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New Galaxy Images From the Most Powerful Telescopes Reveal a Fitful Start to the Universe - SciTechDaily
Oct 21, 2021 2 mins, 29 secs

New images have revealed detailed clues about how the first stars and structures were formed in the Universe and suggest the formation of the galaxy got off to a fitful start.

This has revealed the formation of the galaxy was likely to be fitful.

Concerning the how, one possibility is that the formation of the first stars within galaxies started at a steady pace, slowly building up a more and more massive system.

Or the formation could have been jerky, with bursts of star formation producing incredibly large stars that disrupt the galaxy and make it cease its activity for a while or even forever.

Using the gravitational lensing power of some of the Universe’s most massive galaxy clusters with the exceptional GTC data coming from a project entitled the Survey for high-z Red and Dead Sources (SHARDS) the astronomers searched for nearby analogs of the very first galaxies formed in the Universe, so that they could be studied in much more detail.

The study showed that the formation of the galaxy was likely to be stop-start with bursts of activity followed by lulls.

Dr Griffiths from the University of Nottingham said: “Our main result is that the start of galaxy formation is fitful, like a jerky car engine, with periods of enhanced star formation followed by sleepy intervals.

It is unlikely that galaxy mergers have played a substantial role in the triggering of these bursts of star formation and it is more likely due to alternative causes that enhance gas accretion, we need to search for those alternatives.

“We were able to find these objects due to the high quality SHARDS data coupled with imaging data from the Hubble Space Telescope to detect hot gas heated by newly formed stars in very small galaxies.

“The SHARDS Frontier Fields observations carried out with GTC have provided the deepest data ever taken for discovering dwarf galaxies through their emission lines, allowing us to identify systems with recently triggered star formation,” adds Pérez-González, one of the co-authors of the paper and principal investigator of the GTC SHARDS Frontier Fields project.

Reference: “Emission Line Galaxies in the SHARDS Frontier Fields I: Candidate Selection and the Discovery of Bursty Ha Emitters” by Alex Griffiths, Christopher J Conselice, Leonardo Ferreira, Daniel Ceverino, Daniel Rosa-González, Marc Huertas-Company, Belén Alcalde Pampliega, Pablo G Pérez-González, Helena Dominguez Sanchez and Olga Vega, 20 October 2021, Monthly Notices of the Royal Astronomical Society.

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present between two serial star forming steps in early galaxies when first stars formed.The alternative causes in gas accretuon at event horizon of SMBH is present but to be defind by proper illustrations by mmore future discoveries

October 19, 2021

October 19, 2021

October 19, 2021

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