NGC 4013 is an edge-onbarred spiral galaxy about55 millionlight-years away in theconstellationUrsa 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]
Infrared image of the galaxy showing a ring of heavy star formation
A recentdeep color image of NGC 4013 revealed a loopingtidal stream of stars extending over 80 thousand light-years from theGalactic Center. This structure is thought to be the remnants of a smaller galaxy that was torn apart bytidal forces as it collided with NGC 4013.[5]
Supernova SN 1989Z was discovered on December 30, 1989 at apparent magnitude 12.[6]
^abcdef"SIMBAD".Results for NGC 4013. Retrieved2009-12-25.
^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.