NGC 4013

NGC 4013
HST closeup view of NGC 4013
Observation data (J2000 epoch)
Constellation	Ursa Major
Right ascension	11h 58m 31.13s[1]
Declination	+43° 56′ 50.1″[1]
Redshift	831 ± 1 km/s[1]
Distance	60.6 ± 8.1 Mly (18.6 ± 2.5 Mpc)[2]
Type	SBa[1]
Apparent dimensions (V)	5.2' x 1.0'[1]
Apparent magnitude (V)	12.1B[1]
Other designations
UGC 6963,[1] PGC 37691[1] LEDA 37691[3] 2MFGC 9412[3] IRAS 11559+4413[3] 2MASX J11583141+4356492[3] MCG+07-25-009[3] UZC J115831.5+435651[3]
See also: Galaxy, List of galaxies

NGC 4013 is an edge-on barred spiral galaxy about 55 million light-years away in the constellation Ursa Major. The disk of NGC 4013 shows a distinct "peanut"-shaped bulge in long exposure photographs that N-body computer simulations suggest is consistent with a stellar bar seen perpendicular to the line of sight.^[4]

Ring of New Stars in NGC 4013.

A recent deep color image of NGC 4013 revealed a looping tidal stream of stars extending over 80 thousand light-years from the galactic core. This structure is thought to be the remnants of a smaller galaxy that was torn apart by tidal forces as it collided with NGC 4013.^[5]

Supernova SN 1989Z was discovered on December 30, 1989 at apparent magnitude 12.^[6]

See also

• Cigar Galaxy

References

1. ^ ^{a b c d e f g h} "NASA/IPAC Extragalactic Database". Results for NGC 4013. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4013&img_stamp=yes&extend=no. Retrieved 2006-11-25. 
2. ^ "Distance Results for NGC 4013". NASA/IPAC Extragalactic Database. http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4013. Retrieved 2010-06-13. 
3. ^ ^{a b c d e f} "SIMBAD". Results for NGC 4013. http://simbad.harvard.edu/simbad/sim-basic?Ident=NGC+4013&submit=SIMBAD+search. Retrieved 2009-12-25. 
4. ^ Combes, F. and Sanders, R.H., "Formation and properties of persisting stellar bars", Astronomy and Astrophysics, vol. 96, no. 1-2, Mar. 1981, p. 164-173.
5. ^ D. Martínez-Delgado (IAC), M. Pohlen (Cardiff), R. Jay GaBany (Blackbird Obs), S. Majewski (Univ Virginia), J. Peñarrubia (Univ Victoria) and C. Palma (Penn State) (2009). "DISCOVERY OF A GIANT STELLAR TIDAL STREAM AROUND THE DISK GALAXY NGC 4013". Astronomical Journal 692 (2): 955–963. Bibcode 2009ApJ...692..955M. doi:10.1088/0004-637X/692/2/955. http://www.iop.org/EJ/abstract/0004-637X/692/2/955. 
6. ^ "List of Supernovae". Harvard-Smithsonian Center for Astrophysics (IAU). http://cbat.eps.harvard.edu/lists/Supernovae.html#1989Z. Retrieved 2010-07-14. 

External links

• The Discovery of a Giant Stellar Tidal Stream Around NGC4013
• HubbleSite NewsCenter: A Galaxy on the Edge
• Astronomy Picture of the Day: NGC 4013 and the Tidal Stream