Dead Galaxy

A dead galaxy apparently red in color is spotted recently and is considered around 1.65 billion years old. This galaxy is at least 3 times the weight of Milky Way but has stopped forming stars inside it.

The main mystery related to this galaxy is that this galaxy formed in such a short span of time and then stopped churning up stars very soon. The reports in Nature magazine by Peter Behroozi of the University of California said, “The team has found an extreme galaxy, which is exciting. The galaxy is certainly not typical, but it is consistent with the broad diversity of galaxies coming out of theoretical models.” The data was studied by Karl Glazebrook of Swinburne University of Australia who used the Keck Observatory in Hawaii to study the spectrum. According to his conclusions, the galaxy did, in fact, exist in the early universe and revealed that it had stopped making stars 500 million to a billion years before its age was observed. The data also concluded that the galaxy had the ability to create more than 1,000 suns per year whereas typical normal galaxies have the ability to generate less than 100 suns annually. At such rate of growth, the galaxy would have grown into enormous size to result in collision or merge with other galaxies. Such major merger can stir up and compress gas to high densities within a small area which might cause short bursts. Such intense star formations lead the galaxy to run out of gas and therefore the star formation stops. Such hefty galaxies should be rare because galaxies form as matter pools together and collapses due to gravity over cosmic time. The galaxy is named ZF-COSMOS-20115 and this data related to the galaxy might help researchers to look deep into the formation of universe in the future and provide accurate theories.

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