Kilonova and host galaxy
Kilonova and host galaxy
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The James Webb Space Telescope recently made an exciting discovery - detecting the rare element tellurium in the aftermath of two neutron stars merging.
The two neutron stars were once regular stars orbiting each other in a distant spiral galaxy. After each exploded into a supernova, their cores collapsed into neutron stars. The explosions propelled the pair out of their home galaxy. Hundreds of millions of years later, the neutron stars collided, creating an extremely bright gamma-ray burst (the second brightest burst ever recorded) and kilonova explosion.
Webb’s highly sensitive capabilities helped pinpoint the original home galaxy of the neutron stars - about 120,000 light-years from the collision site or the width of the Milky Way.
[The former host galaxy is the large spiral galaxy most centrally located in the image, and the gamma-ray burst appears as a small red dot near the top-left corner. See the reference image below.]
Release Date: October 25, 2023
Image courtesy of NASA, ESA/Webb
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