论文标题

巨大的星星独自一人死亡:SN 2010JP的偏远环境及其相关的晚期来源

Massive stars dying alone: the remote environment of SN 2010jp and its associated late-time source

论文作者

Corgan, Austin, Smith, Nathan, Andrews, Jennifer E., Filippenko, Alexei V., Van Dyk, Schuyler

论文摘要

我们介绍了特殊的喷气驱动型Supernova SN2010JP的延迟图像,包括在类似时间内拍摄2 - 5年爆炸后拍摄的HST图像和深地面图像。这些用于表征其异常偏远的环境,并限制祖先的初始质量和年龄。发现SN2010JP的位置沿着漫射的星光链驻留,该星星可能是相互作用的银河系对NGC2207/IC2163的外部螺旋臂或潮汐尾部。有一个明亮的HII区域投影在1 kpc之内,并且在SN2010JP位置的连续源周围立即有微弱的扩展HALPHA发射,该位置具有$ M_ {F555W} = -7.7(\ pm 0.2)$。原则上,挥之不去的光可能来自迟发时间的偶然材料(CSM)相互作用,一种进化的超级巨人,宿主星群或这些组合的某种组合。稳定的通量超过3年,缺乏强大的空间未解决的HALPHA发射使持续的CSM相互作用不太可能。如果一个进化的超级巨人占主导地位,则其观察到的光度意味着最初的质量约为22 $ m _ {\ odot} $,一个比大约8 Myr大的年龄。如果源是星团,则其颜色和绝对幅度意味着年龄为8-13 MYR和适度的群集初始质量($ m/m _ {\ odot} $)= 3.6-3.8。扩展的Halpha发射到半径为30 PC的半径显示出一个微弱的HII区域,指向最近至少有一个晚期O型星的恒星形成。基于这些各种线索,我们得出结论,SN2010JP的祖细胞的初始质量可能为18-22 $ M _ {\ odot} $。

We present late-time images of the site of the peculiar jet-driven TypeIIn supernova SN2010jp, including HST images taken 2-5 yr post explosion and deep ground-based images over a similar time. These are used to characterise its unusually remote environment and to constrain the progenitor's initial mass and age. The position of SN2010jp is found to reside along a chain of diffuse starlight that is probably an outer spiral arm or tidal tail of the interacting galaxy pair NGC2207/IC2163. There is one bright HII region projected within 1 kpc, and there is faint extended Halpha emission immediately surrounding the continuum source at the position of SN2010jp, which has $M_{F555W} = -7.7 (\pm 0.2)$ mag. In principle, the lingering light could arise from late-time circumstellar material (CSM) interaction, an evolved supergiant, a host star cluster, or some combination of these. Steady flux over 3 yr and a lack of strong, spatially unresolved Halpha emission make ongoing CSM interaction unlikely. If an evolved supergiant dominates, its observed luminosity implies an initial mass of roughly 22 $M_{\odot}$ and an age older than roughly 8 Myr. If the source is a star cluster, then its colour and absolute magnitude imply an age of 8-13 Myr and a modest cluster initial mass of log($M/M_{\odot}$) = 3.6-3.8. Extended Halpha emission out to a radius of 30 pc reveals a faint evolved HII region, pointing to recent star formation with at least one late O-type star. Based on these various clues, we conclude that the progenitor of SN2010jp had a likely initial mass of 18-22 $M_{\odot}$.

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