J/ApJS/220/20ivo://CDS.VizieR/J/ApJS/220/20doi:10.26093/cds/vizier.22200020CDSZhao X.Wang X.Maeda K.Sai H.Zhang T.Zhang J.Huang F.Rui L.,Zhou Q.Mo J.2017-12-18T07:57:39Z2015-12-08T11:47:20ZCDS support team

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

cds-question@unistra.frsupernovaespectroscopyline-intensitiesThe high-velocity features (HVFs) in optical spectra of type Ia supernovae (SNe Ia) are examined with a large sample including very early-time spectra (e.g., t<-7days). Multiple Gaussian fits are applied to examine the HVFs and their evolutions, using constraints on expansion velocities for the same species (i.e., SiII5972 and SiII6355). We find that strong HVFs tend to appear in SNe Ia with smaller decline rates (e.g., {Delta}m_15_(B)<~1.4mag), clarifying that the finding by Childress et al. (2014MNRAS.437..338C) for the Ca-HVFs in near-maximum-light spectra applies both to the Si-HVFs and Ca-HVFs in the earlier phase. The Si-HVFs seem to be more common in rapidly expanding SNe Ia, which is different from the earlier result that Ca-HVFs are associated with SNe Ia that have slower SiII6355 velocities at maximum light (i.e., V^Si^_max_). Moreover, SNe Ia with both stronger HVFs at early phases and larger V^Si^_max_ are found to have noticeably redder B-V colors and to occur preferentially in the inner regions of their host galaxies, while those with stronger HVFs but smaller V^Si^_max_ show opposite tendencies, suggesting that these two subclasses have different explosion environments and their HVFs may have different origins. We further examine the relationships between the absorption features of SiII6355 and CaII IR lines, and find that their photospheric components are well correlated in velocity and strength but that the corresponding HVFs show larger scatter. These results cannot be explained with ionization and/or thermal processes alone, and different mechanisms are required for the creation of HVF-forming regions in SNe Ia.2015ApJS..220...20Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/220/20CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)J/A+A/578/A9 : Optical and NIR spectra of SN iPTF13ebh (Hsiao+, 2015)J/MNRAS/444/3258 : Velocities and EW of PTF SNe Ia (Maguire+, 2014)J/AJ/148/1 : Optical and ultraviolet photometry of SN 2012fr (Zhang+, 2014)J/ApJ/773/53 : Type Ia SNe spectroscopy by the CSP (Folatelli+, 2013)J/ApJ/770/107 : Host galaxies of SNIa from SNfactory (Childress+, 2013)J/other/Sci/340.170 : Classifications of 188 SNe Ia (Wang+, 2013)J/MNRAS/425/1819 : Berkeley supernova Ia program. II. (Silverman+, 2012)J/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)J/ApJS/200/12 : CfA4: light curves for 94 type Ia SNe (Hicken+, 2012)J/AJ/143/126 : Spectroscopy of 462 nearby Type Ia supernovae (Blondin+, 2012)J/ApJS/199/26 : The 2MASS Redshift Survey (2MRS) (Huchra+, 2012)J/ApJ/749/18 : Swift/UVOT observations of 12 nearby SN-Ia (Brown+, 2012)J/ApJ/745/74 : Pre-maximum spectra of type Ia SNe (Folatelli+, 2012)J/MNRAS/410/1262 : Supernova Legacy Survey. Type Ia supernovae (Walker+, 2011)J/AJ/142/156 : The CSP (DR2): photometry of SNe Ia (Stritzinger+, 2011)J/A+A/529/L4 : Reddening law of type Ia supernovae (Chotard+, 2011)J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)J/AJ/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)J/PASP/122/1 : BVRI light curves of SN 2007gi (Zhang+, 2010)J/ApJ/700/331 : Light curves of type Ia supernovae (CfA3) (Hicken+, 2009)J/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)J/AJ/135/1598 : Optical spectroscopy of type Ia supernovae (Matheson+, 2008)J/A+A/477/717 : Spectroscopy of Type Ia supernovae (Bronder+, 2008)J/A+A/471/527 : Spectroscopy of SN 2005cf (Garavini+, 2007)J/AJ/131/527 : UBVRI light curves of 44 type Ia supernovae (Jha+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/220/20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/220/20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/220/20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/220/20https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/220/20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/220/20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/220/20/table1 (Photometric and spectroscopic parameters of type Ia supernovae)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/220/20/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/220/20/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/220/20/table1?GETtext/xml+votable180.050000true186.732208315.054750.0055555555555555566/248 626 697 928 977 1527 1677 1796 2184 2227 2232 2265 2340 2347 2473 3393 4114 4401 4447 4583 4684 4719 4988 4993 5632 5680 5815 5975 6101 6114 6178 6936 7023 7104 7166 7241 7262 7606 7659 7747 8085 8203 8522 8526 8556 8658 8667 8728 9443 9560 9578 9640 10206 10232 10563 10767 10817 10978 11064 11158 11246 11273 11392 11434 11496 11698 11713 11886 12455 12567 13350 13505 13514 13536 13907 14018 14882 15056 15085 15093 15205 15548 15954 15955 17207 17340 17401 17500 17614 17736 17741 17817 17828 17905 18016 18017 18081 18206 18214 18324 18325 18394 18735 18753 18895 18928 19051 19062 19084 19094 19116 19283 19506 19515 19560 19581 20014 20140 20237 20283 20356 20370 20699 21041 21300 21857 22826 23013 23023 23077 23157 23193 23294 23828 24920 25079 25141 25333 25513 25615 25769 25770 25889 25960 26336 26575 27348 27426 27491 27728 27738 27761 27914 27918 27945 27947 28035 28075 28089 28112 28167 28230 28249 28253 28353 28368 28453 28498 28572 30044 31218 31230 31628 32136 32187 32561 32569 32602 32620 34361 34493 34531 34534 36045 36201 36662 36805 37299 37668 39627 39677 39836 39863 40599 44000 44359 44660 44915 45036 45041 46882https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/220/20?format=asciiOpticaldefaultJ/ApJS/220/20/table1Photometric and spectroscopic parameters of type Ia supernovaerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNIAU SN Ia designationmeta.id;meta.maincharprimaryNfNumber of SiII/CaII fit for this SN (tables 3,4,5)meta.numberintnullableSubClWang et al. subclassification (2009ApJ...699L.139W) (1)src.classcharm15B[0.6/2]? Light-curve decline rate in B band (1993ApJ...413L.105P)magsrc.var.amplitudefloatnullablee_m15B[0.01/0.7]? m15B uncertaintymagstat.errorfloatnullableB-V? Peak B-V Color corrected for the Milky Way reddeningmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V? Uncertainty in peak B-V Colormagstat.error;phot.color;em.opt.BfloatnullableVcmb[64/24600]? Recession velocity in 3K CMB ref framekm/sphys.veloc;pos.frame;pos.cmbintnullableMTypeMorphological Hubble type of host galaxysrc.morph.typecharDType[-5/10]? Digital Hubble type of host galaxymeta.note;src.morph.typefloatnullableRsn[0.02/2.5]? Projected galactocentric distance of the SN in its host galaxy, in units of the galaxy radius (Rsn/Rgal)pos.distancefloatnullableKMAG[-26.3/-20.4]? Galaxy absolute K magnitudemagphys.magAbs;em.IR.Kfloatnullablee_KMAG[0.07/1]? uncertainty on KMAGmagstat.errorfloatnullableHVFSubclassifications of high velocity features, based on Rhvf from SiII 6355 absorption ("IB", "strong" or "weak")src.classcharRf(Si6355)e[0/1]? Rhvf from SiII 6355 absorption; at early phases -- t~-8d (2)spect.line.intensity;arith.ratiofloatnullableRf(CaIR)e[0.1/12.5]? Rhvf from CaII IR triplet; at early phases, t~-8d (2)spect.line.intensity;arith.ratiofloatnullableRf(CaIR)m[0/2.1]? Rhvf from CaII IR triplet; near maximum light (2)spect.line.intensity;arith.ratiofloatnullableProgSN Program References (3)meta.bibcharRefIndividual References (4)meta.refcharB12Display sources within 15" from Blondin+, 2012, J/AJ/143/126meta.ref.urlintnullableSNCatNumber of catalogs where this SN is present (Silverman+, 2012, J/MNRAS/425/1789 and J/MNRAS/425/1819; Folatelli+, 2013, J/ApJ/773/53 and Matheson+, 2008, J/AJ/135/1598)meta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad 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/ApJS/220/20/table3Fit results of the SiII absorption features {lambda}6355 and {lambda}5972 from Sample A (108 SNe)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNIAU SN Ia designationmeta.id;meta.maincharPhaseDays since the B-band maximum lightdtime.intervalfloatVSi6355[9153/17110] Photospheric velocity of SiII6355 absorptionkm/sspect.dopplerVelocintpEWSi6355[15/210] Pseudo-Equivalent width of the photospheric component of SiII6355 absorption0.1nmspect.line.eqWidthintVfSi6355[16000/24000] Velocity of the high-velocity feature of SiII 6355 absorptionkm/sspect.dopplerVelocintpEWfSi6355[0/125] Pseudo-Equivalent width of the high-velocity feature of SiII 63550.1nmspect.line.widthintRf(Si6355)[0/5.3] Ratio of pEWf to pEWspect.line.intensity;arith.ratiofloatVSi5972[9500/16915] Photospheric velocity of SiII5972km/sspect.dopplerVelocintpEWSi5972[0/66] Pseudo-Equivalent width of photospheric component of SiII 59720.1nmspect.line.eqWidthintJ/ApJS/220/20/table4Fit results of the CaII IR triplet of Sample B (47 SNe)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNIAU SN Ia designationmeta.id;meta.maincharPhaseDays since the B-band maximum lightdtime.intervalfloatVCaIR[9756/16010] Velocity of the photospheric components of CaII IR tripletkm/sspect.dopplerVelocintpEWCaIR[5/186] Pseudo-Equivalent width of the photospheric components of CaII IR triplet0.1nmspect.line.eqWidthintVfCaIR[19503/27299] Velocity of the high-velocity feature components of CaII IR tripletkm/sspect.dopplerVelocintpEWfCaIR[8/331] Pseudo-Equivalent width of the high-velocity feature components of CaII IR triplet0.1nmspect.line.widthintRf(CaIR)[0.2/17] Ratio of pEWf to pEWspect.line.intensity;arith.ratiofloatJ/ApJS/220/20/table5Fit results of the SiII 6355 and CaII IR absorptions from Sample C (126 SNe)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNIAU SN Ia designationmeta.id;meta.maincharPhaseDays since the B-band maximum lightdtime.intervalfloatVSi6355[8500/15059] Velocity of the photospheric components of SiII 6355 absorptionkm/sspect.dopplerVelocintpEWSi6355[50/190] Pseudo-Equivalent width of the photospheric component of SiII 6355 absorption0.1nmspect.line.eqWidthintVCaIR[7799/15418] Velocity of the photospheric components of CaII IR tripletkm/sspect.dopplerVelocintpEWCaIR[33/230] Pseudo-Equivalent width of the photospheric components of CaII IR triplet0.1nmspect.line.eqWidthintVfCaIR[15806/34116] Velocity of the high-velocity feature components of CaII IR tripletkm/sspect.dopplerVelocintpEWfCaIR[0/196] Pseudo-Equivalent width of the high-velocity feature components of CaII IR triplet0.1nmspect.line.widthintRf(CaIR)[0/2.1] Ratio of pEWhvf to pEWphospect.line.intensity;arith.ratiofloat