OGLE-2013-SN-079: A LONELY SUPERNOVA CONSISTENT WITH A HELIUM SHELL DETONATION
OGLE-2013-SN-079: A LONELY SUPERNOVA CONSISTENT WITH A HELIUM SHELL DETONATION
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DOI：
10.1088/2041-8205/799/1/l2
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发表时间：
2014-10
期刊：
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通讯作者：
C. Inserra;S. Sim;L. Wyrzykowski;L. Wyrzykowski;S. Smartt;M. Fraser;M. Nicholl;K. Shen;A. Jerkstrand;A. Gal-yam;D. Howell;D. Howell;K. Maguire;P. Mazzali;S. Valenti;S. Valenti;S. Taubenberger;S. Benitez-Herrera;D. Bersier;N. Blagorodnova;H. Campbell;Ting-Wan Chen;N. Elias-Rosa;W. Hillebrandt;Z. Kostrzewa-Rutkowska;S. Kozłowski;M. Kromer;J. Lyman;J. Polshaw;F. Röpke;A. Ruiter;K. Smith;S. Spiro;M. Sullivan;O. Yaron;D. Young;F. Yuan
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文献类型：
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作者：
C. Inserra;S. Sim;L. Wyrzykowski;L. Wyrzykowski;S. Smartt;M. Fraser;M. Nicholl;K. Shen;A. Jerkstrand;A. Gal-yam;D. Howell;D. Howell;K. Maguire;P. Mazzali;S. Valenti;S. Valenti;S. Taubenberger;S. Benitez-Herrera;D. Bersier;N. Blagorodnova;H. Campbell;Ting-Wan Chen;N. Elias-Rosa;W. Hillebrandt;Z. Kostrzewa-Rutkowska;S. Kozłowski;M. Kromer;J. Lyman;J. Polshaw;F. Röpke;A. Ruiter;K. Smith;S. Spiro;M. Sullivan;O. Yaron;D. Young;F. Yuan
我们目前的观测数据，一个奇特的超新星发现的OGLE-IV调查，其次是公共ESO瞬态天体光谱调查。z = 0.07的红移意味着它的绝对星等在MI的静止坐标系I带，为17.6等，这使它的光度范围介于正常Ia型超新星和新星之间。光学和近红外光谱主要显示Ti和Ca线，以及在<5000 nm的静止波长处由于通量的强烈抑制而产生的不寻常的红色。迄今为止，这是唯一报道的SN显示Ti为主的光谱。这些数据与现有的低质量CO白色矮星周围氦壳纯爆轰模型和“双爆轰”模型基本一致，该模型包括CO核在上覆氦壳中主爆轰后的二次爆轰。
We present observational data for a peculiar supernova discovered by the OGLE-IV survey and followed by the Public ESO Spectroscopic Survey for Transient Objects. The inferred redshift of z = 0.07 implies an absolute magnitude in the rest-frame I-band of MI ∼ −17.6 mag. This places it in the luminosity range between normal Type Ia SNe and novae. Optical and near infrared spectroscopy reveal mostly Ti and Ca lines, and an unusually red color arising from strong depression of flux at rest wavelengths <5000 Å. To date, this is the only reported SN showing Ti-dominated spectra. The data are broadly consistent with existing models for the pure detonation of a helium shell around a low-mass CO white dwarf and “double-detonation” models that include a secondary detonation of a CO core following a primary detonation in an overlying helium shell.