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A study in scarlet II. Spectroscopic properties of a sample of intermediate-luminosity red transients

文献类型：期刊论文

作者Valerin, G.60; Pastorello, A.60; Mason, E.59; Reguitti, A.58,60; Benetti, S.60; Cai YZ(蔡永志)55,56,57; Chen, T.-W.54; Eappachen, D.52,53; Elias, N.51,60; Fraser, M.50
刊名ASTRONOMY & ASTROPHYSICS
出版日期2025-03-07
卷号695
关键词circumstellar matter supernovae: general supernovae: individual: NGC 300 2008OT-1 supernovae: individual: AT 2019abn supernovae: individual: AT 2019ahd supernovae: individual: AT 2019udc
ISSN号0004-6361
DOI10.1051/0004-6361/202451735
产权排序第4完成单位
文献子类Article
英文摘要Aims. We investigate the spectroscopic characteristics of intermediate-luminosity Red Transients (ILRTs), a class of elusive objects with peak luminosity between that of classical novae and standard supernovae. Our goal is to provide a stepping stone in the path to unveiling the physical origin of these events based on the analysis of the collected datasets. Methods. We present the extensive optical and near-infrared (NIR) spectroscopic monitoring of four ILRTs, namely NGC 300 2008OT-1, AT 2019abn, AT 2019ahd and AT 2019udc. First we focus on the evolution of the most prominent spectral features observed in the low-resolution spectra. We then present a more detailed description of the high-resolution spectrum collected for NGC 300 2008OT-1 with the Very Large Telescope equipped with UVES. Finally, we describe our analysis of late-time spectra of NGC 300 2008OT-1 and AT 2019ahd through comparisons with both synthetic and observed spectra. Results. Balmer and Ca lines dominate the optical spectra, revealing the presence of slowly moving circumstellar medium (CSM) around the objects. The line luminosity of H alpha, H beta, and Ca II NIR triplet presents a double peaked evolution with time, possibly indicative of interaction between fast ejecta and the slow CSM. The high-resolution spectrum of NGC 300 2008OT-1 reveals a complex circumstellar environment, with the transient being surrounded by a slow (similar to 30 km s(-1)) progenitor wind. At late epochs, optical spectra of NGC 300 2008OT-1 and AT 2019ahd show broad (similar to 2500 km s(-1)) emission features at similar to 6170 & Aring; and similar to 7000 & Aring; which are unprecedented for ILRTs. We find that these lines originate most likely from the blending of several narrow lines, possibly of iron-peak elements.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
WOS关键词ELECTRON-CAPTURE SUPERNOVAE ; NGC 300 ; OPTICAL TRANSIENT ; SPECTRAL EVOLUTION ; SN 2008S ; CANDIDATE ; MODELS ; NOVAE ; PROBE ; LINE
资助项目PRIN-INAF 2022 Shedding light on the nature of gap transients: from the observations to the models; GRAWITA Large Program Grant; National Natural Science Foundation of China (NSFC)[12303054]; Yunnan Fundamental Research Projects[202401AU070063]; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001]; Spanish Ministerio de Ciencia e Innovacion (MCIN); Agencia Estatal de Investigacion (AEI); European Social Fund (ESF); ANID, Millennium Science Initiative[ICN12_009]; European Research Council (ERC) under the European Union[948381]; Heising-Simons Foundation; DFG[HA 1850/28-1]; Academy of Finland[324504]; Academy of Finland[328898]; Research Council of Finland[340613]; Instrument Centre for Danish Astrophysics (IDA); Finnish Centre for Astronomy with ESO (FINCA) via Academy of Finland[306531]; NSF[2108032]; NSF[2308181]; NSF[AST-1911225]; NSF[AST-1911151]; Heising-Simons Foundation[2020-1864]; Research Council of Finland[324504]; Research Council of Finland[328898]; Research Council of Finland[353019]; NASA SWIFT grant[80NSSC19K1639]; UK Science and Technology Facilities Council; ESO program[1103.D-0328]; ESO program[106.216C]; European Union
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001439267100017
出版者EDP SCIENCES S A
资助机构PRIN-INAF 2022 Shedding light on the nature of gap transients: from the observations to the models ; GRAWITA Large Program Grant ; National Natural Science Foundation of China (NSFC)[12303054] ; Yunnan Fundamental Research Projects[202401AU070063] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; Spanish Ministerio de Ciencia e Innovacion (MCIN) ; Agencia Estatal de Investigacion (AEI) ; European Social Fund (ESF) ; ANID, Millennium Science Initiative[ICN12_009] ; European Research Council (ERC) under the European Union[948381] ; Heising-Simons Foundation ; DFG[HA 1850/28-1] ; Academy of Finland[324504, 328898] ; Research Council of Finland[340613] ; Instrument Centre for Danish Astrophysics (IDA) ; Finnish Centre for Astronomy with ESO (FINCA) via Academy of Finland[306531] ; NSF[2108032, 2308181, AST-1911225, AST-1911151] ; Heising-Simons Foundation[2020-1864] ; Research Council of Finland[324504, 328898, 353019] ; NASA SWIFT grant[80NSSC19K1639] ; UK Science and Technology Facilities Council ; ESO program[1103.D-0328, 106.216C] ; European Union[730890] ; [AST-1821987] ; [1813466] ; [1908972] ; [20201864]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28217]  
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
作者单位1.Space Telescope Science Institute, Baltimore, MD, USA;
2.Indian Institute Of Astrophysics, 100 Feet Rd, Santhosapuram, 2nd Block, Koramangala, Bengaluru, Karnataka 560034, India
3.Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, USA;
4.Manipal Centre for Natural Sciences, Manipal Academy of Higher Education, Manipal, 576104 Karnataka, India;
5.Niels Bohr Institute, University of Copenhagen, Jagtvej 128, 2200 København N, Denmark;
6.Cosmic Dawn Center (DAWN), Rådmandsgade 64, 2200 Copenhagen N., Denmark;
7.Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA;
8.Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße 1, 85748 Garching, Germany;
9.Department of Astronomy, University of Virginia, Charlottesville, VA 22904, USA;
10.IAASARS, National Observatory of Athens, Metaxa & Vas. Pavlou St., 15236 Penteli, Athens, Greece;
推荐引用方式
GB/T 7714		 Valerin, G.,Pastorello, A.,Mason, E.,et al. A study in scarlet II. Spectroscopic properties of a sample of intermediate-luminosity red transients[J]. ASTRONOMY & ASTROPHYSICS,2025,695.
APA Valerin, G..,Pastorello, A..,Mason, E..,Reguitti, A..,Benetti, S..,...&Young, D. R..(2025).A study in scarlet II. Spectroscopic properties of a sample of intermediate-luminosity red transients.ASTRONOMY & ASTROPHYSICS,695.
MLA Valerin, G.,et al."A study in scarlet II. Spectroscopic properties of a sample of intermediate-luminosity red transients".ASTRONOMY & ASTROPHYSICS 695(2025).

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