Kilonova
Neutron star collision supernova
Nº Q14468623 ★★
Uncommon · History
Kilonova
Neutron star collision supernova
A kilonova (also called a macronova) is a transient astronomical event that occurs in a compact binary system when two neutron stars (BNS) or a neutron star and a black hole collide. The kilonova, visible over the weeks and months following the merger, is an isotropically expanding luminous afterglow of electromagnetic radiation emitted by the radioactive decay of r-process nuclei synthesized by—and then ejected from—the initial cataclysmic event.
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From Wikipedia
A kilonova (also called a macronova) is a transient astronomical event that occurs in a compact binary system when two neutron stars (BNS) or a neutron star and a black hole collide. The kilonova, visible over the weeks and months following the merger, is an isotropically expanding luminous afterglow of electromagnetic radiation emitted by the radioactive decay of r-process nuclei synthesized by—and then ejected from—the initial cataclysmic event. The high sphericity of kilonovae through its early epochs was deduced from the blackbody nature of the spectrum observed for GW170817 / AT2017gfo, the only BNS merger that has been definitively localized as of June 2026.
Text: Wikipédia, CC BY-SA 4.0. · Image: University of Warwick/Mark Garlick (CC BY 4.0) ·
