An asymmetric energetic type Ic supernova viewed off-axis, and a link to gamma ray bursts |
| |
Authors: | Mazzali Paolo A Kawabata Koji S Maeda Keiichi Nomoto Ken'ichi Filippenko Alexei V Ramirez-Ruiz Enrico Benetti Stefano Pian Elena Deng Jinsong Tominaga Nozomu Ohyama Youichi Iye Masanori Foley Ryan J Matheson Thomas Wang Lifan Gal-Yam Avishay |
| |
Institution: | Department of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan. mazzali@ts.astro.it |
| |
Abstract: | Type Ic supernovae, the explosions after the core collapse of massive stars that have previously lost their hydrogen and helium envelopes, are particularly interesting because of their link with long-duration gamma ray bursts. Although indications exist that these explosions are aspherical, direct evidence has been missing. Late-time observations of supernova SN 2003jd, a luminous type Ic supernova, provide such evidence. Recent Subaru and Keck spectra reveal double-peaked profiles in the nebular lines of neutral oxygen and magnesium. These profiles are different from those of known type Ic supernovae, with or without a gamma ray burst, and they can be understood if SN 2003jd was an aspherical axisymmetric explosion viewed from near the equatorial plane. If SN 2003jd was associated with a gamma ray burst, we missed the burst because it was pointing away from us. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|