Stars of the vampire found in the heart of our galaxy


13/06/2011

These cannibals are stealing life energy from other stars, which explains their unusually youthful appearance. Star vampires - the heavenly bodies, sucking the life out of other stars were first discovered in the center of the Milky Way.

They are called blue stragglers stars. They look extremely youthful, compared to other stars, because they are hot, and so are younger and their radiation is shifted towards the blue.

Astronomers believe that blue stragglers stars look so young because they steal hydrogen fuel from their victims, perhaps after a clash with them.

These stars are cannibals can often be found in dense star clusters, where it is easy to profit at the expense of the neighbor. But now scientists have found blue stragglers strangers in the Milky Way galactic bulge (dense region surrounding the nucleus in the center of the galaxy, consisting of gas and stars).

"Astronomers have long suspected the existence of blue stragglers strangers in the bulge, but no one knew about their number," - said Will Clarkson, an astronomer at the University of California and Indiana.

"Finally, we were able to demonstrate that they are there."

Using Hubble, astronomers observed the 180,000 stars in and around the bulge. The team discovered 42 unusually blue stars that looked much younger than their neighbors.

Of the 42 stars, according to researchers, from 18 to 37 are the real stars of blue stragglers, aged from 10 to 11 billion years.

"We still do not know much about how these stragglers were formed blue stars," - said Clarkson.

"Their detection in the bulge provides another set of constraints that will allow us to refine our models of their formation."

Original: News.nationalgeographic


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