Late-time Flattening of Type Ia Supernova Light Curves: Constraints from SN 2014J in M82
文献类型：期刊论文
| 作者 | Yang, Yi; Wang, Lifan; Baade, Dietrich; Brown, Peter. J.; Cikota, Aleksandar; Cracraft, Misty; Hoflich, Peter A.; Maund, Justyn R.; Patat, Ferdinando; Sparks, William B. |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018 |
| 卷号 | 852期号:2页码:89 |
| 英文摘要 | The very nearby Type Ia supernova 2014J in M82 offers a rare opportunity to study the physics of thermonuclear supernovae at extremely late phases (greater than or similar to 800 days). Using the Hubble Space Telescope, we obtained 6 epochs of high-precision photometry for SN 2014J from 277 days to 1181 days past the B-band maximum light. The reprocessing of electrons and X-rays emitted by the radioactive decay chain Co-57 -> Fe-57 is needed to explain the significant flattening of both the F606W-band and the pseudo-bolometric light curves. The flattening confirms previous predictions that the late-time evolution of type Ia supernova luminosities requires additional energy input from the decay of Co-57. By assuming the F606W-band luminosity scales with the bolometric luminosity at similar to 500 days after the B-band maximum light, a mass ratio Ni-57/Ni-56 similar to 0.065(-0.005)(+0.004) is required. This mass ratio is roughly similar to 3 times the solar ratio and favors a progenitor white dwarf with a mass near the Chandrasekhar limit. A similar fit using the constructed pseudo-bolometric luminosity gives a mass ratio Ni-57/Ni-56 similar to 0.066(-0.009)(+0.008) . Astrometric tests based on the multi-epoch HST ACS/WFC images reveal no significant circumstellar light echoes in between 0.3 and 100 pc from the supernova. |
| 语种 | 英语 |
| WOS记录号 | WOS:000419798700006 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/18022]  |
| 专题 | 中国科学院紫金山天文台 |
| 推荐引用方式 GB/T 7714 | Yang, Yi,Wang, Lifan,Baade, Dietrich,et al. Late-time Flattening of Type Ia Supernova Light Curves: Constraints from SN 2014J in M82[J]. ASTROPHYSICAL JOURNAL,2018,852(2):89. |
| APA | Yang, Yi.,Wang, Lifan.,Baade, Dietrich.,Brown, Peter. J..,Cikota, Aleksandar.,...&Wheeler, J. Craig.(2018).Late-time Flattening of Type Ia Supernova Light Curves: Constraints from SN 2014J in M82.ASTROPHYSICAL JOURNAL,852(2),89. |
| MLA | Yang, Yi,et al."Late-time Flattening of Type Ia Supernova Light Curves: Constraints from SN 2014J in M82".ASTROPHYSICAL JOURNAL 852.2(2018):89. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。