ヘリウムに富んだ周周星物質を持つ Ia 型超新星

Erik C Kool¹, Joel Johansson^2,3, Jesper Sollerman²

¹The Oskar Klein Centre, Department of Astronomy, Stockholm University, AlbaNova, Stockholm, Sweden. erik.kool@astro.su.se.

Nature

|May 17, 2023

まとめ

天文学者たちは初めてIA型超新星 (SN Ia) の電波信号を検出し,ヘリウムに富んだ環状物質を明らかにした. この発見は宇宙爆発の単一変性原始モデルを支持します

科学分野:

天文学
天体物理学
宇宙学

背景:

Ia型超新星 (SNe Ia) は重要な宇宙爆発ですが,その祖先系はほとんど知られていません.
無線観測は祖先モデルを区別するための鍵であり,退化していない伴侶は検出可能な無線シンクロトロン放射を発生させるべきである.
SNe Iaの無線配列の探求は失敗し清潔な環境と退廃した仲間を示唆しています

研究の目的:

放射能を探してSN Iaの原始システムを調査する.
SN Iaの周回物質をスペクトルおよび赤外線分析によって特徴づけること.
Ia型超新星に対する単発変異原始モデルをテストする.

主な方法:

SN 2020eyjの無線観測を行った.
星周物質を特定するために分析されたスペクトル特徴と赤外線放射.
星周物質の起源を解釈するためにモデルを活用した.

主要な成果:

Ia型超新星 (SN 2020eyj) の無線対照の検出を初めて報告した.
SN 2020eyjを囲むヘリウムに富んだ星周物質を特定した.
観測された放射能と周回物質に基づいて先祖系を制限した.

結論:

検出された放射能とヘリウムに富んだ環状物質は,SN 2020eyjの単一退化原体系を支えている.
このシステムはヘリウムドナー星から白矮星が増殖している可能性が高い
将来の類似のSNe Iaのラジオフォローアップは,その祖先の起源に関する制約を洗練することができます.

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