The Circumstellar Environments of Double-peaked, Calcium-strong Transients 2021gno and 2021inl

Author:

Jacobson-Galán W. V.ORCID,Venkatraman P.ORCID,Margutti R.ORCID,Khatami D.ORCID,Terreran G.ORCID,Foley R. J.ORCID,Angulo R.,Angus C. R.ORCID,Auchettl K.ORCID,Blanchard P. K.ORCID,Bobrick A.ORCID,Bright J. S.ORCID,Brout D.ORCID,Chambers K. C.ORCID,Couch C. D.,Coulter D. A.ORCID,Clever K.,Davis K. W.,de Boer T. J. L.ORCID,DeMarchi L.ORCID,Dodd S. A.ORCID,Jones D. O.ORCID,Johnson J.,Kilpatrick C. D.ORCID,Khetan N.ORCID,Lai Z.,Langeroodi D.ORCID,Lin C.-C.ORCID,Magnier E. A.ORCID,Milisavljevic D.ORCID,Perets H. B.ORCID,Pierel J. D. R.ORCID,Raymond J.ORCID,Rest S.ORCID,Rest A.ORCID,Ridden-Harper R.ORCID,Shen K. J.ORCID,Siebert M. R.ORCID,Smith C.,Taggart K.ORCID,Tinyanont S.ORCID,Valdes F.ORCID,Villar V. A.ORCID,Wang Q.ORCID,Yadavalli S. K.ORCID,Zenati Y.ORCID,Zenteno A.ORCID

Abstract

Abstract We present panchromatic observations and modeling of calcium-strong supernovae (SNe) 2021gno in the star-forming host-galaxy NGC 4165 and 2021inl in the outskirts of elliptical galaxy NGC 4923, both monitored through the Young Supernova Experiment transient survey. The light curves of both, SNe show two peaks, the former peak being derived from shock cooling emission (SCE) and/or shock interaction with circumstellar material (CSM). The primary peak in SN 2021gno is coincident with luminous, rapidly decaying X-ray emission (L x = 5 × 1041 erg s−1) detected by Swift-XRT at δ t = 1 day after explosion, this observation being the second-ever detection of X-rays from a calcium-strong transient. We interpret the X-ray emission in the context of shock interaction with CSM that extends to r < 3 × 1014 cm. Based on X-ray modeling, we calculate a CSM mass M CSM = (0.3−1.6) × 10−3 M and density n = (1−4) × 1010 cm−3. Radio nondetections indicate a low-density environment at larger radii (r > 1016 cm) and mass-loss rate of M ̇ < 10 4 M yr−1. SCE modeling of both primary light-curve peaks indicates an extended-progenitor envelope mass M e = 0.02−0.05 M and radius R e = 30−230 R . The explosion properties suggest progenitor systems containing either a low-mass massive star or a white dwarf (WD), the former being unlikely given the lack of local star formation. Furthermore, the environments of both SNe are consistent with low-mass hybrid He/C/O WD + C/O WD mergers.

Publisher

American Astronomical Society

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 20 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3