Astronomy:NGC 7479
| NGC 7479 | |
|---|---|
 Image taken with the Wide Field Channel of Hubble's Advanced Camera for Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 23h 04m 56.6s[1] |
| Declination | +12° 19′ 22″[1] |
| Redshift | 2381 ± 1 km/s[1] |
| Distance | 105 Mly |
| Apparent magnitude (V) | 11.6[1] |
| Characteristics | |
| Type | SB(s)c[1] |
| Apparent size (V) | 4.1′ × 3.1′[1] |
| Other designations | |
| UGC 12343,[1] PGC 70419,[1] Caldwell 44 | |
NGC 7479 (also known as Caldwell 44) 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.[2] 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.[3] 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.[2] This galaxy is similar in both size and morphology to the barred spiral NGC 1300.
Two supernovae have been observed in NGC 7479: SN 1990U (type Ic, mag. 16),[4] and SN 2009jf (type Ib, mag. 18).[5]
References
- ↑ 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.
- ↑ 2.0 2.1 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.
- ↑ 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.
- ↑ Transient Name Server entry for SN 1990U. Retrieved 29 March 2023.
- ↑ Transient Name Server entry for SN2009jf. Retrieved 29 March 2023.
External links
- NGC 7479 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS – NGC 7479
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