论文标题
超浮肿超新星2019NEQ的比较光谱分析
Comparative Spectral Analysis of the Superluminous Supernova 2019neq
论文作者
论文摘要
我们介绍了最近发现的快速发展的I型超浮肿超新星（SLSN-I），SN 2019NEQ（在RedShift Z = 0.1059）的详细光谱分析，将其与研究良好的慢速发展的SLSN-I，SN 2010KD（Z = 0.101）进行了比较。我们的研究集中于光谱阶段中采用的光谱。 SN 2019NEQ的观察结果是在麦当劳天文台的10m Hobby-eby-eberly望远镜（HET）低分辨率光谱2（LRS2）进行的。我们将SYN ++代码应用于-4天， +5天和+29天的光谱。我们通过鉴定其光谱中的元素和电离状态来检查SLSN的化学演化和射流组成。我们的分析证实SN 2019NEQ是一个快速发展的SLSN-I。我们在这三个观测值的时期中得出了每个电离状态的数量密度。最后，我们给出了射流质量下限的约束，并找到了一个暗示，以提示演化时间尺度与SLSNE-I弹出质量之间的关系。
We present a detailed spectroscopic analysis of the recently discovered fast evolving Type I superluminous supernova (SLSN-I), SN 2019neq (at redshift z = 0.1059) comparing it to the well-studied slow evolving SLSN-I, SN 2010kd (z = 0.101). Our investigation concentrates on optical spectra taken during the photospheric phase. The observations of SN 2019neq were carried out with the 10m Hobby-Eberly Telescope (HET) Low Resolution Spectrograph-2 (LRS2) at McDonald Observatory. We apply the SYN++ code to model the spectra taken at -4 days, +5 days and +29 days from maximum light. We examine the chemical evolution and ejecta composition of the SLSN by identifying the elements and ionization states in its spectra. Our analysis confirms that SN 2019neq is a fast evolving SLSN-I. We derive the number density of each ionization state at the epoch of the three observations. Finally, we give constraints on the lower limit of the ejecta mass and find a hint for a possible relation between the evolution timescale and the ejected mass of SLSNe-I.
