arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.07650astro-ph.SRastro-ph.HEastro-ph.IM
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与SN 2005 cs非常相似的低光度核心坍缩超新星

A low-luminosity core-collapse supernova very similar to SN 2005cs

Zoltán Jäger, József Vinkó, Barna I. Bíró, Tibor Hegedüs, Tamás Borkovits, Zoltán Jäger, Andrea P. Nagy, László Molnár, Levente Kriskovics

摘要:

我们对低光度II-P型超新星(LL SN IIP)PSN J17292918+7542390进行了观测和分析。观察到的此类事件的样本仍然很少,其性质仍在辩论中。这类超新星与SN 2005 cs类似,SN 2005 cs是一个观测良好的低光度II-P型事件,具有低膨胀速度,喷出的$^{56}$ Ni质量很小。我们已经开发了一个强大的和相对快速的蒙特卡罗代码,适合半解析模型的核心坍缩超新星的光变曲线。这使得最重要的物理参数的估计,如祖星的半径,弹出的包层的质量,在爆炸过程中合成的放射性镍的质量,等等。PSN J17292918+7542390的原始半径、喷出物质量、动能和膨胀速度分别为$R_0 = 91_{-70}^{+119} \cdot 10^{11} \;\text{cm}$、$M_\text{ej} = 9.89_{-1.00}^{+2.10} \; M_{\odot}$、$E_{\mathrm{kin}} = 0.65_{-0.18}^{+0.19} \;\text{foe}$、$v_{\mathrm{exp}} = 3332_{-347}^{+216}$ km s $^{-1}$。PSN J17292918+7542390的初始镍质量为$1.55_{-0.70}^{+0.75} \cdot 10^{-3} M_{\odot}$。在最早观测阶段测得的光球速度为7000 km/s $^{-1}$。就我们所知,基于观测到的低光度II-P型超新星的小种群,确定的值是这些事件的典型值。

英文摘要:

We present observations and analysis of PSN J17292918+7542390, a low-luminosity Type II-P supernova (LL SN IIP). The observed sample of such events is still low, and their nature is still under debate. Such supernovae are similar to SN 2005cs, a well-observed low-luminosity Type II-P event, having low expansion velocities, and small ejected $^{56}$Ni mass. We have developed a robust and relatively fast Monte-Carlo code that fits semi-analytic models to light curves of core collapse supernovae. This allows the estimation of the most important physical parameters, like the radius of the progenitor star, the mass of the ejected envelope, the mass of the radioactive nickel synthesized during the explosion, among others. PSN J17292918+7542390 has $R_0 = 91_{-70}^{+119} \cdot 10^{11} \;\text{cm}$, $M_\text{ej} = 9.89_{-1.00}^{+2.10} \; M_{\odot}$, $E_{\mathrm{kin}} = 0.65_{-0.18}^{+0.19} \;\text{foe}$, $v_{\mathrm{exp}} = 3332_{-347}^{+216}$ km s$^{-1}$, for its progenitor radius, ejecta mass, kinetic energy and expansion velocity, respectively. The initial nickel mass of the PSN J17292918+7542390 turned out to be $1.55_{-0.70}^{+0.75} \cdot 10^{-3} M_{\odot}$. The measured photospheric velocity at the earliest observed phase is 7000 km s$^{-1}$. As far as we can tell based on the small population of observed low-luminosity Type II-P supernovae, the determined values are typical for these events.

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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