Black Holes Growing At Faster Pace Than Expected: Astronomers

Swinburne University of Technology astronomers revealed that black holes, which sit in between various galaxies were growing at much faster pace than expected.

Jan 18, 2013 13:43 IST
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Astronomers had already discovered that the super-massive black holes which sit in the centres of various galaxies were growing faster. But as per the new observations conducted by Swinburne University of Technology, astronomers revealed that these black holes were growing at much faster pace than expected.

Professor Alister Graham from Swinburne's Technology's Centre for Astrophysics and Supercomputing explained that different galaxies competed with each other for available gases, for either creating new stars or for the purpose of feeding central black hole. For over 10 years, the leading theories as well as the models facilitated fixed fraction of gas to each of this process, thereby safeguarding the ratio of black hole mass to galaxy mass.

Professor Graham explained that every time there is a ten times increase in the stellar mass of the galaxy, it leads to around 100 times increase in the mass of black hole.

Apart from this concept, the researchers also found an existence of opposite behaviour which was present among the crammed clusters of stars that are found in the centres of small galaxies as well as disk galaxies such as Milky Way.
Smaller galaxies meant that there would be greater fraction of stars in the dense and compact clusters. In galaxies that have lower mass, the star clusters which can hold on millions of stars, dominate over these black holes. Initially, it was supposed that star clusters had a constant 0.2 percent of the mass of a galaxy.

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