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arXiv 2409.04346astro-ph.COastro-ph.HE
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ZTF Ia型超新星DR2:综述

ZTF SN Ia DR2: Overview

Mickael Rigault, Mathew Smith, Ariel Goobar, Kate Maguire, Georgios Dimitriadis, Umut Burgaz, Suhail Dhawan, Jesper Sollerman, Nicolas Regnault, Marek Kowalski,… 展开作者

Mickael Rigault, Mathew Smith, Ariel Goobar, Kate Maguire, Georgios Dimitriadis, Umut Burgaz, Suhail Dhawan, Jesper Sollerman, Nicolas Regnault, Marek Kowalski, Melissa Amenouche, Marie Aubert, Chloé Barjou-Delayre, Julian Bautista, Josh S. Bloom, Bastien Carreres, Tracy X. Chen, Yannick Copin, Maxime Deckers, Dominique Fouchez, Christoffer Fremling, Lluis Galbany, Madeleine Ginolin, Matthew Graham, Mancy M. Kasliwal, W. D'Arcy Kenworthy, Young-Lo Kim, Dylan Kuhn, Frank F. Masci, Tomas Müller-Bravo, Adam Miller, Joel Johansson, Jakob Nordin, Peter Nugent, Igor Andreoni, Eric Bellm, Marc Betoule, Mahmoud Osman, Dan Perley, Brodie Popovic, Philippe Rosnet, Damiano Rosselli, Florian Ruppin, Robert Senzel, Ben Rusholme, Tassilo Schweyer, Jacco H. Terwel, Alice Townsend, Andy Tzanidakis, Avery Wold, Josiah Purdum, Yu-Jing Qin, Benjamin Racine, Simeon Reusch, Reed Riddle, Lin Yan

AI总结:

本文介绍ZTF发布的3628颗近邻Ia型超新星DR2数据集及配套光变曲线、光谱和宿主属性,显著扩充低红移样本,并展示约0.15 mag哈勃图弥散。

摘要:

我们发布首个包含数千颗Ia型超新星(SNe Ia)的均一数据集,所有天体均具有光谱分类,其中一半样本具有光谱红移。该发布名为“DR2”,包含3628颗近邻(z < 0.3)Ia型超新星,由Zwicky Transient Facility(兹威基瞬变设施)巡天在2018年3月至2020年12月期间发现、跟踪并分类。其中,3000颗具有良好至极好的采样,2667颗通过标准宇宙学光变曲线质量筛选。因此,该发布是迄今为止最大的Ia型超新星发布,使特征明确的低红移天体数量增加了一个数量级。随“DR2”一起,我们还提供一个近千颗Ia型超新星的体积限定(z < 0.06)样本。借助这一庞大、均一且控制良好的数据集,我们正在研究当前超新星宇宙学中的关键问题,例如Ia型超新星标准化的线性、超新星及其宿主星系依赖关系、Ia型超新星群体的多样性,以及当前光变曲线建模的准确性。这些问题及更多内容在与本次发布相关的一系列论文中得到详细研究。除Ia型超新星参数外,我们还公布强制测光gri波段光变曲线、5138条光谱、局域和全局宿主星系属性、观测日志,以及一个便于使用和访问这些数据的Python工具。“DR2”的测光精度尚不适用于宇宙学参数推断,相关工作将随后以“DR2.5”发布。尽管如此,我们证明包含数千颗Ia型超新星的哈勃图具有典型0.15星等的弥散。

英文摘要:

We present the first homogeneous release of several thousand Type Ia supernovae (SNe Ia), all having spectroscopic classification, and spectroscopic redshifts for half the sample. This release, named the "DR2", contains 3628 nearby (z < 0.3) SNe Ia discovered, followed and classified by the Zwicky Transient Facility survey between March 2018 and December 2020. Of these, 3000 have good-to-excellent sampling and 2667 pass standard cosmology light-curve quality cuts. This release is thus the largest SN Ia release to date, increasing by an order of magnitude the number of well characterized low-redshift objects. With the "DR2", we also provide a volume-limited (z < 0.06) sample of nearly a thousand SNe Ia. With such a large, homogeneous and well controlled dataset, we are studying key current questions on SN cosmology, such as the linearity SNe Ia standardization, the SN and host dependencies, the diversity of the SN Ia population, and the accuracy of the current light-curve modeling. These, and more, are studied in detail in a series of articles associated with this release. Alongside the SN Ia parameters, we publish our force-photometry gri-band light curves, 5138 spectra, local and global host properties, observing logs, and a python tool to ease use and access of these data. The photometric accuracy of the "DR2" is not yet suited for cosmological parameter inference, which will follow as "DR2.5" release. We nonetheless demonstrate that the multi-thousand SN Ia Hubble Diagram has a typical 0.15 mag scatter.

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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