Intermediate-luminosity red transients: Spectrophotometric properties and connection to electron-capture supernova explosions
文献类型：期刊论文
| 作者 | Cai, Y-Z42,43,44,45; Pastorello, A.43; Fraser, M.41; Botticella, M. T.40; Elias-Rosa, N.39,43; Wang, L-Z37,38; Kotak, R.36; Benetti, S.43; Cappellaro, E.43; Turatto, M.43 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2021-10-27 |
| 卷号 | 654页码:30 |
| 关键词 | supernovae: general stars: AGB and post-AGB stars: mass-loss |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202141078 |
| 通讯作者 | Cai, Y-Z(yzcai@mail.tsinghua.edu.cn) |
| 英文摘要 | We present the spectroscopic and photometric study of five intermediate-luminosity red transients (ILRTs), namely AT 2010dn, AT 2012jc, AT 2013la, AT 2013lb, and AT 2018aes. They share common observational properties and belong to a family of objects similar to the prototypical ILRT SN 2008S. These events have a rise time that is less than 15 days and absolute peak magnitudes of between -11.5 and -14.5 mag. Their pseudo-bolometric light curves peak in the range 0.5-9.0 x 10(40) erg s(-1) and their total radiated energies are on the order of (0.3-3) x 10(47) erg. After maximum brightness, the light curves show a monotonic decline or a plateau, resembling those of faint supernovae IIL or IIP, respectively. At late phases, the light curves flatten, roughly following the slope of the Co-56 decay. If the late-time power source is indeed radioactive decay, these transients produce Ni-56 masses on the order of 10(-4) to 10(-3) M-circle dot. The spectral energy distribution of our ILRT sample, extending from the optical to the mid-infrared (MIR) domain, reveals a clear IR excess soon after explosion and non-negligible MIR emission at very late phases. The spectra show prominent H lines in emission with a typical velocity of a few hundred km s(-1), along with Ca II features. In particular, the [Ca II] lambda 7291,7324 doublet is visible at all times, which is a characteristic feature for this family of transients. The identified progenitor of SN 2008S, which is luminous in archival Spitzer MIR images, suggests an intermediate-mass precursor star embedded in a dusty cocoon. We propose the explosion of a super-asymptotic giant branch star forming an electron-capture supernova as a plausible explanation for these events. |
| WOS关键词 | PROJECT II OBSERVATIONS ; CAII INFRARED TRIPLET ; ETA-CARINAE ; LIGHT-CURVE ; SN 2008S ; NGC 300 ; STELLAR MERGERS ; OPTICAL TRANSIENT ; NEARBY GALAXIES ; EVOLUTION |
| 资助项目 | China Postdoctoral Science Foundation[2021M691821] ; National Natural Science Foundation of China (NSFC)[12033003] ; National Natural Science Foundation of China (NSFC)[11633002] ; National Natural Science Foundation of China (NSFC)[11325313] ; National Natural Science Foundation of China (NSFC)[11761141001] ; National Program on Key Research and Development Project[2016YFA0400803] ; NSF[AST-1911225] ; NSF[AST-1813176] ; NSF[AST-2008108] ; NSF[AST-1238877] ; NSFC[11803021] ; Startup Fund for Youngman Research at SJTU ; H2020 ERC grant[758638] ; Royal Society - Science Foundation Ireland University Research Fellowship ; PRIN-INAF 2017 of Toward ; MIUR, PRIN 2017[20179ZF5KS] ; Italian Space Agency (ASI)[2013-016-R.0] ; Spanish Ministry of Science, Innovation and Universities (MICIU)[RYC2019-027683] ; Spanish MICIU project[PID2020-115253GA-I00] ; Jenny and Antti Wihuri foundation ; Vilho, Yrjo and Kalle Vaisala foundation ; ANID BECAS/DOCTORADO NACIONAL[21202412] ; Polish NCN MAESTRO grant[2014/14/A/ST9/00121] ; Villum FONDEN[13261] ; Villum FONDEN[28021] ; Independent Research Fund Denmark[8021-00170B] ; Chinese Academy of Sciences (CAS) ; 2014-2020 ERDF Operational Programme ; Department of Economy, Knowledge, Business and University of the Regional Government of Andalusia[FEDER-UCA18-107404] ; ANID project Basal[AFB-170002] ; Magnus Ehrnrooth Foundation ; Public ESO Spectroscopic Survey for Transient Objects - PESSTO[184.D-1140] ; Public ESO Spectroscopic Survey for Transient Objects - PESSTO[188.D-3003] ; Instrument Centre for Danish Astrophysics (IDA) ; University of Copenhagen ; NOTSA ; UK Science and Technology Facilities Council ; National Aeronautics and Space Administration ; NASA[NN12AR55G] ; NASA[80NSSC18K0284] ; NASA[80NSSC18K1575] ; Kepler/K2 grant[J1944/80NSSC19K0112] ; HST[GO-15889] ; STFC[ST/T000198/1] ; STFC[ST/S006109/1] ; National Aeronautics and Space Administration[NNX08AR22G] ; Xinjiang Astronomical Observatory of the Chinese Academy of Sciences |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000711651100008 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | China Postdoctoral Science Foundation ; National Natural Science Foundation of China (NSFC) ; National Program on Key Research and Development Project ; NSF ; NSFC ; Startup Fund for Youngman Research at SJTU ; H2020 ERC grant ; Royal Society - Science Foundation Ireland University Research Fellowship ; PRIN-INAF 2017 of Toward ; MIUR, PRIN 2017 ; Italian Space Agency (ASI) ; Spanish Ministry of Science, Innovation and Universities (MICIU) ; Spanish MICIU project ; Jenny and Antti Wihuri foundation ; Vilho, Yrjo and Kalle Vaisala foundation ; ANID BECAS/DOCTORADO NACIONAL ; Polish NCN MAESTRO grant ; Villum FONDEN ; Independent Research Fund Denmark ; Chinese Academy of Sciences (CAS) ; 2014-2020 ERDF Operational Programme ; Department of Economy, Knowledge, Business and University of the Regional Government of Andalusia ; ANID project Basal ; Magnus Ehrnrooth Foundation ; Public ESO Spectroscopic Survey for Transient Objects - PESSTO ; Instrument Centre for Danish Astrophysics (IDA) ; University of Copenhagen ; NOTSA ; UK Science and Technology Facilities Council ; National Aeronautics and Space Administration ; NASA ; Kepler/K2 grant ; HST ; STFC ; National Aeronautics and Space Administration ; Xinjiang Astronomical Observatory of the Chinese Academy of Sciences |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4333]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Cai, Y-Z |
| 作者单位 | 1.Xingming Observ, Mt Nanshan, Xinjiang, Peoples R China 2.Stockholm Univ, Dept Phys, Oskar Klein Ctr, AlbaNova, S-10691 Stockholm, Sweden 3.INAF Osservatorio Astron Abruzzo, Via M Maggini Snc, I-64100 Teramo, Italy 4.NSFs NOIRLab, Gemini Observ, Casilla 603, La Serena, Chile 5.Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands 6.Itagaki Astron Observ, Yamagata, Yamagata 9902492, Japan 7.Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, Wales 8.Shanghai Jiao Tong Univ, Dept Astron, Shanghai 200240, Peoples R China 9.Univ Warsaw, Astron Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland 10.Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Y-Z,Pastorello, A.,Fraser, M.,et al. Intermediate-luminosity red transients: Spectrophotometric properties and connection to electron-capture supernova explosions[J]. ASTRONOMY & ASTROPHYSICS,2021,654:30. |
| APA | Cai, Y-Z.,Pastorello, A..,Fraser, M..,Botticella, M. T..,Elias-Rosa, N..,...&Young, D. R..(2021).Intermediate-luminosity red transients: Spectrophotometric properties and connection to electron-capture supernova explosions.ASTRONOMY & ASTROPHYSICS,654,30. |
| MLA | Cai, Y-Z,et al."Intermediate-luminosity red transients: Spectrophotometric properties and connection to electron-capture supernova explosions".ASTRONOMY & ASTROPHYSICS 654(2021):30. |
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来源：新疆天文台
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