J/MNRAS/454/3816ivo://CDS.VizieR/J/MNRAS/454/3816doi:10.26093/cds/vizier.74543816CDSChildress M.J.Hillier D.J.Seitenzahl I.Sullivan M.Maguire K.,Taubenberger S.Scalzo R.Ruiter A.Blagorodnova N.Camacho Y.,Castillo J.Elias-Rosa N.Fraser M.Gal-Yam A.Graham M.Howell D.A.,Inserra C.Jha S.W.Kumar S.Mazzali P.A.McCully C.,Morales-Garoffolo A.Pandya V.Polshaw J.Schmidt B.Smartt S.,Smith K.W.Sollerman J.Spyromilio J.Tucker B.Valenti S.Walton N.,Wolf C.Yaron O.Young D.R.Yuan F.Zhang B.2024-08-15T20:16:14Z2018-01-29T14:02:56ZCDS support team

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

cds-question@unistra.frsupernovaenebulaeredshiftedvisible-astronomybroad-band-photometryspectroscopyThe light curves of Type Ia supernovae (SNe Ia) are powered by the radioactive decay of ^56^Ni to ^56^Co at early times, and the decay of ^56^Co to ^56^Fe from ~60 d after explosion. We examine the evolution of the [CoIII] {lambda}5893 emission complex during the nebular phase for SNe Ia with multiple nebular spectra and show that the line flux follows the square of the mass of ^56^Co as a function of time. This result indicates both efficient local energy deposition from positrons produced in ^56^Co decay and long-term stability of the ionization state of the nebula. We compile SN Ia nebular spectra from the literature and present 21 new late-phase spectra of 7 SNe Ia, including SN 2014J. From these we measure the flux in the [CoIII] {lambda}5893 line and remove its well-behaved time dependence to infer the initial mass of ^56^Ni (M_Ni_) produced in the explosion. We then examine ^56^Ni yields for different SN Ia ejected masses (M_ej_ - calculated using the relation between light-curve width and ejected mass) and find that the ^56^Ni masses of SNe Ia fall into two regimes: for narrow light curves (low stretch s~0.7-0.9), M_Ni_ is clustered near M_Ni_~0.4M_{sun}_ and shows a shallow increase as M_ej_ increases from ~1 to 1.4M_{sun}_; at high stretch, M_ej_ clusters at the Chandrasekhar mass (1.4M_{sun}_) while M_Ni_ spans a broad range from 0.6 to 1.2M_{sun}_. This could constitute evidence for two distinct SN Ia explosion mechanisms.2015MNRAS.454.3816Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/454/3816CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)J/MNRAS/376/1301 : UBVRI light-curves of SN 2005cf (Pastorello+, 2007)J/MNRAS/377/1531 : Optical + infrared photometry of SN 2004eoJ/AJ/135/1598 : Optical spectroscopy of type Ia supernovae (Matheson+, 2008)J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)J/PASP/122/1 : BVRI light curves of SN 2007gi (Zhang+, 2010)J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)J/ApJ/730/119 : HST/WFC3 observations of Cepheids in SN Ia hostsJ/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)J/AJ/148/1 : Optical and ultraviolet photometry of SN 2012frJ/A+A/585/A19 : SN 2014J BV light curves (Bonanos+, 2016)J/AJ/151/125 : Optical and UV photometry of SN 2013dy (Zhai+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/454/3816https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/454/3816http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/454/3816https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/454/3816https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/454/3816http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/454/3816GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/454/3816/tableb1 (Nebular SN Ia host information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/454/3816/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/454/3816/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/454/3816/tableb1?GETtext/xml+votable180.050000true190.736166713.25650.0055555555555555566/4719 5975 7606 11246 11434 11496 12455 13907 15056 17340 23077 24920 24926 25344 25960 26336 27367 27512 27738 27918 28299 31230 34531 34534 36045 36287 36391 38956 43339 44915 48665https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/454/3816?format=asciiOpticaldefaultJ/MNRAS/454/3816/tableb1Nebular SN Ia host informationSNSN namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHostHost galaxy namemeta.id.parentcharzRedshift of host galaxysrc.redshiftdoubleDM[] Distance modulus of the SN host galaxymagphot.mag.distModfloate_DMUncertainty in DM (1)magstat.errorfloatMethMethod used to derive the distance (2)meta.notecharr_zReference for zmeta.ref;pos.framecharr_DMReference for DMmeta.ref;pos.framecharSimbadSimbad column added by the CDSmeta.ref.urlchar_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/454/3816/tableb2Light-curve fit results and sourcesSNSN namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian Date for B-band maximum magnitudedtime.epochdoubleBrestRest frame B-band maximum magnitudemagphot.mag;em.opt.Bfloate_BrestUncertainty in Brestmagstat.errorfloatsSN light-curve stretchstat.fit.paramfloate_sUncertainty in sstat.errorfloatcColour correctionarith.factor;phot.fluxfloate_cUncertainty in cstat.errorfloatRefLight-curve reference(s) (G1)meta.ref;pos.framecharJ/MNRAS/454/3816/tableb3Late-phase photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSN name (1)meta.id;meta.maincharPhase[144/430] Phasedtime.phaseintDateObservation datetime.epoch;obsnullableBmagB-band magnitudemagphot.mag;em.opt.Bfloate_BmagUncertainty in Bmagmagstat.error;phot.mag;em.opt.BfloatRefPhotometry reference (G1)meta.refcharJ/MNRAS/454/3816/tableb4Co line fluxes from spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNSN namemeta.id;meta.maincharDateObservation datetime.epoch;obsnullablelogCoFMeasured [Co III] {lambda}5893 line flux (in erg/cm^2^/s)log(mW.m**-2)phot.flux;spect.linefloate_logCoFUncertainty in logCoFlog(mW.m**-2)stat.errorfloatRescSpectrum rescale (1)stat.fit.paramfloatWaveMin? Minimum wavelength integration bound for the [Co III] {lambda}5893 flux measurement ({AA})0.1nminstr.bandwidthfloatnullableWaveMax? Maximum wavelength integration bound for the [Co III] {lambda}5893 flux measurement ({AA})0.1nminstr.bandwidthfloatnullable