Photometric and spectroscopic observations, and abundance tomography modelling of the type Ia supernova SN 2014J located in M82
Photometric and spectroscopic observations, and abundance tomography modelling of the type Ia supernova SN 2014J located in M82
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DOI：
10.1093/mnras/stu1995
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发表时间：
2014-09
影响因子：
4.8
通讯作者：
C. Ashall;P. Mazzali;D. Bersier;S. Hachinger;M. Phillips;S. Percival;Phil A. James;Kate Maguire
中科院分区：
文献类型：
--
作者：
C. Ashall;P. Mazzali;D. Bersier;S. Hachinger;M. Phillips;S. Percival;Phil A. James;Kate Maguire
给出了附近Ia型超新星(SNIa)SN2014J的光谱和光度观测结果。光谱观测是使用多用途积分场单位光谱仪进行的，相对于带宽最大值进行−8~+10 d。观测范围从3900到9000 A.，SN2014J位于M82，这使其成为至少在过去28年中研究的最接近的SNIa。它是一个光谱上正常的具有高速特征的SnIa，用蒙特卡罗辐射传输程序模拟了SN2014J的光谱，使用丰度层析技术。SN 2014J是高度红色的，宿主星系的消光为E(B−V)=1.2(RV=1.38)。经消光校正后，其�M15(B)为1.08±0.03。由于SN 2014j是一个正常的SN Ia，所以选择了经典W7模型的密度结构。模型的光度和光度都与出现在JD245点的B波段最大值6690.4±0.12相一致。SN 2014J的丰度与其他正常的SN Ia相似，在高速(12300公里S−1)下含有大量的硅(质量分数为12%)和硫(质量分数为9%)，而低速喷出物(V<；6500公里S−1)几乎全部由56Ni组成。关键词：辐射转移技术：光谱-超新星：普通-超新星：个体：SN 2014J。
Spectroscopic and photometric observations of the nearby Type Ia Supernova (SN Ia) SN 2014J are presented. Spectroscopic observations were taken −8 to +10 d relative to Bband maximum, using FRODOSpec, a multipurpose integral-field unit spectrograph. The observations range from 3900 to 9000 A. SN 2014J is located in M82 which makes it the closest SN Ia studied in at least the last 28 yr. It is a spectroscopically normal SN Ia with high-velocity features.Wemodel the spectra of SN 2014J with a Monte Carlo radiative transfer code, using the abundance tomography technique. SN 2014J is highly reddened, with a host galaxy extinction of E(B − V) = 1.2 (RV = 1.38). It has a �m15(B) of 1.08 ± 0.03 when corrected for extinction. As SN 2014J is a normal SN Ia, the density structure of the classical W7 model was selected. The model and photometric luminosities are both consistent with B-band maximum occurring on JD 245 6690.4 ± 0.12. The abundance of the SN 2014J behaves like other normal SN Ia, with significant amounts of silicon (12 per cent by mass)and sulphur (9 per cent by mass) at high velocities (12 300 km s−1) and the low-velocity ejecta (v < 6500 km s−1) consists almost entirely of 56Ni. Key words: radiative transfer – techniques: spectroscopic – supernovae: general – supernovae: individual: SN 2014J.