J/ApJ/927/142ivo://CDS.VizieR/J/ApJ/927/142doi:10.26093/cds/vizier.19270142CDSLi Z.Zhang T.Wang X.Sai H.Zhang J.Chen J.Zhao X.Yan S.,Wang BoPhillips M.M.Hsiao E.Y.Morrell N.Contreras C.Burns C.R.,Ashall C.Stritzinger M.Krisciunas K.Prieto J.Zou HuWang J.,Ma J.Nie J.Xue S.Zhou XuZhou Z.Xiang D.Xi G.2025-02-12T20:08:59Z2024-02-05T09:42:26ZCDS support team

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

cds-question@unistra.frsupernovaevisible-astronomyspectroscopyinfrared-astronomyIn this paper, we present photometric and spectroscopic observations of the subluminous Type Ia supernova (SNIa) 2012ij, which has an absolute B-band peak magnitude M_B,max_=-17.95+/-0.15mag. The B-band light curve exhibits a fast postpeak decline with {Delta}m_15_(B)=1.86+/-0.05mag. All the R- and I/i-band light curves show a weak secondary peak/shoulder feature at about 3 weeks after the peak, like some transitional subclass of SNe Ia, which could result from an incomplete merger of near-infrared (NIR) double peaks. The spectra are characterized by TiII and strong SiII{lambda}5972 absorption features that are usually seen in low-luminosity objects like SN 1999by. The NIR spectrum before maximum light reveals weak carbon absorption features, implying the existence of unburned materials. We compare the observed properties of SN 2012ij with those predicted by the sub- Chandrasekhar-mass and the Chandrasekhar-mass delayed-detonation models and find that both optical and NIR spectral properties can be explained to some extent by these two models. By comparing the secondary maximum features in the I and i bands, we suggest that SN 2012ij is a transitional object linking normal SNe Ia to typical 91bg-like ones. From the published sample of SNe Ia from the Carnegie Supernova Project II, we estimate that the fraction of SN 2012ij-like SNe Ia is not lower than ~2%.2022ApJ...927..142Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/927/142CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/312 : PPMX Catalog of positions and proper motions (Roeser+ 2008)J/ApJ/645/488 : SN type Ia luminosities (Wang+, 2006)J/ApJ/659/122 : Improved distances to type Ia supernovae (Jha+, 2007)J/MNRAS/377/1531 : Optical & infrared phot. of SN 2004eo (Pastorello+, 2007)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/139/519 : Carnegie supernova project. SNe Ia (Contreras+, 2010)J/ApJS/190/418 : Light curves for 165 SNe (Ganeshalingam+, 2010)J/MNRAS/412/1441 : SNe luminosity functions (Li+, 2011)J/AJ/143/126 : Spectroscopy of 462 nearby Type Ia SNe (Blondin+, 2012)J/MNRAS/425/1789 : Berkeley supernova Ia program. I. (Silverman+, 2012)J/ApJ/773/53 : Type Ia SNe spectroscopy by the CSP (Folatelli+, 2013)J/other/Sci/340.170 : Classifications of 188 SNe Ia (Wang+, 2013)J/A+A/568/A22 : Joint analysis of the SDSS-II & SNLS SNe Ia (Betoule+, 2014)J/A+A/578/A9 : Optical and NIR spectra of SN iPTF13ebh (Hsiao+, 2015)J/ApJS/219/13 : SNe Ia light curves for the LSQ-CSP sample (Walker+, 2015)J/ApJS/220/20 : Si and Ca high-velocity features in SNe Ia (Zhao+, 2015)J/MNRAS/456/2848 : Properties of 500 SNe and their 419 hosts (Hakobyan+, 2016)J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)J/AJ/154/211 : The CSP (DR3): phot. of low-z SNe Ia (Krisciunas+, 2017)J/ApJ/869/56 : Updated calibration of the CSP-I SNeIa sample (Burns+, 2018)J/A+A/611/A58 : SN 2007on and SN 2011iv light curves (Gall+, 2018)J/ApJ/870/L1 : K2 obs. of type Ia supernova SN 2018oh (Dimitriadis+, 2019)J/A+A/630/A76 : SN2016hnk photometry and spectroscopy (Galbany+, 2019)J/MNRAS/485/2343 : r-band Type Ia supernovae (Papadogiannakis+, 2019)J/ApJ/870/13 : K2 LC alternative analysis of ASASSN-18bt (Shappee+, 2019)J/ApJ/914/57 : Follow-up Opt. & NIR obs. of SN2015bp (Wyatt+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/927/142https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/927/142http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/927/142https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/927/142https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/927/142http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/927/142GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/ApJ/927/142/table2Journal of Spectroscopic Observations of SN 2012ijrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observation (UT)time.epochnullableMJD[56297/56341.3] Modified Julian Datedtime.epochfloatPhase[-5.3/39] Phase relative to the epoch of the B-band maximum (MJD=56302.3) in the frame of the observertime.phasefloatlam1Wavelength lower range0.1nmem.wl;stat.minintlam2Wavelength upper rangeem.wl;stat.maxintResApproximate spectral resolution (FWHM intensity)0.1nmspect.resolutioncharInstInstrumentmeta.id;instrcharSpInteractive plot of spectrummeta.ref.urlcharJ/ApJ/927/142/fig7Optical spectral evolution of SN 2012ijrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhase[-5.3/39] Time since B-band maximumtime.phasefloatlambda[3287/9656] Observed wavelength; Angstroms0.1nmem.wldoubleFlux[-5e-16/5e-15] Observed flux; erg/s/cm^2^/AngstromscW.m**-2.nm**-1phot.fluxdoubleJ/ApJ/927/142/fig8NIR spectra of SN 2012ijrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPhase[-4/26] Time since B-band maximumtime.phasefloatlambda[7981/25817] Observed wavelength; Angstroms0.1nmem.wldoubleFlux[-8.7e-13/9.3e-12] Observed flux; erg/s/cm^2^/AngstromscW.m**-2.nm**-1phot.fluxdouble