Nine young stars absorbed their planets

14.02.2011

When tireless Hubble Space Telescope discovered in the star cluster NGC 3603 nine young stars, astronomers did not immediately find an explanation of their unusually low temperatures.


It was pretty cool stars with temperatures of 1700-2200 K. By itself, the lowest temperature of the star is surprising is not it peculiar brown dwarfs, whose weight varies in the range between the mass of the planets and the stars starting weight. What was surprising was the other — a cluster is at a distance of 20 million light years, and at this distance the brown dwarf is indistinguishable because of its dimness.

In his article, which should appear in the next issue of The Astrophysical Journal, a group of Dutch researchers led by Loredana Spezza (Loredana Spezzi) of the European Space Agency offered an explanation of this mystery, which they consider only one possible.

According to them, these stars are not dwarfs, and it is quite normal with young stars is not such a cold temperature. First, in the form planets around them, and then they are the planets with a giant speed swallowed. As a result, stars have increased in size, and the atmosphere around them was formed from the remains of the planets, which, of course, much cooler stellar temperatures.

Scientists believe that this is such a star system, which first generates the planet, and then quickly consume them. They called such stars blotarami (from the English word bloat — swell).

Existing theories of planet formation involve a scenario in which the planets formed in some cases begin to spiral closer to its star to be absorbed by it. However, no one ever has not seen such a voracious stars like these.

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