Rapidly Evolving And Luminous Transients From Pan-STARRS1

dc.contributor.utaustinauthorMarion, G. H.en_US
dc.creatorDrout, M. R.en_US
dc.creatorChornock, Ryanen_US
dc.creatorSoderberg, Alicia M.en_US
dc.creatorSanders, N. E.en_US
dc.creatorMcKinnon, R.en_US
dc.creatorRest, A.en_US
dc.creatorFoley, Ryan J.en_US
dc.creatorMilisavljevic, Danen_US
dc.creatorMargutti, R.en_US
dc.creatorBerger, E.en_US
dc.creatorCalkins, M.en_US
dc.creatorFong, W.en_US
dc.creatorGezari, S.en_US
dc.creatorHuber, M. E.en_US
dc.creatorKankare, E.en_US
dc.creatorKirshner, Robert P.en_US
dc.creatorLeibler, C.en_US
dc.creatorLunnan, R.en_US
dc.creatorMattila, S.en_US
dc.creatorMarion, G. H.en_US
dc.creatorNarayan, G.en_US
dc.creatorRiess, Adam G.en_US
dc.creatorRoth, K. C.en_US
dc.creatorScolnic, D.en_US
dc.creatorSmartt, S. J.en_US
dc.creatorTonry, J. L.en_US
dc.creatorBurgett, W. S.en_US
dc.creatorChambers, K. C.en_US
dc.creatorHodapp, K. W.en_US
dc.creatorJedicke, R.en_US
dc.creatorKaiser, N.en_US
dc.creatorMagnier, E. A.en_US
dc.creatorMetcalfe, N.en_US
dc.creatorMorgan, J. S.en_US
dc.creatorPrice, P. A.en_US
dc.creatorWaters, C.en_US
dc.description.abstractIn the past decade, several rapidly evolving transients have been discovered whose timescales and luminosities are not easily explained by traditional supernovae (SNe) models. The sample size of these objects has remained small due, at least in part, to the challenges of detecting short timescale transients with traditional survey cadences. Here we present the results from a search within the Pan-STARRS1 Medium Deep Survey (PS1-MDS) for rapidly evolving and luminous transients. We identify 10 new transients with a time above half-maximum (t(1/2)) of less than 12 days and -16.5 > M> -20 mag. This increases the number of known events in this region of SN phase space by roughly a factor of three. The median redshift of the PS1-MDS sample is z = 0.275 and they all exploded in star-forming galaxies. In general, the transients possess faster rise than decline timescale and blue colors at maximum light (g(P1) - r(P1) less than or similar to -0.2). Best-fit blackbodies reveal photospheric temperatures/radii that expand/cool with time and explosion spectra taken near maximum light are dominated by a blue continuum, consistent with a hot, optically thick, ejecta. We find it difficult to reconcile the short timescale, high peak luminosity (L> 10(43) erg s(-1)), and lack of UV line blanketing observed in many of these transients with an explosion powered mainly by the radioactive decay of56Ni. Rather, we find that many are consistent with either (1) cooling envelope emission from the explosion of a star with a low-mass extended envelope that ejected very little (<0.03 M-circle dot) radioactive material, or (2) a shock breakout within a dense, optically thick, wind surrounding the progenitor star. After calculating the detection efficiency for objects with rapid timescales in the PS1-MDS we find a volumetric rate of 4800-8000 events yr(-1) Gpc(-3) (4%-7% of the core-collapse SN rate at z = 0.2).en_US
dc.description.sponsorshipNSF through a Graduate Research Fellowshipen_US
dc.description.sponsorshipDavid and Lucile Packard Foundation Fellowship for Science and Engineeringen_US
dc.description.sponsorshipJenny and Antti Wihuri Foundationen_US
dc.description.sponsorshipEuropean Research Council under the European Union 291222en_US
dc.description.sponsorshipNational Aeronautics and Space Administration NNX08AR22Gen_US
dc.description.sponsorshipPlanetary Science Division of the NASA Science Mission Directorate, the National Science Foundation AST-1238877en_US
dc.description.sponsorshipUniversity of Marylanden_US
dc.description.sponsorshipEotvos Lorand University (ELTE)en_US
dc.description.sponsorshipGemini Observatory GN-2011B-Q-3, GS-2012A-Q-31en_US
dc.identifier.citationDrout, M. R., R. Chornock, A. M. Soderberg, N. E. Sanders, R. McKinnon, A. Rest, R. J. Foley et al. "Rapidly Evolving and Luminous Transients from Pan-STARRS1." The Astrophysical Journal, Vol. 794, No. 1 (Oct., 2014): 23.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.subjectgamma-ray burstsen_US
dc.subjectcore-collapse supernovaeen_US
dc.subjectmass-metallicity relationen_US
dc.subjectdigital sky surveyen_US
dc.subjectmultiband light curvesen_US
dc.subjectstar-forming galaxiesen_US
dc.subjectia supernovaeen_US
dc.subjectshock breakouten_US
dc.subjectic supernovaen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleRapidly Evolving And Luminous Transients From Pan-STARRS1en_US

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