Ранние наблюдения сверхновой SN 2023ixf в галактике М101

Abstract

Supernova radiation measurements in the first hours after the explosion is one of the few ways to study such stars and their environment. We report simultaneous multi-frequency observations of a type II supernova (SN 2023ixf) in the M101 galaxy (at a distance of 6.85 ± 0.15 Mpc, beginning approximately 1.4 hours after the explosion. The parent star was a red supergiant with a radius 440 times more than the Sun. The light curves changed quickly, and were overall much dimmer and redder than the models predicted. This probably indicates an optically thick dust shell before its destruction by the shock wave. We believe that the breakthrough of the star’s shell and, possibly, the distribution of surrounding dust were spherically asymmetrical.

Измерение параметров излучения сверхновых в первые часы после взрыва - один из немногих способов исследования таких звезд и их окружения. Мы сообщаем об одновременных многочастотных наблюдениях сверхновой