Spectroscopic Observations Of Sn 2012fr: A Luminous, Normal Type Ia Supernova With Early High-Velocity Features And A Late Velocity Plateau

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dc.contributor.utaustinauthorSilverman, Jeffrey M.en_US
dc.creatorChildress, M. J.en_US
dc.creatorScalzo, R. A.en_US
dc.creatorSim, S. A.en_US
dc.creatorTucker, B. E.en_US
dc.creatorYuan, F.en_US
dc.creatorSchmidt, Brian P.en_US
dc.creatorCenko, S. Bradleyen_US
dc.creatorSilverman, Jeffrey M.en_US
dc.creatorContreras, C.en_US
dc.creatorHsiao, Eric Y.en_US
dc.creatorPhillips, M.en_US
dc.creatorMorrell, N.en_US
dc.creatorJha, Saurabh W.en_US
dc.creatorMcCully, C.en_US
dc.creatorFilippenko, Alexei V.en_US
dc.creatorAnderson, J. P.en_US
dc.creatorBenetti, S.en_US
dc.creatorBufano, F.en_US
dc.creatorde Jaeger, T.en_US
dc.creatorForster, F.en_US
dc.creatorGal-Yam, Avishayen_US
dc.creatorLe Guillou, L.en_US
dc.creatorMaguire, K.en_US
dc.creatorMaund, J.en_US
dc.creatorMazzali, P. A.en_US
dc.creatorPignata, G.en_US
dc.creatorSmartt, S.en_US
dc.creatorSpyromilio, J.en_US
dc.creatorSullivan, Marken_US
dc.creatorTaddia, F.en_US
dc.creatorValenti, S.en_US
dc.creatorBayliss, D. D. R.en_US
dc.creatorBessell, M.en_US
dc.creatorBlanc, Guillermo A.en_US
dc.creatorCarson, D. J.en_US
dc.creatorClubb, K. I.en_US
dc.creatorde Burgh-Day, C.en_US
dc.creatorDesjardins, T. D.en_US
dc.creatorFang, J. J.en_US
dc.creatorFox, O. D.en_US
dc.creatorGates, E. L.en_US
dc.creatorHo, I. T.en_US
dc.creatorKeller, S.en_US
dc.creatorKelly, P. L.en_US
dc.creatorLidman, C.en_US
dc.creatorLoaring, N. S.en_US
dc.creatorMould, J. R.en_US
dc.creatorOwers, M.en_US
dc.creatorOzbilgen, S.en_US
dc.creatorPei, L.en_US
dc.creatorPickering, T.en_US
dc.creatorPracy, M. B.en_US
dc.creatorRich, J. A.en_US
dc.creatorSchaefer, B. E.en_US
dc.creatorScott, N.en_US
dc.creatorStritzinger, Maximillianen_US
dc.creatorVogt, F. P. A.en_US
dc.creatorZhou, G.en_US
dc.date.accessioned2016-04-28T19:31:36Z
dc.date.available2016-04-28T19:31:36Z
dc.date.issued2013-06en
dc.description.abstractWe present 65 optical spectra of the Type Ia SN 2012fr, 33 of which were obtained before maximum light. At early times, SN 2012fr shows clear evidence of a high-velocity feature (HVF) in the Si lambda 6355 line that can be cleanly decoupled from the lower velocity "photospheric" component. This Si lambda 6355 HVF fades by phase - 5; subsequently, the photospheric component exhibits a very narrow velocity width and remains at a nearly constant velocity of similar to 12,000 km s(-1) until at least five weeks after maximum brightness. The Ca II infrared triplet exhibits similar evidence for both a photospheric component at v approximate to 12,000 km s(-1) with narrow line width and long velocity plateau, as well as an HVF beginning at v approximate to 31,000 km s(-1) two weeks before maximum. SN 2012fr resides on the border between the "shallow silicon" and "core-normal" subclasses in the Branch et al. classification scheme, and on the border between normal and high-velocity Type Ia supernovae (SNe Ia) in the Wang et al. system. Though it is a clear member of the "low velocity gradient" group of SNe Ia and exhibits a very slow light-curve decline, it shows key dissimilarities with the overluminous SN 1991T or SN 1999aa subclasses of SNe Ia. SN 2012fr represents a well-observed SN Ia at the luminous end of the normal SN Ia distribution and a key transitional event between nominal spectroscopic subclasses of SNe Ia.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipAustralian Research Council Centre of Excellence for All-sky Astrophysics (CAAS-TRO) CE110001020en_US
dc.description.sponsorshipAustralian Research Council Future Fellowship FT0992259en_US
dc.description.sponsorshipCONICYT through FONDECYT grant 3110142en_US
dc.description.sponsorshipMillennium Center for Supernova Science P10-064-Fen_US
dc.description.sponsorshipEU/FP7 via an ERC granten_US
dc.description.sponsorshipFONDECYT 3120227en_US
dc.description.sponsorshipPrograma Bicentenario de Ciencia y Tecnologia de CONICYTen_US
dc.description.sponsorshipPrograma Iniciativa Cientifica Milenio de MIDEPLANen_US
dc.description.sponsorshipPRIN-INAFen_US
dc.description.sponsorshipproject "Transient Universe: from ESO Large to PESSTO"en_US
dc.description.sponsorshipNSF AST-0847157, AST-1008343, AST-1211916, AST-0907903| Richard and Rhoda Goldman Funden_US
dc.description.sponsorshipChristopher R. Redlich Funden_US
dc.description.sponsorshipTABASGO Foundationen_US
dc.description.sponsorshipW.M. Keck Foundationen_US
dc.description.sponsorshipNASAen_US
dc.identifierdoi:10.15781/T2TV4N
dc.identifier.Filename2013_06_spectroscopic.pdfen_US
dc.identifier.citationChildress, M. J., R. A. Scalzo, S. A. Sim, B. E. Tucker, F. Yuan, B. P. Schmidt, S. B. Cenko et al. "Spectroscopic observations of SN 2012fr: a luminous, normal type Ia supernova with early high-velocity features and a late velocity plateau." The Astrophysical Journal, Vol. 770, No. 1 (Jun., 2013): 29.en_US
dc.identifier.doi10.1088/0004-637x/770/1/29en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/34642
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectgalaxies: individual (ngc 1365)en_US
dc.subjectsupernovae: generalen_US
dc.subjectsupernovae:en_US
dc.subjectindividual (sn 2012fr)en_US
dc.subjecthubble-space-telescopeen_US
dc.subjectsub-chandrasekhar supernovaeen_US
dc.subjectextragalacticen_US
dc.subjectdistance scaleen_US
dc.subjectfield spectrograph wifesen_US
dc.subjecttime optical-spectraen_US
dc.subjectwhite-dwarfsen_US
dc.subjectlight curvesen_US
dc.subjectsodium-absorptionen_US
dc.subjectkey projecten_US
dc.subjectcircumstellar materialen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleSpectroscopic Observations Of Sn 2012fr: A Luminous, Normal Type Ia Supernova With Early High-Velocity Features And A Late Velocity Plateauen_US
dc.typeArticleen_US

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