Late-time <i>HST</i> photometry of SN1994I

Simple item page
dc.contributor.authorClocchiatti, Alejandro
dc.contributor.authorWheeler, J. Craig
dc.contributor.authorKirshner, Robert P.
dc.contributor.authorBranch, David
dc.contributor.authorChallis, Peter
dc.contributor.authorChevalier, Roger A.
dc.contributor.authorFilippenko, Alexei V.
dc.contributor.authorFransson, Claes
dc.contributor.authorGarnavich, Peter
dc.contributor.authorLeibundgut, Bruno
dc.contributor.authorPanagia, Nino
dc.contributor.authorPhillips, Mark M.
dc.contributor.authorSuntzeff, Nicholas B.
dc.contributor.authorHoeflich, Peter A.
dc.contributor.authorGallardo, Jose
dc.date.accessioned2025-01-21T01:05:09Z
dc.date.available2025-01-21T01:05:09Z
dc.date.issued2008
dc.description.abstractWe present multicolor Hubble Space Telescope ( HST) WFPC2 broadband observations of the Type Ic SN 1994I obtained similar to 280 d after maximum light. We measure the brightness of the SN and, relying on the detailed spectroscopic database of SN 1994I, we transform the ground-based photometry obtained at early times to the HST photometric system, deriving light curves for the WFPC2 F439W, F555W, F675W, and F814W passbands that extend from 7 days before to 280 days after maximum. We use the multicolor photometry to build a quasi-bolometric light curve of SN 1994I, and compare it with similarly constructed light curves of other supernovae. In doing so, we propose and test a scaling in energy and time that allows for a more meaningful comparison of the exponential tails of different events. Through comparison with models, we find that the late-time light curve of SN 1994I is consistent with that of spherically symmetric ejecta in homologous expansion, for which the ability to trap the gamma-rays produced by the radioactive decay of Co-56 diminishes roughly as the inverse of time squared. We also find that by the time of the HST photometry, the light curve was significantly energized by the annihilation of positrons.
dc.fuente.origenWOS
dc.identifier.eissn1538-3873
dc.identifier.issn0004-6280
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95835
dc.identifier.wosidWOS:000254589500005
dc.issue.numero865
dc.language.isoen
dc.pagina.final300
dc.pagina.inicio290
dc.revistaPublications of the astronomical society of the pacific
dc.rightsacceso restringido
dc.titleLate-time <i>HST</i> photometry of SN1994I
dc.typeartículo
dc.volumen120
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas