J/MNRAS/451/1973ivo://CDS.VizieR/J/MNRAS/451/1973doi:10.26093/cds/vizier.74511973CDSSilverman J.M.Vinko J.Marion G.H.Wheeler J.C.Barna B.Szalai T.,Mulligan B.W.Filippenko A.V.2024-08-14T20:22:13Z2016-03-16T14:15:10ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frsupernovaespectroscopy'High-velocity features' (HVFs) are spectral features in Type Ia supernovae (SNe Ia) that have minima indicating significantly higher (by greater than about 6000km/s) velocities than typical 'photospheric-velocity features' (PVFs). The PVFs are absorption features with minima indicating typical photospheric (i.e. bulk ejecta) velocities (usually~9000-15000km/s near B-band maximum brightness). In this work, we undertake the most in-depth study of HVFs ever performed. The data set used herein consists of 445 low-resolution optical and near-infrared (NIR) spectra (at epochs up to 5d past maximum brightness) of 210 low-redshift SNe Ia that follow the 'Phillips relation'. A series of Gaussian functions is fit to the data in order to characterize possible HVFs of CaII H&K, SiII {lambda}6355, and the CaII NIR triplet. The temporal evolution of the velocities and strengths of the PVFs and HVFs of these three spectral features is investigated, as are possible correlations with other SN Ia observables. We find that while HVFs of CaII are regularly observed (except in underluminous SNe Ia, where they are never found), HVFs of Siii {lambda}6355 are significantly rarer, and they tend to exist at the earliest epochs and mostly in objects with large photospheric velocities. It is also shown that stronger HVFs of SiII {lambda}6355 are found in objects that lack CII absorption at early times and that have red ultraviolet/optical colours near maximum brightness. These results lead to a self-consistent connection between the presence and strength of HVFs of SiII {lambda}6355 and many other mutually correlated SN Ia observables, including photospheric velocity.2015MNRAS.451.1973Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/451/1973CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/451/1973https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/451/1973http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/451/1973https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/451/1973https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/451/1973http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/451/1973GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/451/1973/tablea1 (Summary of SNe Ia)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/451/1973/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/451/1973/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/451/1973/tablea1?GETtext/xml+votable180.050000true189.419666711.823750.0055555555555555566/50 224 248 611 626 697 928 1688 1725 1796 2142 2169 2227 2232 2340 2347 2353 2409 2412 2473 3393 3415 4114 4401 4447 4577 4583 4684 4719 4993 4999 5100 5680 5975 6062 6101 6178 6936 7104 7166 7369 7523 7564 7681 7747 8064 8267 8341 8526 8556 9449 9560 9640 9751 10144 10203 10206 10232 10377 10379 10391 10401 10454 10563 10767 10978 10984 11064 11071 11158 11218 11246 11273 11434 11713 11886 11939 12103 12455 13313 13316 13350 13505 13529 13536 14882 15056 15085 15548 15954 16194 16690 17152 17197 17239 17340 17401 17500 17614 17662 17741 17817 17905 18016 18081 18206 18394 18535 18735 18753 19051 19084 19094 19116 19241 19283 19321 19387 19506 19515 19554 19560 19581 19619 19848 20014 20031 20140 20206 20237 20283 20370 21300 21857 22599 22826 23013 23023 23077 23179 23294 23349 23828 24716 24920 24926 25333 25513 25565 25615 25769-25770 25889 25960 26117 26268 26336 26432 26563 26697 27348 27367 27491 27728 27738 27761 27773 27910 27914 28035 28075 28089 28112 28126 28249 28353 28368 28498 28572 28619 30044 31218 31230 31293 31628 31685 32136 32187 32447 32561 32602 32620 34531 34534 36805 40252 40294 40379 44026 44915 45036 45041 48665https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/451/1973?format=asciidefaultJ/MNRAS/451/1973/tablea1Summary of SNe IaSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSN namemeta.id;meta.maincharprimaryn_SN[ghi] Note on SN (G1)meta.notecharDm15(B)? Delta m15 (decline in B after 15 days)magphot.mag;arith.difffloatnullablee_Dm15(B)? rms uncertainty on Dm15(B)0.01magstat.errorintnullable(B-V)0? Deredenned B-V colour indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_(B-V)0? rms uncertainty on (B-V)00.001magstat.errorintnullableSNID(Sub)Type (1)src.classcharBTypeClassification based on the velocity gradient of the SiII6355 line (Benetti et al., 2005ApJ...623.1011B) (2)src.classcharWTypeClassification based on the velocity of the SiII 6355 line (Wang et al. 2009) (3)src.classcharPhasesPhases are in rest-frame daysdtime.phasechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/451/1973/tablea2CaHK fit resultsSNSN namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_SN[h] Note on SN (G1)meta.notecharPhasePhase in rest-frame daysdtime.phasefloatHVFv? High-velocity feature velocity1000km.s**-1phys.velocfloatnullablee_HVFv? rms uncertainty on HVFv1000km.s**-1stat.errorfloatnullableHVFpEW? High-velocity feature pseudo equivalent width0.1nmspect.line.eqWidthfloatnullablee_HVFpEW? rms uncertainty on HVFpEW0.1nmstat.errorfloatnullablePVFv? Photospheric-velocity feature velocity1000km.s**-1phys.velocfloatnullablee_PVFv? rms uncertainty on PVFv1000km.s**-1stat.errorfloatnullablePVFpEW? Photospheric-velocity feature pseudo equivalent width0.1nmspect.line.eqWidthfloatnullablee_PVFpEW? rms uncertainty on PVFpEW0.1nmstat.errorfloatnullableRCaHK? RCaHK index (1)spect.indexfloatnullablee_RCaHK? rms uncertainty on RCaHKstat.errorfloatnullableSiII3858v? SiII3858 line velocity1000km.s**-1spect.dopplerVelocfloatnullablee_SiII3858v? rms uncertainty on SiII3858v1000km.s**-1stat.errorfloatnullableSiII3858pEW? SiII3858 pseudo equivalent width0.1nmspect.line.eqWidthfloatnullablee_SiII3858pEW? rms uncertainty on SiII3858pEW0.1nmstat.errorfloatnullableJ/MNRAS/451/1973/tablea3SiII6355 fit resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSN namemeta.id;meta.maincharn_SN[ghi] Note on SN (G1)meta.notecharPhasePhases are in rest-frame daysdtime.phasefloatHVFv? High-velocity feature velocity1000km.s**-1phys.velocfloatnullablee_HVFv? rms uncertainty on HVFv1000km.s**-1stat.errorfloatnullableHVFpEW? High-velocity feature pseudo equivalent width0.1nmspect.line.eqWidthfloatnullablee_HVFpEW? rms uncertainty on HVFpEW0.1nmstat.errorfloatnullablePVFv? Photospheric-velocity feature velocity1000km.s**-1phys.velocfloatnullablee_PVFv? rms uncertainty on PVFv1000km.s**-1stat.errorfloatnullablePVFpEW? Photospheric-velocity feature pseudo equivalent width0.1nmspect.line.eqWidthfloatnullablee_PVFpEW? rms uncertainty on PVFpEW0.1nmstat.errorfloatnullableRSi? RSi index (1)spect.indexfloatnullablee_RSi? rms uncertainty on RSistat.errorfloatnullableJ/MNRAS/451/1973/tablea4CaIR3 fit resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSN namemeta.id;meta.maincharn_SN[ghi] Note on SN (G1)meta.notecharPhasePhase in rest-frame daysdtime.phasefloatHVFv? High-velocity feature velocity1000km.s**-1phys.velocfloatnullablee_HVFv? rms uncertainty on HVFv1000km.s**-1stat.errorfloatnullableHVFpEW? High-velocity feature pseudo equivalent width0.1nmspect.line.eqWidthfloatnullablee_HVFpEW? rms uncertainty on HVFpEW0.1nmstat.errorfloatnullablePVFv? Photospheric-velocity feature velocity1000km.s**-1phys.velocfloatnullablee_PVFv? rms uncertainty on PVFv1000km.s**-1stat.errorfloatnullablePVFpEW? Photospheric-velocity feature pseudo equivalent width0.1nmspect.line.eqWidthfloatnullablee_PVFpEW? rms uncertainty on PVFpEW0.1nmstat.errorfloatnullableRCaIR3? RCaIR3 indexspect.indexfloatnullablee_RCaIR3? rms uncertainty on RCaIR3 (1)stat.errorfloatnullable