NGC 4013是一个位于大熊座的棒旋星系,距离地球5500万光年[4],属于大熊座星系团[5]。1989年12月30日人们在星系内发现超新星SN 1989Z[6]。
参考
- ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 NASA/IPAC Extragalactic Database. Results for NGC 4013. [2006-11-25]. (原始内容存档于2002-08-12).
- ^ Distance Results for NGC 4013. NASA/IPAC Extragalactic Database. [2010-06-13].
- ^ 3.0 3.1 3.2 3.3 3.4 3.5 SIMBAD. Results for NGC 4013. [2009-12-25]. (原始内容存档于2020-01-04).
- ^ 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.
- ^ Rueff, Katherine M.; Howk, J. Christopher; Pitterle, Marissa; Hirschauer, Alec S.; Fox, Andrew J.; Savage, Blair D. The Relationship Between the Dense Neutral and Diffuse Ionized Gas in the Thick Disks of Two Edge-On Spiral Galaxies. The Astronomical Journal. 2013-01-31, 145 (3): 62. Bibcode:2013AJ....145...62R. ISSN 0004-6256. S2CID 119277886. arXiv:1301.0325 . doi:10.1088/0004-6256/145/3/62.
- ^ List of Supernovae. Harvard-Smithsonian Center for Astrophysics (IAU). [2010-07-14]. (原始内容存档于2020-05-12).
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