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Tuesday, December 6, 2016

Calculated exact mass black hole at the center of the milky way


Most accurate to date estimate of the mass of the supermassive black hole Sagittarius A* at the center of our galaxy is held by a group of American and Spanish astrophysicists. Scientists estimate that a huge object in the center of the milky way heavier than the Sun 4.02 million times.


photo: pixabay.com

Sagittarius a is a compact radio source located in the center of the milky Way and radiating also in the infrared, x-ray and other bands. It is a supermassive object, surrounded by hot radio-emitting gas cloud. Although it is impossible to say with absolute certainty, scientists believe that Sagittarius A is a black hole.

Previously, the most accurate data about the alleged mass of a supermassive black hole was considered the figures provided by the specialists of the Institute for extraterrestrial physics, max Planck in December 2008 and the results of observations, conducted over 16 years. Then the experts came to the conclusion that the mass of an object is 4.31 ± 0,36 million solar masses. More accurate data was received by the international group with the help of the previously performed photometry of stars with low luminosity orbiting Sagittarius A*.

In the new study, astrophysicists said not only the mass of the black hole, but the distance from it to the Ground – it amounted to 7.86 kiloparsec, or about 25 636 light years.

It should be noted that the new study has not been published in any peer-reviewed publication and presented on the website of preprints arXiv.org.

Сверхмfссивными are considered to be black holes whose mass is much (100 thousand to 10 billion times) greater than the mass of the Sun. Such objects are often detected in the center of various galaxies and Central black holes have a significant attention to how these galaxies evolve.

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