Evidence for a Chandrasekhar-mass explosion in the Ca-strong 1991bg-like type la supernova 2016hnk
Galbany, L.1,2; Ashall, C.3; Hoflich, P.3; Gonzalez-Gaitan, S.4; Taubenberger, S.5,6; Stritzinger, M.7; Hsiao, E. Y.3; Mazzali, P.6,8; Baron, E.9; Blondin, S.10,11
刊名ASTRONOMY & ASTROPHYSICS
2019-09-23
卷号630页码:32
关键词supernovae: general supernovae: individual: SN 2016hnk
ISSN号1432-0746
DOI10.1051/0004-6361/201935537
产权排序第46完成单位
文献子类Article
英文摘要

Aims. We present a comprehensive dataset of optical and near-infrared photometry and spectroscopy of type Ia supernova (SN) 2016hnk, combined with integral field spectroscopy (IFS) of its host galaxy, MCG -01-06-070, and nearby environment. Our goal with this complete dataset is to understand the nature of this peculiar object. Methods. Properties of the SN local environment are characterized by means of single stellar population synthesis applied to IFS observations taken two years after the SN exploded. We performed detailed analyses of SN photometric data by studying its peculiar light and color curves. SN 2016hnk spectra were compared to other 1991bg-like SNe Ia, 2002es-like SNe Ia, and Ca-rich transients. In addition, we used abundance stratification modeling to identify the various spectral features in the early phase spectral sequence and also compared the dataset to a modified non-LTE model previously produced for the sublumnious SN 1999by. Results. SN 2016hnk is consistent with being a subluminous (M-B = -16.7 mag, S-BV =0.43 +/- 0.03), highly reddened object. The IFS of its host galaxy reveals both a significant amount of dust at the SN location, residual star formation, and a high proportion of old stellar populations in the local environment compared to other locations in the galaxy, which favors an old progenitor for SN 2016hnk. Inspection of a nebular spectrum obtained one year after maximum contains two narrow emission lines attributed to the forbidden [Ca II] lambda lambda 7291,7324 doublet with a Doppler shift of 700 km s(-1). Based on various observational diagnostics, we argue that the progenitor of SN 2016hnk was likely a near Chandrasekhar-mass (M-Ch) carbon-oxygen white dwarf that produced 0.108 M-circle dot of Ni-56. Our modeling suggests that the narrow [Ca II] features observed in the nebular spectrum are associated with Ca-48 from electron capture during the explosion, which is expected to occur only in white dwarfs that explode near or at the M-Ch limit.

学科主题天文学 ; 恒星与银河系 ; 恒星天文学
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出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
资助项目National Science Foundation[AST-1613472] ; National Science Foundation (NSF)[1715133] ; FCT[CRISP PTDC/FIS-AST-31546] ; VILLUM FONDEN[13261] ; Independent Research Fund Denmark ; National Aeronautics & Space Administration (NASA)[NNX16AB25G] ; National Aeronautics & Space Administration (NASA)[NN12AR55G] ; National Aeronautics & Space Administration (NASA)[80NSSC18K0284] ; National Aeronautics & Space Administration (NASA)[80NSSC18K1575] ; Aarhus University Research Fund (AUFF) ; China postdoctoral science foundation[2018T110006] ; Swedish Research Council (Vetenskapsradet) ; Swedish National Space Board ; research environment grant "Gravitational Radiation and Electromagnetic Astrophysical Transients (GREAT)" ; EU/FP7-ERC[615929] ; Finnish Cultural Foundation ; NSF[AST-1313484] ; NSF[AST-1615455] ; NSF[AST-1821987] ; NSF[1821967] ; NSF[AST-1515927] ; NSF[AST-0908816] ; US NSF[AST-1211916] ; TABASGO Foundation ; STFC[ST/M005348/1] ; H2020 through an ERC Starting Grant[758638] ; National Natural Science Foundation of China (NSFC)[11325313] ; National Natural Science Foundation of China (NSFC)[11633002] ; National Natural Science Foundation of China (NSFC)[11773067] ; National Natural Science Foundation of China (NSFC)[11403096] ; Youth Innovation Promotion Association of the CAS[2018081] ; Western Light Youth Project of CAS ; LCO network[CLN2016A-005] ; LCO network[NAOC2017AB-001] ; LCO network[CON2016A-008] ; LCO network[ARI2017AB-001] ; Gordon and Betty Moore Foundation[GBMF5490] ; Mt. Cuba Astronomical Foundation ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Chinese Academy of Sciences South America Center for Astronomy (CASSACA) ; Villum Foundation ; Las Cumbres Observatory (LCO) ; Instrument Center for Danish Astrophysics (IDA) ; "the Strategic Priority Research Program-The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[11 XDB09000000] ; Special Fund for Astronomy from the Ministry of Finance ; National Astronomical Observatories of China ; Chinese Academy of Sciences (CAS) ; People's Government of Yunnan Province ; Gemini Observatory[GS-2016B-Q-22]
WOS关键词POTSDAM MULTIAPERTURE SPECTROPHOTOMETER ; ACCRETING WHITE-DWARFS ; NEAR-INFRARED SPECTRA ; DIGITAL SKY SURVEY ; IA SUPERNOVA ; LIGHT CURVES ; ABUNDANCE STRATIFICATION ; SUB-CHANDRASEKHAR ; PROGENITOR SYSTEM ; URCA PROCESS
WOS研究方向Astronomy & Astrophysics
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:000487185300001
资助机构National Science Foundation[AST-1613472] ; National Science Foundation (NSF)[1715133] ; FCT[CRISP PTDC/FIS-AST-31546] ; VILLUM FONDEN[13261] ; Independent Research Fund Denmark ; National Aeronautics & Space Administration (NASA)[NNX16AB25G, NN12AR55G, 80NSSC18K0284, 80NSSC18K1575] ; Aarhus University Research Fund (AUFF) ; China postdoctoral science foundation[2018T110006] ; Swedish Research Council (Vetenskapsradet) ; Swedish National Space Board ; research environment grant "Gravitational Radiation and Electromagnetic Astrophysical Transients (GREAT)" ; EU/FP7-ERC[615929] ; Finnish Cultural Foundation ; NSF[AST-1313484, AST-1615455, AST-1821987, 1821967, AST-1515927, AST-0908816] ; US NSF[AST-1211916] ; TABASGO Foundation ; STFC[ST/M005348/1] ; H2020 through an ERC Starting Grant[758638] ; National Natural Science Foundation of China (NSFC)[11325313, 11633002, 11773067, 11403096] ; Youth Innovation Promotion Association of the CAS[2018081] ; Western Light Youth Project of CAS ; LCO network[CLN2016A-005, NAOC2017AB-001, CON2016A-008, ARI2017AB-001] ; Gordon and Betty Moore Foundation[GBMF5490] ; Mt. Cuba Astronomical Foundation ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Chinese Academy of Sciences South America Center for Astronomy (CASSACA) ; Villum Foundation ; Las Cumbres Observatory (LCO) ; Instrument Center for Danish Astrophysics (IDA) ; "the Strategic Priority Research Program-The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[11 XDB09000000] ; Special Fund for Astronomy from the Ministry of Finance ; National Astronomical Observatories of China ; Chinese Academy of Sciences (CAS) ; People's Government of Yunnan Province ; Gemini Observatory[GS-2016B-Q-22]
内容类型期刊论文
源URL[http://ir.ynao.ac.cn/handle/114a53/21245]  
专题云南天文台_丽江天文观测站(南方基地)
云南天文台_中国科学院天体结构与演化重点实验室
通讯作者Galbany, L.
作者单位1.PITT PACC, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA
2.Departamento de Física Teórica y del Cosmos, Universidad de Granada, 18071 Granada, Spain
3.Department of Physics, Florida State University, Tallahassee, FL 32306, USA
4.CENTRA/COSTAR, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
5.European Southern Observatory, Karl-Schwarzschild-Straeß2, 85748 Garching bei München, Germany
6.Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Straße 1, 85748 Garching bei München, Germany
7.Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark
8.Astrophysics Research Institute, Liverpool John Moores University, IC2, Liverpool Science Park, 146 Brownlow Hill, Liverpool L3 5RF, UK
9.Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, USA
10.Aix Marseille Univ., CNRS, CNES, Laboratoire d’Astrophysique de Marseille (LAM), Marseille, France
推荐引用方式
GB/T 7714
Galbany, L.,Ashall, C.,Hoflich, P.,et al. Evidence for a Chandrasekhar-mass explosion in the Ca-strong 1991bg-like type la supernova 2016hnk[J]. ASTRONOMY & ASTROPHYSICS,2019,630:32.
APA Galbany, L..,Ashall, C..,Hoflich, P..,Gonzalez-Gaitan, S..,Taubenberger, S..,...&Zhang JJ.(2019).Evidence for a Chandrasekhar-mass explosion in the Ca-strong 1991bg-like type la supernova 2016hnk.ASTRONOMY & ASTROPHYSICS,630,32.
MLA Galbany, L.,et al."Evidence for a Chandrasekhar-mass explosion in the Ca-strong 1991bg-like type la supernova 2016hnk".ASTRONOMY & ASTROPHYSICS 630(2019):32.
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