It is generally believed that Type Ia supernovae are thermonuclear explosions of carbon–oxygen white dwarfs (WDs). However, there is currently no consensus regarding the events leading to the explosion. A binary WD (WD–WD) merger is a p...
H. Sano   H. Yamaguchi   M. Aruga   Y. Fukui   K. Tachihara   M. D. Filipović   G. Rowell   
The Astrophysical Journal 933(2) 157-157 2022年7月
Abstract
We report new H i observations of the Type Ia supernova remnant (SNR) SN 1006 using the Australia Telescope Compact Array with an angular resolution of (∼2 pc at the ...
Publications of the Astronomical Society of Japan 73(5) 1405-1417 2021年10月 [査読有り]
Abstract
We discover an unidentified strong emission feature in the X-ray spectrum of EXO 1745−248 obtained by RXTE at 40 hr after the peak of a superburst. The structure was centered at 6.6 keV and significantly broadened with a large equivalen...
Yuken Ohshiro   Hiroya Yamaguchi   Shing-Chi Leung   Ken’ichi Nomoto   Toshiki Sato   Takaaki Tanaka   Hiromichi Okon   Robert Fisher   Robert Petre   Brian J. Williams   
The Astrophysical Journal Letters 913(2) L34-L34 2021年6月 [査読有り]
Abstract
The supernova remnant (SNR) 3C 397 is thought to originate from a Type Ia supernova (SN Ia) explosion of a near-Chandrasekhar-mass (MCh) progenitor, based on the enhanced abundances of Mn and Ni revealed by previous X-ray stu...
Hiroya Yamaguchi   Fabio Acero   Chuan-Jui Li   You-Hua Chu   
The Astrophysical Journal Letters 910(2) L24-L24 2021年4月 [査読有り]
Abstract
The geometric structure of supernova remnants (SNR) provides a clue to unveiling the pre-explosion evolution of their progenitors. Here we present an X-ray study of N103B (0509–68.7), a Type Ia SNR in the Large Magellanic Cloud, that is...