Wednesday, May 28, 2008

Astronomers Image Dying Supergiant Star

Universe Today reports Astronomers Image Dying Supergiant Star "For the first time, a team of astronomers has taken a close-up image of an individual dying supergiant star, WHO G64, in a neighboring galaxy, the Large Magellanic Cloud, about 160,000 light years distant. Researchers have been trying for decades to look closely at how aging stars lose a considerable amount of their mass before they go supernova. But this is difficult because of the great distances. However, by combining two 8.2m telescopes in Chile as an interferometer, they achieved the resolving power of a 60-m telescope. With this super-sharp view, they discovered that the dying supergiant star is developing a thick dust torus around it. They estimated that the star had an initial mass of about 25 times the mass of our sun. But now, the star is shedding material so rapidly that it has already lost 10 - 40% of its initial mass and is speeding toward its final fate as a supernova [in a few thousand years]."

wohg64location_spitzer_hires-580x527 1.jpg

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