NGC 2207 and IC 2163

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A Hubble Space Telescope (HST) image of NGC 2207 and IC 2163.

NGC 2207 and IC 2163 are a pair of colliding spiral galaxies about 80 million light-years away in the constellation Canis Major.[1] Both galaxies were discovered by John Herschel in 1835.

So far four supernovae have been observed in NGC 2207.[2][3][4][5]

NGC 2207 is in the process of stripping IC 2163 of stars and material.[6]

Merging galaxies[change | change source]

NGC 2207 is in the process of colliding and merging with IC 2163. But unlike the Antennae or the Mice galaxies, they are still two separate spiral galaxies. They are only in the first step of colliding and merging. Soon they will collide, probably looking a bit more like the Mice Galaxies. In about a billion years time they are expected to merge and become an elliptical galaxy.

References[change | change source]

  1. Distance Results for NGC 2207. NASA/IPAC Extragalactic Database. [1]
  2. Kirshner, Robert P.; Arp H.C. & Dunlap J.R. (1976). "Observations of supernovae - 1975a in NGC 2207 and 1975b in the Perseus Cluster". Astrophysical Journal 207 (1): 44-52.. http://articles.adsabs.harvard.edu//full/1976ApJ...207...44K/0000044.000.html. 
  3. Jha S. et al (1999). "Supernova 1999ec in NGC 2207". IAUC 7269: 2. 
  4. van den Bergh, Sidney; Li, Weidong; Filippenko, Alexei V. (2003). "Classifications of the host galaxies of supernovae, set II". The Publications of the Astronomical Society of the Pacific 115 (813): 1280–88. doi:10.1086/379106. 
  5. Conseil E. et al (2013). "Supernova 2013ai in NGC 2207 = Psn J06161835-2122329". Central Bureau Electronic Telegrams (3431): 1. 
  6. Tidal stripping is when a larger galaxy pulls stars and other stellar material from a smaller galaxy.