Finding Hubble Mysterious Blue Star Disc Surrounding a giant black holes.
“The stars are blue in the disk’s life is very short, unlike the history of Andromeda that was 12 billion years in which such short-lived disk would appear now,” said Lauer. “That’s why we think that the mechanism that forms a disk of stars may be forming another disk of stars in the past and will trigger the same thing again in the future. But we still do not know, how in the beginning of a disc can be formed. This is still an enigma. “
Hubble astronomers praised the supervision of finding the disk. “Only Hubble has the resolution of the blue light to observe this dish,” said team member Richard Green of the National Optical Astronomy Observatory in Tucson. “Very small and very clearly from the surrounding red stars that we can use to delve into the heart of the very dynamic of Andromeda. This observation was made by a member of our team that makes the STIS. We designed it with a channel that can seem, especially to capture events like this – to measure starlight closer to a black hole rather than all the other galaxies outside our galaxy. “
Solid evidence for black holes in addition to the discovery of giant disk of stars, astronomers use a strange sight at Andromeda to prove that it is clear that as the host galaxy at the center of a black hole. In 1988, the independent studies, John Kormendy and the team of Alan Dressler and Douglas Richstone discovered a central dark object in Andromeda that they believed was a super massive black hole. This is the first case of what are now 40 black hole detection, most of them were observed by Hubble. The observations were, however, must not ignore the other, very strange, and seemed not far away, an alternative. “It is encouraging to believe that super massive black hole,” says Kormendy. “But it takes an extreme statement of the evidence is very strong. We believe that this black hole-black hole and not a collection of black and the stars die. “
Andromeda STIS observations of the astronomers were so accurate that eliminate all other possibilities of what it called the center of the black body. They also considered that the mass of the black hole The sun is 140 million, which is three times larger than previously thought.
So far, the black group would have been ruled out in only two galaxies, NGC 4258 and our galaxy, the Milky Way. “These two galaxies give us a very clear evidence that black holes really exist,” Kormendy added. “But both are special cases – NGC 4258 contains a disk of water masses that we observe with radio telescopes, and our galactic center is very close so we can follow individual stellar orbits. Andromeda is the first galaxies that we can set aside from all the bizarre possibility of black hole using Hubble and using the same technique as when we find most of the super giant black hole. “