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: http://www.sao.ru/Doc-en/SciNews/2015/Fabrika/
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New LBV Stars in the Andromeda Galaxy |
Russian version |
Two new LBV stars have been discovered in the Andromeda Galaxy. Since the
middle of the last century, only four such objects had been known in this
galaxy, they were discovered by American scientists Edwin Hubble and Allan
Sandage with colleagues. Astronomers from SAO added two more stars to this
list in 2015. LBV stars (Luminous Blue Variables) are very massive, they are
born with masses greater than 50 solar masses. These stars are very rare:
for each such a star with a mass of more than 50 solar masses, over 30000
less massive stars are born. Once the hydrogen thermonuclear fuel comes to
the end in the center of very massive stars, the stars strongly change their
brightness, and after a few ten thousand years they blow up as supernovae.
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