arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2307.00550astro-ph.SRastro-ph.HE
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IIII-P超新星前身星初始质量与SN 2020jfo:直接探测、光变曲线特性,星云光谱学与局部环境

Type II-P Supernova Progenitor Star Initial Masses and SN 2020jfo: Direct Detection, Light Curve Properties, Nebular Spectroscopy, and Local Environment

Charles D. Kilpatrick, Luca Izzo, Rory O. Bentley, Kenneth C. Chambers, David A. Coulter, Maria R. Drout, Thomas de Boer, Ryan J. Foley, Christa Gall, Melissa R… 展开作者

Charles D. Kilpatrick, Luca Izzo, Rory O. Bentley, Kenneth C. Chambers, David A. Coulter, Maria R. Drout, Thomas de Boer, Ryan J. Foley, Christa Gall, Melissa R. Halford, David O. Jones, Danial Langeroodi, Chien-Cheng Lin, Eugene A. Magnier, Peter McGill, Anna J. G. O'Grady, Yen-Chen Pan, Enrico Ramirez-Ruiz, Armin Rest, Jonathan J. Swift, Samaporn Tinyanont, V. Ashley Villar, Richard J. Wainscoat, Amanda Rose Wasserman, S. Karthik Yadavalli, Grace Yang

AI总结:

本研究利用多波段数据综合分析SN 2020jfo,通过光变曲线、星云光谱及局部环境推断其前身星初始质量约为12-13太阳质量,并指出直接探测质量偏低源于前身星周围物质的消光作用。

摘要:

我们展示了位于14.5 Mpc处的II型超新星(SN II)2020jfo的光学、紫外和红外数据。这些丰富的多波段数据使得我们能够对同一天体比较常用于估计SN II前身星质量的不同方法。利用其早期光变曲线,我们推断SN 2020jfo的前身星半径约为700 $R_{\odot}$,与初始质量为$M_{\rm ZAMS}=$11-13 $M_{\odot}$的红超巨星一致。其晚期光变曲线的衰减最好用0.018$\pm$0.007 $M_{\odot}$的${}^{56}$Ni质量来拟合,这与初始质量约为13 $M_{\odot}$的SN II-P抛射的量一致。早期光谱和测光未表现出与星周物质相互作用的迹象,表明SN 2020jfo在爆炸前最后几年内经历了较弱的质量损失。我们在>$250$天的光谱最好用初始质量为12 $M_{\odot}$的恒星模型来拟合。我们分析了SN 2020jfo附近恒星种群的积分场单元光谱,发现其大质量恒星种群的零龄主序质量为9.7$\substack{+2.5\\\\-1.3} M_{\odot}$。我们在爆炸前成像中识别出单一对应体,并发现其初始质量最多为7.2$\substack{+1.2\\\\-0.6} M_{\odot}$。我们得出结论,该质量与来自SN 2020jfo本身的间接质量指标之间的不一致,极有可能是由前身星周围物质导致的$A_{V}=2$-3 mag的消光引起的,这降低了其观测到的光学光度。由于SN 2020jfo在爆炸后1.6至450天内未表现出此级别的消光或与星周物质相互作用的证据,我们推断这些物质很可能被限制在距前身星约3000 $R_{\odot}$以内。

英文摘要:

We present optical, ultraviolet, and infrared data of the type II supernova (SN II) 2020jfo at 14.5 Mpc. This wealth of multiwavelength data allows to compare different metrics commonly used to estimate progenitor masses of SN II for the same object. Using its early light curve, we infer SN 2020jfo had a progenitor radius of $\approx$700 $R_{\odot}$, consistent with red supergiants of initial mass $M_{\rm ZAMS}=$11-13 $M_{\odot}$. The decline in its late-time light curve is best fit by a ${}^{56}$Ni mass of 0.018$\pm$0.007 $M_{\odot}$ consistent with that ejected from SN II-P with $\approx$13 $M_{\odot}$ initial mass stars. Early spectra and photometry do not exhibit signs of interaction with circumstellar matter, implying that SN 2020jfo experienced weak mass loss within the final years prior to explosion. Our spectra at $>$250 days are best fit by models from 12 $M_{\odot}$ initial mass stars. We analyzed integral field unit spectroscopy of the stellar population near SN 2020jfo, finding its massive star population had a zero age main sequence mass of 9.7$\substack{+2.5\\-1.3} M_{\odot}$. We identify a single counterpart in pre-explosion imaging and find it has an initial mass of at most $7.2\substack{+1.2\\-0.6} M_{\odot}$. We conclude that the inconsistency between this mass and indirect mass indicators from SN 2020jfo itself is most likely caused by extinction with $A_{V}=2$-3 mag due to matter around the progenitor star, which lowered its observed optical luminosity. As SN 2020jfo did not exhibit extinction at this level or evidence for interaction with circumstellar matter between 1.6-450 days from explosion, we conclude that this material was likely confined within $\approx$3000 $R_{\odot}$ from the progenitor star.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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