February 12, 2009

UCD galaxies

Writing about web page http://www.ras.org.uk/index.php?option=com_content&task=view&id=1556&Itemid=2

astrophysicists from Germany have concluded that in the early universe stars which made up UCDs (Ultra Compact Dwarf galaxies) were 1000 times closer to each other than the relative distances to nearest stars from our solar system.
it does not come as a surprise though that the UCDs have greater mass than spectroscopy might suggest, i.e. massive black holes might be the key to this problem. it is quite an accurate suggestion as the stars were packed so close that they would form more massive stars that would burn out of hydrogen much quicker, ending their lives as supernovae. the remnants of these great explosions are the neutron stars or black holes yet closely packed inside of the space which is 1/1000th of the size of our Milky Way.

follow the link for more details,

Vlad.


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