Astronomy:NGC 7479

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NGC 7479
NGC 7479 imaged by the Wide Field Channel of Hubble's Advanced Camera for Surveys
Observation data (J2000 epoch)
ConstellationPegasus
Right ascension 23h 04m 56.6s[1]
Declination+12° 19′ 22″[1]
Redshift2381 ± 1 km/s[1]
Distance105 Mly
Apparent magnitude (V)11.6[1]
Characteristics
TypeSB(s)c[1]
Size118,000 ly (36.2 kpc)[1]
Apparent size (V)4.1′ × 3.1′[1]
Other designations
Caldwell 44, UGC 12343, PGC 70419[1]

NGC 7479 (also known as Caldwell 44 or the Superman Galaxy[2]) is a barred spiral galaxy about 105 million light-years away in the constellation Pegasus. William Herschel discovered it in 1784. NGC 7479 is also recognized as a Seyfert galaxy and a LINER undergoing starburst activity not only on the nucleus and the outer arms, but also across the bar of the galaxy, where most of the stars were formed in the last 100 million years.[3] Polarization studies of this galaxy indicate that it recently underwent a minor merger and that it is unique in the radio continuum, with arms opening in a direction opposite to the optical arms.[4] This feature, along with the asymmetrical arms of the galaxy and the intense star formation activity are attributed to a merger with a smaller galaxy.[3] This galaxy is similar in both size and morphology to the barred spiral NGC 1300.

Supernovae

Two supernovae have been observed in NGC 7479:

  • SN 1990U (type Ic, mag. 16) was discovered by the Berkeley Automated Supernova Search on 27 July 1990.[5][6]
  • SN 2009jf (type Ib, mag. 18) was discovered by the Lick Observatory Supernova Search (LOSS) on 27 September 2009.[7][8]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NASA/IPAC Extragalactic Database". Results for NGC 7479. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+7479&img_stamp=yes&extend=no. 
  2. ↑ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579. http://www.deep-sky-atlas.com/. 
  3. ↑ 3.0 3.1 Zhou, Zhi-Min; Cao, Chen; Meng, Xian-Min; Wu, Hong (1 August 2011). "Star formation properties in barred galaxies (SFB). I. Ultraviolet to infrared imaging and spectroscopic studies of NGC 7479". The Astronomical Journal 142 (2): 38. doi:10.1088/0004-6256/142/2/38. Bibcode: 2011AJ....142...38Z. 
  4. ↑ Laine, Seppo; Beck, Rainer (20 January 2008). "Radio Continuum Jet in NGC 7479". The Astrophysical Journal 673 (1): 128–142. doi:10.1086/523960. Bibcode: 2008ApJ...673..128L. 
  5. ↑ Pennypacker, C.; Perlmutter, S.; Marvin, H. (1990). "Supernova 1990U in NGC 7479". International Astronomical Union Circular (5063): 1. Bibcode: 1990IAUC.5063....1P. 
  6. ↑ "SN 1990U". IAU. https://www.wis-tns.org/object/1990U. 
  7. ↑ Li, W.; Cenko, S. B.; Filippenko, A. V. (2009). "Supernova 2009jf in NGC 7479". Central Bureau Electronic Telegrams 1952: 1. Bibcode: 2009CBET.1952....1L. 
  8. ↑ "SN 2009jf". IAU. https://www.wis-tns.org/object/2009jf. 



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