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arXiv 2311.03473astro-ph.HEastro-ph.COastro-ph.SR
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Ia型超新星的前身星性质及其宿主星系

Type Ia Supernova Progenitor Properties and Their Host Galaxies

Sudeshna Chakraborty, Benjamin Sadler, Peter Hoeflich, Eric Hsiao, M. M. Phillips, C. R. Burns, T. Diamond, I. Dominguez, L. Galbany, S. A. Uddin, C. Ashall, K.… 展开作者

Sudeshna Chakraborty, Benjamin Sadler, Peter Hoeflich, Eric Hsiao, M. M. Phillips, C. R. Burns, T. Diamond, I. Dominguez, L. Galbany, S. A. Uddin, C. Ashall, K. Krisciunas, S. Kumar, T. B. Mera, N. Morrell, E. Baron, M. C. Contreras, M. D. Stritzinger, N. N. Suntzeff

AI总结:

本文提出一种基于延迟爆轰场景的本征函数方法分析Ia型超星光变曲线,揭示了前身星质量与宿主星系演化的关联,并强调长时段光变曲线对宇宙学研究的重要性。

摘要:

我们提出了一种本征函数方法,用于分析由Carnegie Supernova Project获取的161条Ia型超新星(SNe Ia)视觉光变曲线(LCs),以表征其多样性与宿主星系相关性。这些本征函数基于延迟爆轰场景,使用三个参数:由控制56Ni产生的爆燃燃烧量决定的光变曲线延展性,前身星白矮星的主序质量M_MS(控制爆炸能量),以及其中心密度rho_c(改变56Ni分布)。我们的分析工具(SPAT)从观测中提取参数,并利用其允许范围M_MS < 8 M_sun、rho_c < 7-8x10^9 g/cc将它们投影到物理空间中。对于约92%的天体,拟合与单个光变曲线数据点之间的残差约为1-3%。我们发现了两个不同的M_MS群组,分别对应于快速(约40-65 Myrs)和慢速(约200-500 Myrs)的恒星演化。大多数低光度SNe Ia的宿主星系具有低恒星形成率但高M_MS,表明前身星系统的演化时间较慢。91T-like型SNe表现出非常相似的光变曲线和较高的M_MS,并与恒星形成区相关,使其成为早期宇宙(z = 4-11)恒星形成的潜在重要示踪剂。约6%具有“非物理”参数的异常天体可归因于超亮SNe Ia和具有活跃恒星形成宿主星的亚光亮SNe Ia。为了破译SNe Ia的多样性和实现高精度SNe Ia宇宙学,研究证明了覆盖至最大亮度后约60天的光变曲线的重要性。最后,我们在多种爆炸场景的框架下以及即将开展的巡天背景下讨论了我们的方法和结果。

英文摘要:

We present an eigenfunction method to analyze 161 visual light curves (LCs) of Type Ia supernovae (SNe Ia) obtained by the Carnegie Supernova Project to characterize their diversity and host-galaxy correlations. The eigenfunctions are based on the delayed-detonation scenario using three parameters: the LC stretch being determined by the amount of deflagration-burning governing the 56Ni production, the main-sequence mass M_MS of the progenitor white dwarf controlling the explosion energy, and its central density rho_c shifting the 56Ni distribution. Our analysis tool (SPAT) extracts the parameters from observations and projects them into physical space using their allowed ranges M_MS < 8 M_sun, rho_c < 7-8x10^9g/cc. The residuals between fits and individual LC-points are ~ 1-3% for ~ 92% of objects. We find two distinct M_MS groups corresponding to a fast (~ 40-65 Myrs) and a slow(~ 200-500 Myrs) stellar evolution. Most underluminous SNe Ia have hosts with low star formation but high M_MS, suggesting slow evolution times of the progenitor system. 91T-likes SNe show very similar LCs and high M_MS and are correlated to star formation regions, making them potentially important tracers of star formation in the early Universe out to z = 4-11. Some 6% outliers with `non-physical' parameters can be attributed to superluminous SNe Ia and subluminous SNe Ia with hosts of active star formation. For deciphering the SNe Ia diversity and high-precision SNe Ia cosmology, the importance is shown for LCs covering out to ~ 60 days past maximum. Finally, our method and results are discussed within the framework of multiple explosion scenarios, and in light of upcoming surveys.

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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