Indian scientists find out how dwarf galaxies develop

Small or dwarf galaxies play an important role in the formation of our universe. A group of Indian astronomers has provided an important link to draw a big picture of the growth of these galaxies. Using India’s first space observatory AstroSat, astrophysicists from IUCAA Pune and their colleagues in the US and France have shown how star-forming material on the outskirts of a dwarf galaxy migrates to the galaxy’s central region. Are. She contributes to its development with her mass and luminosity.

Deccan Herald’s Report According to, in the last two decades, with the help of high-quality telescopes, scientists have been helped to closely understand our galaxy ie Milky-Way and other large galaxies. Scientists know that massive galaxies are surrounded by many dwarf galaxies.

The shape of dwarf galaxies is irregular. They make stars. Their mass may be 50 times less than that of our Milky Way. How dwarf and large galaxies collect their stars and evolve themselves is still a puzzle. Scientists seem to have solved this puzzle in the case of dwarf galaxies.

IUCAA scientist Kanak Saha, his PhD student Anshuman Borgohain and colleagues in Paris and elsewhere decided to examine 17 hours of observational data captured by Astrosat’s Ultraviolet Imaging Telescope. The team of researchers looked at 11 blue dwarf galaxies, which are 1.3 to 2.8 billion light-years away from Earth. The main challenge before scientists was to find star-forming clusters, which were very distant, but contained material as much as a million solar masses. Scientists have understood that those ‘clusters’ of massive star formation form on a periphery and then join the Milky Way within a certain time, from which the Milky Way develops.

Kanak Saha told Deccan Herald that we have found evidence that these dwarf galaxies are accumulating matter from outside. They have observed ‘live’ formation of these distant dwarf galaxies. These findings have been published in Nature magazine last week.