Discovery of a kilonova in a long gamma-ray burst GRB230307A

In recent years, it has become evident that there are gamma-ray bursts in which neutron stars merge with each other to produce large amounts of superheavy elements. A group including Dr. Hotokezaka observed the gamma-ray burst GRB230307A with JWST, showing that this burst was associated with a kilonova, which is an explosion of heavy elements. The result also suggested the possibility of the existence of one of heavy elements, tellurium. The result is published in Nature.