J/ApJ/938/L22ivo://CDS.VizieR/J/ApJ/938/L22doi:10.26093/cds/vizier.19389022CDSDutta A.Anupama G.C.Chakradhari N.K.Sahu D.K.2025-03-18T20:07:37Z2024-10-24T08:26:42ZCDS support team

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

cds-question@unistra.frsupernovaeultraviolet-photometryvisible-astronomyspectroscopyWe present optical observations and Monte Carlo radiative transfer modeling of the Type Ia supernova (SN Ia) SN 2011aa. With a {Delta}m_15_(B) of 0.59+/-0.07mag and a peak magnitude M_B_ of -19.30+/-0.27mag, SN 2011aa has the slowest decline rate among SNe Ia. The secondary maximum in the I band is absent or as equally bright as the primary maximum. The velocity of CII is lower than the velocity of SiII. This indicates either the presence of C at lower velocities than Si or a line-of-sight effect. Application of Arnett's radiation diffusion model to the bolometric light curve indicates a massive ejecta M_ej_ 1.8-2.6M_{sun}_. The slow decline rate and large ejecta mass, with a normal peak magnitude, are well explained by a double degenerate, violent merger explosion model. The synthetic spectra and light curves generated with SEDONA considering a violent merger density profile match the observations.2022ApJ...938L..22Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/938/L22CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-)J/AJ/137/4517 : UVOT light curves of supernovae (Brown+, 2009)J/ApJ/699/L139 : Spectral parameters of SNe Ia (Wang+, 2009)J/ApJ/748/L29 : SN Ia supernovae observed by Swift/XRT (Russell+, 2012)J/MNRAS/445/2440 : SN with associated Planck CMB temperatures (Yershov+, 2014)J/ApJ/787/29 : UVOT phot. of Super-Chandrasekhar mass SNe Ia (Brown+, 2014)J/ApJ/795/142 : Defining photometric peculiar SNe Ia (Gonzalez-Gaitan+, 2014)J/ApJS/220/9 : CfAIR2: NIR light curves of Type Ia SNe (Friedman+, 2015)J/ApJ/923/197 : SNIa observed in H-band with UV-opt. LCs (Ponder+, 2021)J/ApJ/925/217 : Optical phot. and sp. monitoring of SN 2020sck (Dutta+, 2022)J/other/PASA/39.46 : Pantheon+ SN Ia redshift and PV Data (Carr+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/938/L22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/938/L22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/938/L22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/938/L22https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/938/L22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/938/L22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapAssociated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/ApJ/938/L22UVOpticaldefaultJ/ApJ/938/L22/fig1Swift-UVOT and HCT-UBVRI magnitudes of SN 2011aarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date of observationdtime.epochdoublePhase[-10.2/127] Phase (1)dtime.phasefloatFiltFiltermeta.id;instr.filtercharomag[14.1/19.4] Observed magnitude in Filtmagphot.magfloate_omag[0.004/0.3] Uncertainty in omagmagstat.error;phot.magfloatJ/ApJ/938/L22/listList of the spectra (Data behind Figure 2)spInteractive spectrum plotmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFileNameName of the FITS file in subdirectory "sp"meta.id;meta.fitscharJDJulian date of the observationdtime.epochdoublePhase[-10.16/68.64] Phase; in the rest frame since the B-band maximum (JD=2455611.65)dtime.phasefloatfitsDownload the FITS filemeta.ref.urlchar