Tuesday, June 22, 2010

Findings superstar Threatens Black Hole Theory

A neutron star with strong magnetic fields and stellar evolution theory threatens the birth of black holes (black holes). 

Magnetar is located in the cluster of stars, a distance of Westerlund 1 16 000 light years from Earth, precisely in the constellation Ara, the Altar. 

Westerlund 1 was discovered in 1961 by Swedish astronomer. Westerlund 1 is one of the largest star clusters in the Milky Way - consisted of hundreds of massive stars - among them shine with the brilliance of nearly a million times the Sun. Some stars even 2000 times the size of the diameter of the Sun. 

In the standard universe, the cluster is still a very young age. The stars were born in a single event, approximately 3.5 million to 5 million years ago. 

Westerlund 1 is the remains of some galactic magnetar - a certain type of neutron star formed from a supernova explosion - which could use a million magnetic fields, billions of times stronger than Earth's. 

Westerlund star who eventually became the magnetar must have at least 40 times the mass of the Sun. Thus according to a study published in the journal Astronomy and Astrophysics. 

Several questions then arise. The main assumption is that the star evolved between 10 and 25 solar masses will form neutron stars. 

Meanwhile, the star of over 25 times the mass of the Sun will produce a black hole (black hole) - gravitational monster that is formed when a dying star, then collapses in on itself. 

According to this assumption, the parent magnetar should have become a black hole - because of their large size. 

But according to scientists, there are alternatives. That the stars 'worn at the edges' to the lower masses, enabling him to be a neutron star. 

How did that happen? The answer, the report said, lies in the binary system: a magnetar birth of stars and other stellar companion. 

When developed, they began to interact, like the evil twin - the companion star's mass theft of his ancestors. Until finally exploding into a supernova star ancestors. 

In theory, this pair apart by the blast and the two stars were ejected from the cluster, leaving only remnants of a magnetar incandescent. 

"If true, this indicates that the binary system may play a key role in the evolution of stars," said Simon Clark, who led the team. 

The scientists used the European Southern Observatory telescope at the Paranal, Chile, to make observations. 

This binary system can be described as "cosmic diet plan''for the heavyweight star, which could lose more than 95 percent of their initial mass," he said. (Telegraph)

YDH

Author & Editor

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