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New class of stellar system called 'blue blobs' found: Research

  • Published
    25th Jun, 2022
Context

According to the researchers at University of Arizona, a new class of stellar systems has been identified- they’re not quite galaxies and only exist in isolation.

About

About the new class of stellar systems

  • The new stellar systems appear as "blue blobs" through a telescope.
  • They are about the size of tiny dwarf galaxies.
  • The new stellar systems contain only young, blue stars, and are about the size of tiny dwarf galaxies.
  • The blue stars are distributed in an irregular pattern and seem to exist in surprising isolation from any potential parent galaxy.

Where are the Stellar Systems Located?

  • The stellar systems are located within the relatively nearby Virgo galaxy cluster.
  • It is challenging to identify the origins of the five systems because they are separated from any potential parent galaxies by over 300,000 light years in some cases.
  • The fact that the new stellar systems are abundant in metals hints at how they might have formed.

Difference between Stars Born Red and Blue Stars

  • Stars that are born red are lower mass and therefore live longer than blue stars, which burn fast and die young.
  • Therefore, old red stars are usually the last ones left living. The blue stars are dead because they do not have any more gas with which to form new stars. 
  • The blue stars are like an oasis in the desert. 
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