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arXiv 2409.04650astro-ph.CO
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ZTF Ia型超新星DR2:模拟与体积限定样本

ZTF SN Ia DR2: Simulations and volume limited sample

M. Amenouche, M. Smith, P. Rosnet, M. Rigault, M. Aubert, C. Barjou-Delayre, U. Burgaz, B. Carreres, G. Dimitriadis, F. Feinstein, L. Galbany, M. Ginolin, A. Go… 展开作者

M. Amenouche, M. Smith, P. Rosnet, M. Rigault, M. Aubert, C. Barjou-Delayre, U. Burgaz, B. Carreres, G. Dimitriadis, F. Feinstein, L. Galbany, M. Ginolin, A. Goobar, L. Harvey, Y. -L. Kim, K. Maguire, T. E. Müller-Bravo, J. Nordin, P. Nugent, B. Racine, D. Rosselli, N. Regnault, J. Sollerman, J. H. Terwel, A. Townsend, S. L. Groom, S. R. Kulkarni, M. Kasliwal, R. R. Laher, J. Purdum

AI总结:

本文利用skysurvey框架真实模拟ZTF SN Ia DR2,并基于SALT2参数红移依赖构建约1000颗、z_lim≤0.06的无偏体积限定样本。

摘要:

Ia型超新星(SNe Ia)是通过拟合Hubble-Lemaître图(即SN Ia距离模数随其红移的变化)来推导宇宙学参数的历史性探针。在精确宇宙学时代,对任何进入Hubble-Lemaître图的巡天进行真实的SNe Ia模拟,是解决Malmquist偏差等观测系统误差的关键工具。由于SNe Ia的距离模数由其光变曲线拟合得到,因此需要一个稳健的模拟框架。本文中,我们展示了模拟框架skysurvey在再现Zwicky Transient Facility(ZTF)SN Ia DR2方面的性能,该数据发布涵盖ZTF第一阶段,即2018年4月至2020年12月的运行。ZTF SN Ia DR2样本对应近3000颗具有宇宙学质量的已分类SNe Ia。首先,在对观测条件和仪器性能进行若干精细调整后,开展了针对ZTF SN Ia DR2的定向模拟,以检验该框架的有效性。随后,利用ZTF观测日志和ZTF SN Ia DR2选择标准对模拟光变曲线进行了真实模拟,以证明该模拟框架能够匹配ZTF SN Ia DR2样本。此外,还对SALT2光变曲线参数(拉伸和颜色)的红移依赖性进行了研究,以推导一个体积限定样本,即无偏SNe Ia样本,其特征为z_lim ≤ 0.06。这个包含约1000颗SNe Ia的体积限定样本是独一无二的,可用于以前所未有的精度对标准化程序开展新分析(这些分析见相关配套论文)。

英文摘要:

Type Ia supernovae (SNe Ia) constitute an historical probe to derive cosmological parameters through the fit of the Hubble-Lemaître diagram, i.e. SN Ia distance modulus versus their redshift. In the era of precision cosmology, realistic simulation of SNe Ia for any survey entering in an Hubble-Lemaître diagram is a key tool to address observational systematics, like Malmquist bias. As the distance modulus of SNe Ia is derived from the fit of their light-curves, a robust simulation framework is required. In this paper, we present the performances of the simulation framework skysurvey to reproduce the the Zwicky Transient Facility (ZTF) SN Ia DR2 covering the first phase of ZTF running from April 2018 up to December 2020. The ZTF SN Ia DR2 sample correspond to almost 3000 classified SNe Ia of cosmological quality. First, a targeted simulation of the ZTF SN Ia DR2 was carried on to check the validity of the framework after some fine tuning of the observing conditions and instrument performance. Then, a realistic simulation has been run using observing ZTF logs and ZTF SN Ia DR2 selection criteria on simulated light-curves to demonstrate the ability of the simulation framework to match the ZTF SN Ia DR2 sample. Furthermore a redshift dependency of SALT2 light-curve parameters (stretch and colour) was conducted to deduce a volume limited sample, i.e. an unbiased SNe Ia sample, characterized with $z_{lim} \leq 0.06$. This volume limited sample of about 1000 SNe Ia is unique to carry on new analysis on standardization procedure with a precision never reached (those analysis are presented in companion papers).

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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