viernes, 17 de octubre de 2014

Discover supermassive black hole

A team of astronomers from Mexico, UK, Chile and the United States discovered" might be the most massive black hole in the nearby Universe ", reported the Institute of Astrophysics of Mexico.

This supermassive hole, located in the galaxy Holm 15A, may have a greater mass of 10,000 million times the Sun, and even be comparable to that of our entire galaxy, the institution said in a statement.

Black holes "are more common than we thought," said Dr. Omar López-Cruz, researcher at the National Institute of Astrophysics, Optics and Electronics (INAOE) and project leader.

These objects, "very compact and massive," occur because the escape velocity is greater than the speed of light and thus become places where not even light can escape, he said.

Each galaxy, he said, "could have a black hole in the center. Milky Way, for example, can have a black hole roughly five million solar masses," a pairing that follows the "scaling laws" is you say is the bigger the galaxy, the bigger the corresponding black hole.

The germ of the discovery of the researcher and his team, which will be reported in the next two months in the Astrophysical Journal Letters, has its origin in the doctoral thesis of López-Cruz, through which had an initial meeting with Holm galaxy 15A, located in the cluster Abell 85.

Then noticed it was "rare" in the sense that its central part was very flat, but by that time there "had to compare it," recalled the researcher.

The situation changed when another group of American colleagues discovered in 2012, a galaxy which they described as "the flattest seen so far."

Through observations from databases and other radio telescopes, X-ray, optical and infrared, López-Cruz found that the Holm 15A, formed from "eat and devour other galaxies," has "central to most TV and bigger, "18 times the average, and has indicators that have a ultramassive hole.

Moreover, the team is proposing new observations to check if two black holes instead of one, on the theory that "the flat parts of the galaxy are produced by two binary black holes orbiting each other, they begin to disperse nearby stars and deflect the center of the galaxy. "

Thus, the finding reinforces previous astronomical discoveries, such as Dr. John G. Hoessel contributed in 1980, and argued that this galaxy was "special"; a figure that remained as a mere "curiosity" to date.

The investigation of López-Cruz does not end here, since it notes that another galaxy discovered that "marks the breaking of the scaling laws to the proposed time" with the mass of black holes with the properties of the galaxy was related in those found.

In the report the discovery team, plus López-Cruz, Christopher Añorve are Hector Ibarra Medel, M. Birkinshaw teachers and DM Worrall, Wayne A. Barkhouse, Juan Pablo Torres and Veronica Motta Papaqui.

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