Hubble Space Telescope And Ground-Based Observations Of The Type Iax Supernovae SN 2005Hk And SN 2008A

dc.contributor.utaustinauthorSilverman, Jeffrey M.en_US
dc.contributor.utaustinauthorWheeler, J. Craigen_US
dc.creatorMcCully, C.en_US
dc.creatorJha, Saurabh W.en_US
dc.creatorFoley, Ryan J.en_US
dc.creatorChornock, Ryanen_US
dc.creatorHoltzman, Jon A.en_US
dc.creatorBalam, D. D.en_US
dc.creatorBranch, D.en_US
dc.creatorFilippenko, Alexei V.en_US
dc.creatorFrieman, J.en_US
dc.creatorFynbo, J.en_US
dc.creatorGalbany, Lluisen_US
dc.creatorGaneshalingam, Mohanen_US
dc.creatorGarnavich, Peter M.en_US
dc.creatorGraham, M. L.en_US
dc.creatorHsiao, Eric Y.en_US
dc.creatorLeloudas, G.en_US
dc.creatorLeonard, D. C.en_US
dc.creatorLi, W. D.en_US
dc.creatorRiess, Adam G.en_US
dc.creatorSako, Masaoen_US
dc.creatorSchneider, Donald P.en_US
dc.creatorSilverman, Jeffrey M.en_US
dc.creatorSollerman, Jesperen_US
dc.creatorSteele, Thea N.en_US
dc.creatorThomas, R. C.en_US
dc.creatorWheeler, J. Craigen_US
dc.creatorZheng, C.en_US
dc.description.abstractWe present Hubble Space Telescope (HST) and ground-based optical and near-infrared observations of SN 2005hk and SN 2008A, typical members of the Type Iax class of supernovae (SNe). Here we focus on late-time observations, where these objects deviate most dramatically from all other SN types. Instead of the dominant nebular emission lines that are observed in other SNe at late phases, spectra of SNe 2005hk and 2008A show lines of Fe II, Ca II, and Fe I more than a year past maximum light, along with narrow [ Fe II] and [ Ca II] emission. We use spectral features to constrain the temperature and density of the ejecta, and find high densities at late times, with n(e) greater than or similar to 10(9) cm(-3). Such high densities should yield enhanced cooling of the ejecta, making these objects good candidates to observe the expected "infrared catastrophe," a generic feature of SN Ia models. However, our HST photometry of SN 2008A does not match the predictions of an infrared catastrophe. Moreover, our HST observations rule out a "complete deflagration" that fully disrupts the white dwarf for these peculiar SNe, showing no evidence for unburned material at late times. Deflagration explosion models that leave behind a bound remnant can match some of the observed properties of SNe Iax, but no published model is consistent with all of our observations of SNe 2005hk and 2008A.en_US
dc.description.sponsorshipRutgers University through NASA/HST GO-11133.01, GO-11590.01en_US
dc.description.sponsorshipNSF Astronomy and Astrophysics Postdoctoral Fellowship AST-1302771en_US
dc.description.sponsorshipNSF AST-1109801, AST-1211916en_US
dc.description.sponsorshipSwedish Research Council 623-2011-7117en_US
dc.description.sponsorshipGary and Cynthia Bengieren_US
dc.description.sponsorshipRichard and Rhoda Goldman Funden_US
dc.description.sponsorshipTABASGO Foundationen_US
dc.description.sponsorshipNASA/HST GO-10877, AR-12623en_US
dc.description.sponsorshipSpace Telescope Science Instituteen_US
dc.description.sponsorshipAlfred P. Sloan Foundationen_US
dc.description.sponsorshipParticipating Institutionsen_US
dc.description.sponsorshipU.S. Department of Energyen_US
dc.description.sponsorshipJapanese Monbukagakushoen_US
dc.description.sponsorshipMax Planck Societyen_US
dc.description.sponsorshipHigher Education Funding Council for Englanden_US
dc.identifier.citationMcCully, Curtis, Saurabh W. Jha, Ryan J. Foley, Ryan Chornock, Jon A. Holtzman, David D. Balam, David Branch et al. "Hubble Space Telescope and ground-based observations of the type Iax supernovae SN 2005hk and SN 2008A." The Astrophysical Journal, Vol. 786, No. 2 (May., 2014): 134.en_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.subjectsupernovae: generalen_US
dc.subjectsupernovae: individual (sn 2002cx, sn 2005hk, snen_US
dc.subjectdelayed-detonation modelen_US
dc.subjectlate-time spectraen_US
dc.subjectmass white-dwarfen_US
dc.subjectdark energyen_US
dc.subjectfaint typeen_US
dc.subjectthermonuclear supernovaeen_US
dc.subjectnebular spectraen_US
dc.subjecthipass catalogen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleHubble Space Telescope And Ground-Based Observations Of The Type Iax Supernovae SN 2005Hk And SN 2008Aen_US

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