NGC 7793

NGC 7793
NGC 7793 as observed with the Spitzer Space Telescope as part of the Spitzer Infrared Nearby Galaxy Survey. The blue colors represent the 3.6 micrometre emission from stars. The green and red colors represent the 5.8 and 8.0 micrometre emission from polycyclic aromatic hydrocarbons and possibly dust.
Observation data (J2000 epoch)
Constellation	Sculptor
Right ascension	23h 57m 49.8s[1]
Declination	-32° 35′ 28″[1]
Redshift	227 ± 2 km/s[1]
Distance	12.7 ± 1.3 Mly (3.9 ± 0.4 Mpc)[2][3][4]
Type	SA(s)d[1]
Apparent dimensions (V)	9′.3 × 6′.3[1]
Apparent magnitude (V)	10.0[1]
Other designations
PGC 73049[1]
See also: Galaxy, List of galaxies

Image of the chaotic spiral galaxy NGC 7793

NGC 7793 is a spiral galaxy about 12.7 million light-years away in the constellation Sculptor. It was discovered in 1826 by James Dunlop.^[5]

Galaxy group information

NGC 7793 is one of the brightest galaxies within the Sculptor Group, a group of galaxies in the constellation of the same name. The group itself is an elongated, loosely bound group of galaxies with the Sculptor Galaxy (NGC 253) and its companion galaxies forming a tightly-bound core of galaxies near the center.^[2]

Supernova 2008bk

On March 25, 2008, SN 2008bk was discovered in NGC 7793.^[6] At apparent magnitude 12.5, it became the 2nd brightest supernova of 2008.^[7]

Black hole in outer spiral

A black hole about the size of our sun in the outer spiral of this galaxy has some spectacular jets.^[8]

See also

• NGC 300 - a similar spiral galaxy that is near NGC 7793
• NGC 2403 - a similar spiral galaxy

References

1. ^ ^{a b c d e f g} "NASA/IPAC Extragalactic Database". Results for NGC 7793. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+7793&img_stamp=yes&extend=no. Retrieved 2006-11-21. 
2. ^ ^{a b} I. D. Karachentsev, E. K. Grebel, M. E. Sharina, A. E. Dolphin, D. Geisler, P. Guhathakrta, P. W. Hodge, V. E. Karachentseva, A. Sarajedini, P. Seitzer (2003). "Distances to nearby galaxies in Sculptor". Astronomy and Astrophysics 404 (1): 93–111. arXiv:astro-ph/0302045. Bibcode 2003A&A...404...93K. doi:10.1051/0004-6361:20030170. 
3. ^ I. D. Karachentsev, V. E. Karachentseva, W. K. Hutchmeier, D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal 127 (4): 2031–2068. Bibcode 2004AJ....127.2031K. doi:10.1086/382905. 
4. ^ Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics 49 (1): 3–18. Bibcode 2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6. 
5. ^ Dunlop James (1828). "A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere observed in New South Wales". Philosophical Transactions of the Royal Society 118: 113–151. Bibcode 1828RSPT..118..113D. doi:10.1098/rstl.1828.0010. JSTOR 107841. 
6. ^ David Bishop. "Supernova 2008bk in NGC 7793". supernovae.net (International Supernovae Network). http://www.supernovae.net/sn2008/#2008bk. Retrieved 2010-06-07. 
7. ^ David Bishop. "Bright Supernovae - 2008". supernovae.net (International Supernovae Network). http://www.supernovae.net/sn2008/. Retrieved 2010-06-07. 
8. ^ Black hole emitting a giant gas bubble 1000 light-years wide

External links

• SST: NGC 7793