论文标题
长寿的长寿：相互作用的瞬态SN 2017HCC
A long life of excess: The interacting transient SN 2017hcc
论文作者
论文摘要
在这项研究中，我们介绍了长期寿命的IIN Supernova SN 2017HCC的五年后续活动的结果，该活动在螺旋矮人的近极金属性宿主中发现。漫长的上升时间（57 $ \ pm $ 2天，Atlas $ o $ band）和高光度（在Atlas $ o $ band中达到$ -20.78 $ \ pm $ 0.01 mag）指向大规模弹射器与巨大和浓密的杂物（CSM）的相互作用。 SN 2017HCC的演变在光谱和光度法上都很慢，让人联想到长期寿命IIN，SN 2010JL。高峰后不久，红外（IR）过量就显而易见了，在Balmer线上从几百天开始，蓝光很明显，但似乎逐渐消失+1200天。我们认为，先前存在的灰尘的红外光在早期占主导地位，在时期> $ \ sim $+800天的新粉尘谷物可能会凝结。
In this study we present the results of a five-year follow-up campaign of the long-lived type IIn supernova SN 2017hcc, found in a spiral dwarf host of near-solar metallicity. The long rise time (57 $\pm$ 2 days, ATLAS $o$ band) and high luminosity (peaking at $-$20.78 $\pm$ 0.01 mag in the ATLAS $o$ band) point towards an interaction of massive ejecta with massive and dense circumstellar material (CSM). The evolution of SN 2017hcc is slow, both spectroscopically and photometrically, reminiscent of the long-lived type IIn, SN 2010jl. An infrared (IR) excess was apparent soon after the peak, and blueshifts were noticeable in the Balmer lines starting from a few hundred days, but appeared to be fading by around +1200 days. We posit that an IR light echo from pre-existing dust dominates at early times, with some possible condensation of new dust grains occurring at epochs >$\sim$+800 days.
