Expected Hard X-Ray and Soft Gamma-Ray from Supernovae

• Main Authors: Keiichi Maeda, Yukikatsu Terada, Aya Bamba
• Format: Article
• Language: English
• Published: CTU Central Library 2014-12-01
• Series: Acta Polytechnica CTU Proceedings
• Online Access: https://ojs.cvut.cz/ojs/index.php/APP/article/view/2388

High energy emissions from supernovae (SNe), originated from newly formed radioactive species, provide direct evidence of nucleosynthesis at SN explosions. However, observational diculties in the MeV range have so far allowed the signal detected only from the extremely nearby core-collapse SN 1987A. No solid detection has been reported for thermonuclear SNe Ia, despite the importance of the direct conrmation of the formation of ⁵⁶Ni, which is believed to be a key ingredient in their nature as distance indicators. In this paper, we show that the new generation hard X-ray and soft gamma-ray instruments, on board Astro-H and NuStar, are capable of detecting the signal, at least at a pace of once in a few years, opening up this new window for studying SN explosion and nucleosynthesis.