Indian Astronomers Discover Supercluster of Galaxies, Name It ‘Saraswati’
A team of astronomers from India discovered an extremely large supergroup of galaxies – as large as 20 million billion soles – named Saraswati, the Inter-University Center for Astronomy and Astrophysics (IUCAA) based in Pune.
This is one of the largest known structures in the vicinity of the universe, 4000 million light years from Earth and about 10 billion years, IUCAA said.
Its mass extends 600 million light-years away, he said.
Scientists at this institute also participated in the discovery of last year’s gravitational waves.
The supergroup was discovered by Joydeep Bagchi, a faculty member at IUCCA; Shishir Sankhyayan, PhD student at the Indian Institute of Education and Research Sciences (IISER), Pune; Prakash Sarkar of the National Institute of Technology, Jamshedpur; Somak Raychaudhury, Director IUCAA; Joe Jacob of Newman College, Kerala and Pratik Dabhade, IUCAA researcher.
Their findings were published in the latest issue of The Astrophysical Journal, the first research journal of the American Astronomical Society.
“Large sets are the largest coherent structures of the cosmic network. They are a chain of galaxies and galaxies, bound by gravity, often extending to several hundred times the size of galaxy clusters, made up of tens of thousands of Galaxies, “IUCAA said in a statement.
Sankhyayan said that the “newly discovered Saraswati super-clusterter” spreads on a scale of 600 million light-years and may contain the mass equivalent of more than 20 billion soles.
A cluster of galaxies could have 1000-10 000. A super cluster can have groups of 40 to 43, he added.
“Our own galaxy is part of a group called super supergroup Laniakea,” IUCAA said.
Bagchi, IUCAA, lead author of the article in the journal, and co-author Sankhyayan said they were “surprised to discover this gigantic super-group of galaxies,” visible in a large spectroscopic study of distant galaxies known as the digital Sloan Sky Survey.
Sankhyayan said the data were analyzed, after which the discovery was made.
“This super-cluster is clearly integrated into a large network of cosmic filaments drawn by clusters and large gaps,” said M. Bagchi.
It has been previously said that he had reported “only a few relatively large super sets”, such as the concentration of Shapley or Great Wall Sloan in the nearby universe.