Photo: NASA / ESA / the Hubble Heritage Team (STScI/AURA)
An international group of scientists have found a new explanation for why some galaxies die for no apparent reason, that is, they completely stopped the process of star formation. According to the findings of astronomers, this is due to the fact that the stellar wind emanating from the dense clusters of stars from the galaxy blows out all the gas. Article researchers published in The Astrophysical Journal.
According to the traditional hypothesis, galaxies can lose the necessary for star formation the gas due to the active nuclei, which releases enormous amounts of energy because of the feeding of a supermassive black hole. However, in 2007 astronomers discovered a galaxy in which stars are not born, but there was no sign of the existence of active nuclei in them.
The researchers studied these galaxies using the Hubble Space Telescope and found that they are huge stellar density. They are as massive as the milky Way, however, all their mass is concentrated in a region with a diameter of about a thousand light-years. Such a dense arrangement of stars creates a powerful stream of particles, collecting the molecules of the gas in the intergalactic medium. As a result, the galaxy evaporates all the substance needed for the birth of new stars.
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