How To Transfer Music From Ipod To Shareaza

Gigantesco anello di buchi neri in Arp 147

The new composite image provided by NASA, shows nine X-ray sources scattered around the ring of Arp 147, are so bright as to be blacks holes, with masses from 10 to 20 times the Sun

This composite image of Arp 147, shows a pair of interacting galaxies, located about 430 million light years from Earth, shown by NASA's Chandra X-ray X-ray Observatory (in pink) and optical data of the Hubble Space Telescope (in red, green, blue) manufactured by the Space Telescope Science Institute (STScI) in Baltimore, Maryland.

Arp 147 contains the remains of a spiral galaxy (right) that collided with the elliptical galaxy on the left. This collision has produced a growing wave of star formation that looks like a blue ring that contains an abundance of young massive stars. These rapid stellar evolution, has brought in a few million years, some of them to explode as supernovae, leaving behind neutron stars and holes blacks.

A fraction of blacks holes and neutron stars have companion stars and can become bright X-ray sources, and attract them their matter. The nine X-ray sources scattered around the ring in Arp 147 are so bright that blacks must be holes, with masses that are probably 10 to 20 times the Sun

An X-ray source was detected also in the left red nucleus of the galaxy and can be powered by a supermassive black hole malnourished. This source is not evident in the composite, but it is clearly visible in the X-ray images Other foreign objects in Arp 147 are visible in the photo, like a star in the foreground in the lower left and a quasar in the background represented in pink in the upper left corner of the galaxy red.

The infrared observations with the NASA Spitzer Space Telescope and ultraviolet observations with NASA Galaxy Evolution Explorer (GALEX) allowed estimates of the rate of star formation in the ring. These estimates, combined with the use of models for the evolution of binary stars, allowed the authors to conclude that the most intense star formation has to be expiring around 15 million years ago.

By Arthur McPaul


Fonte1
Fonte2