<i>Hubble Space Telescope</i> observations of nine high-redshift essence supernovae

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dc.contributor.authorKrisciunas, K
dc.contributor.authorGarnavich, PM
dc.contributor.authorChallis, P
dc.contributor.authorPrieto, JL
dc.contributor.authorRiess, AG
dc.contributor.authorBarris, B
dc.contributor.authorAguilera, C
dc.contributor.authorBecker, AC
dc.contributor.authorBlondin, S
dc.contributor.authorChornock, R
dc.contributor.authorClocchiatti, A
dc.contributor.authorCovarrubias, R
dc.contributor.authorFilippenko, AV
dc.contributor.authorFoley, RJ
dc.contributor.authorHicken, M
dc.contributor.authorJha, S
dc.contributor.authorKirshner, RP
dc.contributor.authorLeibundgut, B
dc.contributor.authorLi, WD
dc.contributor.authorMatheson, T
dc.contributor.authorMiceli, A
dc.contributor.authorMiknaitis, G
dc.contributor.authorRest, A
dc.contributor.authorSalvo, ME
dc.contributor.authorSchmidt, BP
dc.contributor.authorSmith, RC
dc.contributor.authorSollerman, J
dc.contributor.authorSpyromilio, J
dc.contributor.authorStubbs, CW
dc.contributor.authorSuntzeff, NB
dc.contributor.authorTonry, JL
dc.contributor.authorWood-Vasey, WM
dc.date.accessioned2025-01-21T01:06:36Z
dc.date.available2025-01-21T01:06:36Z
dc.date.issued2005
dc.description.abstractWe present broadband light curves of nine supernovae ranging in redshift from 0.5 to 0.8. The supernovae were discovered as part of the ESSENCE project, and the light curves are a combination of Cerro Tololo 4 m and Hubble Space Telescope (HST) photometry. On the basis of spectra and/or light-curve fitting, eight of these objects are definitely Type Ia supernovae, while the classification of one is problematic. The ESSENCE project is a 5 yr endeavor to discover about 200 high-redshift Type Ia supernovae, with the goal of tightly constraining the time average of the equation-of-state parameter [w = p/(rho c(2))] of the "dark energy." To help minimize our systematic errors, all of our ground-based photometry is obtained with the same telescope and instrument. In 2003 the highest redshift subset of ESSENCE supernovae was selected for detailed study with HST. Here we present the first photometric results of the survey. We find that all but one of the ESSENCE supernovae have slowly declining light curves and that the sample is not representative of the low-redshift set of ESSENCE Type Ia supernovae. This is unlikely to be a sign of evolution in the population. We attribute the decline-rate distribution of HST events to a selection bias at the high-redshift edge of our sample and find that such a bias will infect other magnitude-limited Type Ia supernova searches unless appropriate precautions are taken.
dc.fuente.origenWOS
dc.identifier.eissn1538-3881
dc.identifier.issn0004-6256
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96188
dc.identifier.wosidWOS:000233576800002
dc.issue.numero6
dc.language.isoen
dc.pagina.final2472
dc.pagina.inicio2453
dc.revistaAstronomical journal
dc.rightsacceso restringido
dc.subjectdistance scale
dc.subjectgalaxies : distances and redshifts
dc.subjectsupernovae : general
dc.title<i>Hubble Space Telescope</i> observations of nine high-redshift essence supernovae
dc.typeartículo
dc.volumen130
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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