The Fast And Furious Decay Of The Peculiar Type Ic Supernova 2005Ek

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dc.contributor.utaustinauthorSilverman, Jeffrey M.en_US
dc.creatorDrout, M. R.en_US
dc.creatorSoderberg, Alicia M.en_US
dc.creatorMazzali, P. A.en_US
dc.creatorParrent, Jerod T.en_US
dc.creatorMargutti, R.en_US
dc.creatorMilisavljevic, Danen_US
dc.creatorSanders, N. E.en_US
dc.creatorChornock, Ryanen_US
dc.creatorFoley, Ryan J.en_US
dc.creatorKirshner, Robert P.en_US
dc.creatorFilippenko, Alexei V.en_US
dc.creatorLi, W.en_US
dc.creatorBrown, Peter J.en_US
dc.creatorCenko, S. Bradleyen_US
dc.creatorChakraborti, S.en_US
dc.creatorChallis, Peteren_US
dc.creatorFriedman, A.en_US
dc.creatorGaneshalingam, Mohanen_US
dc.creatorHicken, M.en_US
dc.creatorJensen, C.en_US
dc.creatorModjaz, M.en_US
dc.creatorPerets, H. B.en_US
dc.creatorSilverman, Jeffrey M.en_US
dc.creatorWong, D. S.en_US
dc.date.accessioned2016-04-28T19:39:03Z
dc.date.available2016-04-28T19:39:03Z
dc.date.issued2013-09en
dc.description.abstractWe present extensive multi-wavelength observations of the extremely rapidly declining Type Ic supernova (SN Ic), SN 2005ek. Reaching a peak magnitude of MR = -17.3 and decaying by similar to 3 mag in the first 15 days post-maximum, SN 2005ek is among the fastest Type I supernovae observed to date. The spectra of SN 2005ek closely resemble those of normal SN Ic, but with an accelerated evolution. There is evidence for the onset of nebular features at only nine days post-maximum. Spectroscopic modeling reveals an ejecta mass of similar to 0.3 M-circle dot that is dominated by oxygen (similar to 80%), while the pseudo-bolometric light curve is consistent with an explosion powered by similar to 0.03 M-circle dot of radioactive Ni-56. Although previous rapidly evolving events (e. g., SN 1885A, SN 1939B, SN 2002bj, SN 2010X) were hypothesized to be produced by the detonation of a helium shell on a white dwarf, oxygen-dominated ejecta are difficult to reconcile with this proposed mechanism. We find that the properties of SN 2005ek are consistent with either the edge-lit double detonation of a low-mass white dwarf or the iron-core collapse of a massive star, stripped by binary interaction. However, if we assume that the strong spectroscopic similarity of SN 2005ek to other SNe Ic is an indication of a similar progenitor channel, then a white-dwarf progenitor becomes very improbable. SN 2005ek may be one of the lowest mass stripped-envelope core-collapse explosions ever observed. We find that the rate of such rapidly declining Type I events is at least 1%-3% of the normal SN Ia rate.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNSFen_US
dc.description.sponsorshipDavid and Lucile Packard Foundation Fellowship for Science and Engineeringen_US
dc.description.sponsorshipNSF Astronomy and Astrophysics Postdoctoral Fellowship AST-1302771en_US
dc.description.sponsorshipU.S. National Science Foundation (NSF) SES 1056580en_US
dc.description.sponsorshipNational Science Foundation PHYS-1066293, NSF PHY11-25915en_US
dc.description.sponsorshipW. M. Keck Foundationen_US
dc.description.sponsorshipHarvard University Milton Funden_US
dc.identifierdoi:10.15781/T2R52C
dc.identifier.Filename2013_09_2005ek.pdfen_US
dc.identifier.citationDrout, M. R., A. M. Soderberg, P. A. Mazzali, J. T. Parrent, R. Margutti, D. Milisavljevic, N. E. Sanders et al. "The fast and furious decay of the peculiar type Ic supernova 2005ek." The Astrophysical Journal, Vol. 774, No. 1 (Sep., 2013): 58.en_US
dc.identifier.doi10.1088/0004-637x/774/1/58en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35022
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.subjectsupernovae: generalen_US
dc.subjectsupernovae: individual (sn2005ek)en_US
dc.subjectaccretion-induced collapseen_US
dc.subjectswift ultraviolet/optical telescopeen_US
dc.subjectautomatic imaging telescopeen_US
dc.subjecthelium shell detonationsen_US
dc.subjectnickel-richen_US
dc.subjectoutflowsen_US
dc.subjecth-ii regionsen_US
dc.subjectia supernovaeen_US
dc.subjectwhite-dwarfsen_US
dc.subjectlight curvesen_US
dc.subjecthosten_US
dc.subjectgalaxiesen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleThe Fast And Furious Decay Of The Peculiar Type Ic Supernova 2005Eken_US
dc.typeArticleen_US

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