{"id":1311,"date":"2022-11-22T09:44:20","date_gmt":"2022-11-22T14:44:20","guid":{"rendered":"https:\/\/techfragments.com\/?p=1311"},"modified":"2022-11-22T16:37:25","modified_gmt":"2022-11-22T21:37:25","slug":"short-gamma-ray-bursts-young-galaxies","status":"publish","type":"post","link":"https:\/\/techfragments.com\/short-gamma-ray-bursts-young-galaxies\/","title":{"rendered":"Short Gamma-ray Bursts Come Mostly From Actively Star-forming\u00a0Galaxies"},"content":{"rendered":"

The most thorough list yet of the galaxies from which short gamma-ray<\/a> bursts (SGRBs) originate has been created by a team of astronomers led by Northwestern University. Researchers used a variety of sensitive instruments and advanced galaxy modelling to find the host galaxies for 84 SGRBs. They then looked at the properties of 69 of the host galaxies they found.<\/p>\n

They found, among other things, that roughly 85% of the SGRBs under study originate from young, star-forming galaxies. The astronomers also discovered that more short gamma-ray bursts occurred at earlier times when the universe was much younger \u2014 and at greater distances from the centers of their host galaxies \u2014 than previously thought.<\/p>\n

Several SGRBs were unexpectedly discovered outside the host galaxies as if they had been “kicked out,” which begs the question of how they were able to travel so far.<\/p>\n

Advancing Short Gamma-ray Bursts Knowledge<\/h2>\n
\"short-gamma-ray-bursts

The mass-weighted ages (tm ) of short GRB hosts normalized by the age of the universe at their redshift (tH (z)) vs. redshifts, color-coded by their host type (blue is star-forming, yellow is transitioning, and red is quiescent).
Credit: Anya E. Nugent et al. ApJ 940 57 CC-BY<\/p><\/div>\n

The research team anticipates that since this is the largest catalog of SGRB host galaxies to have ever existed, it will serve as the gold standard for a very long time.<\/p>\n

“Building this catalog and finally having enough host galaxies to see patterns and draw significant conclusions is exactly what the field needed to push our understanding of these fantastic events and what happens to stars after they die,”<\/p><\/blockquote>\n

said Anya Nugent, a Northwestern graduate student who led the study. The team will publish two papers that will go over the new catalog in detail. Both will appear in The Astrophysical Journal<\/em>.<\/p>\n

Broadband Repository for Investigating Gamma-ray burst Host Traits<\/h3>\n

Due to the fact that short gamma-ray bursts are among the brightest explosions in the universe, the team has dubbed its catalog BRIGHT (Broadband Repository for Investigating Gamma-ray burst Host Traits). All of BRIGHT’s data and modelling products are available for public use online<\/a>.<\/p>\n

When two neutron stars collide<\/a>, they produce brief bursts of intense gamma-ray light called short gamma-ray bursts. While gamma rays last only a few seconds, optical light can last for hours before fading below detection levels -an event called an afterglow.<\/p>\n

SGRBs are some of the brightest explosions in the universe, with only a few dozen detected and pinpointed each year. At the moment, they are the only way to study and understand a large number of neutron star systems merging.<\/p>\n

GRB 170817A Neutron Star Merger Link<\/h2>\n