): 773. doi:10.1051/0004-6361:20065177. Bibcode: 2006A&A...455..773V. 
  5. ↑ Sandage, A.; Bedke, J. (1994). The Carnegie Atlas of Galaxies. Volume I. Carnegie Institution of Washington. 
  6. ↑ Comerón, S.; Salo, H.; Laurikainen, E.; Knapen, J. H.; Buta, R. J.; Herrera-Endoqui, M.; Laine, J.; Holwerda, B. W. et al. (19 February 2014). "ARRAKIS: atlas of resonance rings as known in the S4G". Astronomy & Astrophysics 562: A121. doi:10.1051/0004-6361/201321633. Bibcode: 2014A&A...562A.121C. https://www.aanda.org/articles/aa/full_html/2014/02/aa21633-13/aa21633-13.html. Retrieved 19 July 2017. 
  7. ↑ 7.0 7.1 Comerón, S.; Knapen, J. H.; Beckman, J. E.; Laurikainen, E.; Salo, H.; Martínez-Valpuesta, I.; Buta, R. J. (March 2010). "AINUR: Atlas of Images of NUclear Rings". Monthly Notices of the Royal Astronomical Society 402 (4): 2462–2490. doi:10.1111/j.1365-2966.2009.16057.x. Bibcode: 2010MNRAS.402.2462C. 
  8. ↑ Shaw, M.; Axon, D.; Probst, R.; Gatley, I. (15 May 1995). "Nuclear bars and blue nuclei within barred spiral galaxies". Monthly Notices of the Royal Astronomical Society 274 (2): 369–387. doi:10.1093/mnras/274.2.369. Bibcode: 1995MNRAS.274..369S. 
  9. ↑ Erwin, Peter (13 February 2004). "Double-barred galaxies". Astronomy & Astrophysics 415 (3): 941–957. doi:10.1051/0004-6361:20034408. Bibcode: 2004A&A...415..941E. 
  10. ↑ Makarov, Dmitry; Karachentsev, Igor (21 April 2011). "Galaxy groups and clouds in the local (z~ 0.01) Universe". Monthly Notices of the Royal Astronomical Society 412 (4): 2498–2520. doi:10.1111/j.1365-2966.2010.18071.x. Bibcode: 2011MNRAS.412.2498M. 
  11. ↑ Gregory, Stephen A.; Thompson, Laird A. (April 1977). "The Coma i Galaxy Cloud" (in en). The Astrophysical Journal 213: 345–350. doi:10.1086/155160. ISSN 0004-637X. Bibcode: 1977ApJ...213..345G. 
  12. ↑ Hurst, G. M.; Boles, T.; Armstrong, M.; Schwartz, M.; Garnavich, P.; Jha, S.; Kirshner, R.; Berlind, P. et al. (1999). "Supernova 1999ev in NGC 4274". International Astronomical Union Circular (7306): 1. Bibcode: 1999IAUC.7306....1H. http://www.cbat.eps.harvard.edu/iauc/07300/07306.html#Item1. 
  13. ↑ "SN 1999ev". IAU. https://www.wis-tns.org/object/1999ev. 

Coordinates: Sky map 12h 19m 50.5963s, +29° 36′ 52.912″



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