joigus Posted July 15, 2020 Share Posted July 15, 2020 (edited) Hi again. I hope everybody is well. Without further ado, is there any appreciable difference between matter that has gravitationally collapsed from a primeval cluster made up of mostly hydrogen and matter that has collapsed several times within a certain galactic region? I suppose matter that collapses again and again in regions where many supernova explosions have taken place before would be richer in heavy elements. Could the wild variation in the types of stars as reflected in the Hertzsprung-Russell diagram reflect this variation in the "degree of collapse" that there is in the universe? My intuition tells me that, if all stars had started up from a universal prototype cloud of mostly pure hydrogen (only varying in clustering size) the kinds of stars that would give us would nicely group into a 1-parameter curve in the Hertzsprung-Russell diagram. I have no mathematical proof for that, but it seems right (angular momentum, temperature, etc. are there too, so I'm aware that it may be an oversimplification). The fact that they don't, strongly suggests that matter in different parts of the universe collapses from very different samples of stellar debris. Some of them loaded with heavy elements, which would reflect in a very different nature of star formation. Does that make sense? Is there any hint of an answer that you know of or can point to? Thank you very much. Edit: By "collapsing" I don't mean black holes, I mean stellar formation. Sorry for possible confusion. Edited July 15, 2020 by joigus clarification Link to comment Share on other sites More sharing options...
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