Lisbon/Leiden – There are clusters of red-and-dead members of galaxies that used to be stars in the past, and have disintegrated or died. Lately, astronomers – David Sobral, at the University of Lisbon and Andra Stroe hailing from Leiden Observatory, observed that cosmic tsunamis can add life to dormant, inactive or dead galaxies in this universe.
The duo have come together and conducted a detailed research on the concepts pertaining to cosmic tsunamis. The study was published in the monthly version of Royal Astronomical Society journal.
This phenomenon has been in vogue for billions of years. Clusters of galaxies grow, expand substantially and merge with another. When two such galaxy clusters collide, loads of energy is generated massively. It leads to the birth of new-found stars, besides giving new life to a myriad of dormant galaxies. This concept is a cosmic tsunami, which went unnoticed till date.
Modes of observations
The duo researchers have come across merging galaxy clusters in outer space – CIZA J2242.8+5301, dubbed as “Sausage”, at a distance of 2.3 billion light-years, from the surface of the earth. The cosmic shock waves resulted in the formation of ‘alive’ stars.
Issac Newton Telescopes and William Herschel Telescopes present in La Palma and the Keck and Subaru Telescopes present in Hawaii were used to view the phenomenon.
In a statement, Stroe mentioned that previously, there was a common belief that galaxies don’t have many roles to play. He added that galaxies played the leading roles.
How did the star get reawakened?
Once-dead Sausage cluster are on the verge of becoming ‘alive’ at a tremendous pace. The collision happened such that the galaxies came close at 9 million kilometers for every hour.
There was turbulence in prevalent galactic gas. The galaxies witnessed an avalanche breakdown; cold and dense gas got formed, and thus ‘Sausage’ got reawakened.