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Seeing Double: ASASSN-18bt Exhibits a Two-component Rise in the Early-time K2 Light

文献类型：期刊论文

作者Shappee, B. J.33; Holoien, T. W. -S.34; Drout, M. R.34; Auchettl, K.35,36,37; Stritzinger, M. D.38,39; Kochanek, C. S.35,40; Stanek, K. Z.35,40; Shaya, E.41; Narayan, G.42; Brown, J. S.40
刊名ASTROPHYSICAL JOURNAL
出版日期2019
卷号870期号:1页码:14
ISSN号0004-637X
关键词supernovae: individual (ASASSN-18bt, SN 2018oh)
DOI10.3847/1538-4357/aaec79
英文摘要On 2018 February 4.41, the All-Sky Automated Survey for SuperNovae (ASAS-SN) discovered ASASSN-18bt in the K2 Campaign 16 field. With a redshift of z = 0.01098 and a peak apparent magnitude of B-max = 14.31, ASASSN-18bt is the nearest and brightest SNe Ia yet observed by the Kepler spacecraft. Here we present the discovery of ASASSN-18bt, the K2 light curve, and prediscovery data from ASAS-SN and the Asteroid Terrestrial-impact Last Alert System. The K2 early-time light curve has an unprecedented 30-minute cadence and photometric precision for an SN. Ia light curve, and it unambiguously shows a similar to 4 day nearly linear phase followed by a steeper rise. Thus, ASASSN-18bt joins a growing list of SNe Ia whose early light curves are not well described by a single power law. We show that a double-power-law model fits the data reasonably well, hinting that two physical processes must be responsible for the observed rise. However, we find that current models of the interaction with a nondegenerate companion predict an abrupt rise and cannot adequately explain the initial, slower linear phase. Instead, we find that existing published models with shallow Ni-56 are able to span the observed behavior and, with tuning, may be able to reproduce the ASASSN-18bt light curve. Regardless, more theoretical work is needed to satisfactorily model this and other early-time SNe. Ia light curves. Finally, we use Swift X-ray nondetections to constrain the presence of circumstellar material (CSM) at much larger distances and lower densities than possible with the optical light curve. For a constant-density CSM, these nondetections constrain rho < 4.5 x 10(5) cm(-3) at a radius of 4 x 10(15) cm from the progenitor star. Assuming a wind-like environment, we place mass loss limits of <(M)over dot> < 8 x 10(-6) M-circle dot yr(-1). for v(w) =. 100 km s(-1), ruling out some symbiotic progenitor systems. This work highlights the power of well-sampled early-time data and the need for immediate multiband, high-cadence follow-up for progress in understanding SNe Ia.
WOS关键词WHITE-DWARF MODELS ; I SUPER-NOVAE ; ECCENTRICITY OSCILLATIONS ; EVOLUTION ; COMPANION ; BINARIES ; SPECTRA ; SYSTEMS ; STARS
资助项目NASA through Hubble Fellowship - Space Telescope Science Institute[HF-51348.001] ; VILLUM FONDEN[13261] ; NSF[AST-1515876] ; NSF[AST-1515927] ; NSF[AST-0908816] ; NSFC[11573003] ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative[IC120009] ; Scialog Scholar grant from the Research Corporation[24215] ; NASA[NNX16AB25G] ; NASA[NAS 5-26555] ; David G. Price Fellowship for Astronomical Instrumentation ; National Science Foundation Graduate Research Fellowship[DGE-1343012] ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)[CE170100013] ; Robert Martin Ayers Sciences Fund ; 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 (CAS-SACA) ; Villum Foundation ; National Aeronautics and Space Administration
WOS研究方向Astronomy & Astrophysics
语种英语
出版者IOP PUBLISHING LTD
WOS记录号WOS:000454551600002
资助机构NASA through Hubble Fellowship - Space Telescope Science Institute ; NASA through Hubble Fellowship - Space Telescope Science Institute ; VILLUM FONDEN ; VILLUM FONDEN ; NSF ; NSF ; NSFC ; NSFC ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative ; Scialog Scholar grant from the Research Corporation ; Scialog Scholar grant from the Research Corporation ; NASA ; NASA ; David G. Price Fellowship for Astronomical Instrumentation ; David G. Price Fellowship for Astronomical Instrumentation ; National Science Foundation Graduate Research Fellowship ; National Science Foundation Graduate Research Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Robert Martin Ayers Sciences Fund ; Robert Martin Ayers Sciences Fund ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Mt. Cuba Astronomical Foundation ; Mt. Cuba Astronomical Foundation ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) ; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) ; Villum Foundation ; Villum Foundation ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA through Hubble Fellowship - Space Telescope Science Institute ; NASA through Hubble Fellowship - Space Telescope Science Institute ; VILLUM FONDEN ; VILLUM FONDEN ; NSF ; NSF ; NSFC ; NSFC ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative ; Scialog Scholar grant from the Research Corporation ; Scialog Scholar grant from the Research Corporation ; NASA ; NASA ; David G. Price Fellowship for Astronomical Instrumentation ; David G. Price Fellowship for Astronomical Instrumentation ; National Science Foundation Graduate Research Fellowship ; National Science Foundation Graduate Research Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Robert Martin Ayers Sciences Fund ; Robert Martin Ayers Sciences Fund ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Mt. Cuba Astronomical Foundation ; Mt. Cuba Astronomical Foundation ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) ; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) ; Villum Foundation ; Villum Foundation ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA through Hubble Fellowship - Space Telescope Science Institute ; NASA through Hubble Fellowship - Space Telescope Science Institute ; VILLUM FONDEN ; VILLUM FONDEN ; NSF ; NSF ; NSFC ; NSFC ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative ; Scialog Scholar grant from the Research Corporation ; Scialog Scholar grant from the Research Corporation ; NASA ; NASA ; David G. Price Fellowship for Astronomical Instrumentation ; David G. Price Fellowship for Astronomical Instrumentation ; National Science Foundation Graduate Research Fellowship ; National Science Foundation Graduate Research Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Robert Martin Ayers Sciences Fund ; Robert Martin Ayers Sciences Fund ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Mt. Cuba Astronomical Foundation ; Mt. Cuba Astronomical Foundation ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) ; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) ; Villum Foundation ; Villum Foundation ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration ; NASA through Hubble Fellowship - Space Telescope Science Institute ; NASA through Hubble Fellowship - Space Telescope Science Institute ; VILLUM FONDEN ; VILLUM FONDEN ; NSF ; NSF ; NSFC ; NSFC ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative ; Scialog Scholar grant from the Research Corporation ; Scialog Scholar grant from the Research Corporation ; NASA ; NASA ; David G. Price Fellowship for Astronomical Instrumentation ; David G. Price Fellowship for Astronomical Instrumentation ; National Science Foundation Graduate Research Fellowship ; National Science Foundation Graduate Research Fellowship ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) ; Robert Martin Ayers Sciences Fund ; Robert Martin Ayers Sciences Fund ; Gordon and Betty Moore Foundation ; Gordon and Betty Moore Foundation ; Mt. Cuba Astronomical Foundation ; Mt. Cuba Astronomical Foundation ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Center for Cosmology and AstroParticle Physics at the Ohio State University ; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) ; Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA) ; Villum Foundation ; Villum Foundation ; National Aeronautics and Space Administration ; National Aeronautics and Space Administration
源URL[http://ir.bao.ac.cn/handle/114a11/24267]  
专题中国科学院国家天文台
通讯作者Shappee, B. J.
作者单位1.Univ Chile, Ctr Math Modeling, Santiago, Chile
2.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
3.Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA
4.Gemini Observ, La Serena, Chile
5.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
6.Australian Natl Univ, Res Sch Astron & Astrophys, Mt Stromlo Observ, Via Cotter Rd, Canberra, ACT 2611, Australia
7.ARC Ctr Excellence All Sky Astrophys CAASTRO, Sydney, NSW, Australia
8.Australian Natl Univ, Natl Ctr Publ Awareness Sci, Canberra, ACT 2601, Australia
9.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
10.Cerro Tololo Interamer Observ, Casilla 603, La Serena, Chile
推荐引用方式
GB/T 7714		 Shappee, B. J.,Holoien, T. W. -S.,Drout, M. R.,et al. Seeing Double: ASASSN-18bt Exhibits a Two-component Rise in the Early-time K2 Light[J]. ASTROPHYSICAL JOURNAL,2019,870(1):14.
APA Shappee, B. J..,Holoien, T. W. -S..,Drout, M. R..,Auchettl, K..,Stritzinger, M. D..,...&Strampelli, G. M..(2019).Seeing Double: ASASSN-18bt Exhibits a Two-component Rise in the Early-time K2 Light.ASTROPHYSICAL JOURNAL,870(1),14.
MLA Shappee, B. J.,et al."Seeing Double: ASASSN-18bt Exhibits a Two-component Rise in the Early-time K2 Light".ASTROPHYSICAL JOURNAL 870.1(2019):14.

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