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arXiv 1603.04728astro-ph.HEastro-ph.SR
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Iax型超新星SN 2015 H:一个白矮星爆燃候选者

The type Iax supernova, SN 2015H: a white dwarf deflagration candidate

M. R. Magee, R. Kotak, S. A. Sim, M. Kromer, D. Rabinowitz, S. J. Smartt, C. Baltay, H. C. Campbell, T. -W. Chen, M. Fink, A. Gal-Yam, L. Galbany, W. Hillebrand… 展开作者

M. R. Magee, R. Kotak, S. A. Sim, M. Kromer, D. Rabinowitz, S. J. Smartt, C. Baltay, H. C. Campbell, T. -W. Chen, M. Fink, A. Gal-Yam, L. Galbany, W. Hillebrandt, C. Inserra, E. Kankare, L. Le Guillou, J. D. Lyman, K. Maguire, R. Pakmor, F. K. Röpke, A. J. Ruiter, I. R. Seitenzahl, M. Sullivan, S. Valenti, D. R. Young

摘要:

我们目前的结果是基于SN 2015 H的观测,它属于类似SN 2002 cx的一小群天体,也被称为Iax型超新星。爆炸前深层成像的可用性使我们能够对爆炸时期进行严格的限制。我们的观测活动大约在爆炸后一天开始,并在最大光照后持续了约150天,使其成为迄今为止观测到的此类天体之一。我们发现峰值幅度M $_r$ = -17.27 $\pm$ 0.07,α($Δm_{15})_r$ = 0.69 $\pm$ 0.04。比较我们的观察到的合成光谱产生的模拟燃烧的Kracrasekhar质量的碳-氧白矮星,我们发现合理的协议与模型的弱爆燃,导致约0.2 M $_{\odot}$的材料含有约0.07 M $_{\odot}$的56镍喷射。然而,模型光变曲线的演变速度比观测结果更快,这表明更高的喷出物质量是有利的。然而,伪测辐射热光变曲线的经验模型表明,$\lesssim$ 0.6 M太阳的物质被喷射出来,这意味着白矮星没有完全被破坏,并且很可能是一个结合的残余物。

英文摘要:

We present results based on observations of SN 2015H which belongs to the small group of objects similar to SN 2002cx, otherwise known as type Iax supernovae. The availability of deep pre-explosion imaging allowed us to place tight constraints on the explosion epoch. Our observational campaign began approximately one day post-explosion, and extended over a period of about 150 days post maximum light, making it one of the best observed objects of this class to date. We find a peak magnitude of M$_r$ = -17.27 $\pm$ 0.07, and a ($Δm_{15})_r$ = 0.69 $\pm$ 0.04. Comparing our observations to synthetic spectra generated from simulations of deflagrations of Chandrasekhar mass carbon-oxygen white dwarfs, we find reasonable agreement with models of weak deflagrations that result in the ejection of ~0.2 M$_{\odot}$ of material containing ~0.07 M$_{\odot}$ of 56Ni. The model light curve however, evolves more rapidly than observations, suggesting that a higher ejecta mass is to be favoured. Nevertheless, empirical modelling of the pseudo-bolometric light curve suggests that $\lesssim$0.6 M_sun of material was ejected, implying that the white dwarf is not completely disrupted, and that a bound remnant is a likely outcome.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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