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| 題名: | The type Iax supernova, SN 2015H: A white dwarf deflagration candidate |
| 作者: | 陳婷琬;Magee, M. R.;Kotak, R.;Sim, S. A.;Kromer, M.;Rabinowitz, D.;Smartt, S. J.;Baltay, C.;Campbell, H. C.;Chen, T.-W.;Fink, M.;Gal-Yam, A.;Galbany, L.;Hillebrandt, W.;Inserra, C.;Kankare, E.;Le Guillou, L.;Lyman, J. D.;Maguire, K.;Pakmor, R.;Röpke, F. K.;Ruiter, A. J.;Seitenzahl, I. R.;Sullivan, M.;Valenti, S.;Young, D. R. |
| 貢獻者: | 理學院天文研究所 |
| 關鍵詞: | Astronomy;Astrophysics;Deflagration;Ejection;Explosions;High Energy Astrophysical Phenomena;Light curve;Physics;Solar and Stellar Astrophysics;Spectra;Supernovae;supernovae: general;supernovae: individual: SN 2015H;White dwarf stars |
| 日期: | 2016-05-01 |
| 上傳時間: | 2026-04-21 14:52:37 (UTC+8) |
| 出版者: | EDP Sciences |
| 摘要: | 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 sub()r -17.27+ or - 0.07, and a ([Delta]m sub(15)) sub()r 0.69 + or - 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 ~0.2M sub([middot in circle]) of material containing ~0.07 M sub([middot in circle]) of super(56) Ni. 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 [<, ~]0.6M sub([middot in circle]) of material was ejected, implying that the white dwarf is not completely disrupted, and that a bound remnant is a likely outcome.
出版者： EDP Sciences
出版日期： 2016-05-01
出處： Astronomy and astrophysics (Berlin), 2016-05, Vol.589, p.A89
資源來源： EDP Sciences
版權： CC0 1.0 - Universal
識別號： ISSN: 0004-6361
識別號： ISSN: 1432-0746
識別號： EISSN: 1432-0746
識別號： DOI: 10.1051/0004-6361/201528036 |
| 顯示於類別: | [天文研究所] 期刊論文
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