The dwarf galaxy is a small galaxy consisting of several billion stars. They are difficult to detect because of their low luminosity, low mass, and small size. However, it is still difficult to understand how dwarf and giant galaxies gather their stars and evolve into modern galaxies.

The first multi-wave space observatory dedicated in India, Astrosate, solved this mystery. A team of scientists who use astrosate show how complex stars forming on the edge of the dwarf galaxy migrated towards the middle region and contribute to mass growth and luminosity.

The teams include astronomers from India, the United States and France. Professor Kanak Saha at the Inter-University Center for Astronomy and Astrophysics (IUCAA), Pune, compiled this research. Mr. Anshuman Borgohain is the main author of this paper.

According to scientists, “This process is important in understanding a greater picture of the growth and evolution of galaxies.”

The team analyzed 17 hours of observation data captured by the Ultraviolet Astrosate imaging telescope. They found evidence that this dwarf galaxy was a problem that increased from outside. They also watched it alive.

Prof. Saha said, “We witnessed the formation of ‘life’ from this distant dwarf galaxy! The power of Uvit settlement, and deep field imaging techniques has become the key to seeing some of the very young stars. This form is on the edge and then rotates to the limits (optics) seen from their galaxy in one billion years, thereby increasing the growth of galaxies. Most of our studies carefully calculate the time needed to migrate in galaxies. “

The team saw 11 blue dwarf galaxies which were 1.3-2.8 billion light years.

Prof. Saha stressed that “The main challenge is strongly building faint lump detection, very blue, and forming a very far star to see even though they have a million material mass in it.”

At a slightly larger distance, Uvit will not complete these galaxies, and we do not have an expanded disk example seen in UV in the current dwarf galaxy. This red dwarf shift has been optimal to investigate this lumpy blue structure on their edges. “

Another author of the author, Prof. Francoise Combes from Observatoire de Paris, France, further added that “This discovery taught us how surprising the stars that can be formed in a poor metal gas disk. Usually this dwarf galaxy is dominated by dark material, and gas disk will not be unstable. But our discovery is proof that even gas disk fragments like that. “

Prof. Bruce Elmegreen from IBM Watson Research Division, USA, which contributed to this study, said, “It has become a mystery of how some small galaxies like this can have an active star formation. This observation shows that gas enhancers on the outside that can be forced to move in the middle because of the inner torque given by giant gas and star complex. This migration builds central density during the lifetime of galaxy. “