How accurate are current 56Ni mass estimates in Type Ia Supernovae?

IF 1.9 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

New Astronomy Pub Date : 2025-05-02 DOI:10.1016/j.newast.2025.102411

Jagriti Gaba , Rahul Kumar Thakur , Naresh Sharma , Dinkar Verma , Shashikant Gupta

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Abstract

The diversity of type Ia supernovae (SNe Ia) has become increasingly apparent with the rapid growth in observational data. Understanding the explosion mechanism of SNe Ia is crucial for their cosmological calibration and for advancing our knowledge of stellar physics. The estimation of ⁵⁶Ni mass produced in these events is key to elucidating their explosion mechanism. This study compares two methods of ⁵⁶Ni mass estimation. We first examine the relationship between peak luminosity and the second maximum in near-infrared (NIR) bands using observations of 18 nearby SNe Ia. Based on this relationship, we estimate the Ni mass for a set of nine well-observed SNe Ia using the Arnett rule. Additionally, we estimate the ⁵⁶Ni mass using bolometric light curves of these SNe through energy conservation arguments. A comparison of these two estimation methods using Student’s t-test reveals no statistically significant differences between the estimates. This finding suggests that both methods provide robust estimates of Ni mass in SNe Ia.

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目前对Ia型超新星的56Ni质量估计有多准确？

随着观测数据的快速增长，Ia型超新星（SNe Ia）的多样性日益明显。了解Ia型超新星的爆炸机制对它们的宇宙学校准和提高我们对恒星物理的认识至关重要。在这些事件中产生的56Ni量的估计是阐明其爆炸机理的关键。本研究比较了两种估算56Ni质量的方法。我们首先利用近18颗Ia型超新星的观测资料，研究了近红外波段峰值光度与第二最大值之间的关系。基于这种关系，我们使用Arnett规则估计了一组9个观测良好的Ia型超新星的Ni质量。此外，我们通过能量守恒的论点，利用这些SNe的热光度曲线估计了56Ni的质量。使用学生t检验对这两种估计方法进行比较，发现估计之间没有统计学上的显著差异。这一发现表明，这两种方法都提供了对Ia期超新星Ni质量的可靠估计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

New Astronomy 地学天文-天文与天体物理

CiteScore

4.00

自引率

10.00%

发文量

109

审稿时长

13.6 weeks

期刊介绍： New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation. New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.