The origin of ULXs is a puzzle as well. Supernovae, the explosive - TopicsExpress



          

The origin of ULXs is a puzzle as well. Supernovae, the explosive deaths of massive stars, can make stellar-mass-sized black holes, but how they then grow to ULX-size is not understood. Astronomers nevertheless think that, if they are on the right track, star formation activity could be a signpost for ULXs because supernovae are short-lived young stars. Indeed, observations of ULXs indicate that they are ten times more likely to be found in star forming galaxies than in old, red galaxies. #jCp
Posted on: Mon, 22 Dec 2014 14:16:17 +0000

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