论文标题
发光的IIN Supernova SN 2017HCC：红外明亮，X射线和无线电微弱
The luminous Type IIN supernova SN 2017hcc: Infrared bright, X-ray and radio faint
论文作者
论文摘要
我们介绍了X射线频段中的Chandra X射线望远镜的超新星（SN）2017HCC的多波长观察结果以及X射线频带的X射线望远镜Swift（Swift-XRT），Spitzer和TriplesPec Spectrometer and TriplesPec Spectrometer在近红外（IR）和Mid-ir bands and Mid-ir Bands和Mid-Mid-ir Bands and the Karl G. Jansky for jansky（vla for jansky）（vla）（vla for jansky）（vla for jansky and for jansky and for jansky and）。 X射线观测结果涵盖了29至1310天，在第727天与Chandra进行了第一次X射线检测。从第1000天开始，随后在VLA无线电带中检测到SN。虽然无线电数据稀疏，但同步加速器自动吸收显然被排除为无线电吸收机制。近IIR观察结果表明，较晚的IR发射主导光谱能分布。 \ snhcc \的早期属性与冲击突破到密集的质量损失区域一致，$ \ dot m \ sim 0.1 m_ \ odot \ rm yr yr^{ - 1} $十年。在几次100天的时间里，质量损失率下降到$ \ sim 0.02 m_ \ odot \ rm yr^{ - 1} $，如主导的IR亮度确定。此外，无线电数据还使我们能够在第1000天左右计算质量损失率，这比降压峰附近的质量减少率估计值小两个数量级。这些值表明SN祖先在爆炸前十年进行了增强的质量损失事件。 IR与X射线光度的高比率不可能在简单的模型中，并且是不对称室内区域的可能证据。
We present multiwavelength observations of supernova (SN) 2017hcc with the Chandra X-ray telescope and the X-ray telescope onboard Swift (Swift-XRT) in X-ray bands, with the Spitzer and the TripleSpec spectrometer in near-infrared (IR) and mid-IR bands and with the Karl G. Jansky Very Large Array (VLA) for radio bands. The X-ray observations cover a period of 29 to 1310 days, with the first X-ray detection on day 727 with the Chandra. The SN was subsequently detected in the VLA radio bands from day 1000 onwards. While the radio data are sparse, synchrotron-self absorption is clearly ruled out as the radio absorption mechanism. The near- and the mid-IR observations showed that late time IR emission dominates the spectral energy distribution. The early properties of \snhcc\ are consistent with shock breakout into a dense mass-loss region, with $\dot M \sim 0.1 M_\odot \rm yr^{-1}$ for a decade. At few 100 days, the mass-loss rate declined to $\sim 0.02 M_\odot \rm yr^{-1}$, as determined from the dominant IR luminosity. In addition, radio data also allowed us to calculate a mass-loss rate at around day 1000, which is two orders of magnitude smaller than the mass-loss rate estimates around the bolometric peak. These values indicate that the SN progenitor underwent an enhanced mass-loss event a decade before the explosion. The high ratio of IR to X-ray luminosity is not expected in simple models and is possible evidence for an asymmetric circumstellar region.
