J/ApJ/863/163ivo://CDS.VizieR/J/ApJ/863/163doi:10.26093/cds/vizier.18630163CDSNayana A. J.Chandra P.Ray A. K2019-09-18T12:27:47Z2019-09-18T12:38:47ZCDS support team

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

cds-question@unistra.frsupernovaeradio-continuum-emissionWe present radio observations and modeling of one of the nearest and brightest Type IIP supernova SN 2004dj exploded in the galaxy NGC2403 at a distance of ~3.5Mpc. Our observations span a wide frequency and temporal range of 0.24-43GHz and ~1d to 12yrs since the discovery. We model the radio light curves and spectra with the synchrotron emission. We estimate the mass-loss rate of the progenitor star to be dM/dt~1x10^-6^M_{sun}_/yr for a wind speed of 10km/s. We calculate the radio spectral indices using 1.06, 1.40, 5.00, and 8.46GHz flux density measurements at multiple epochs. We witness steepening in the spectral index values for an extended period predominantly at higher frequencies. We explain this as a signature of electron cooling happening at the supernova shock in the plateau phase of the supernova. We estimate the cooling timescales for inverse Compton cooling and synchrotron cooling and find that inverse Compton cooling is the dominant cooling process.2018ApJ...863..163Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/863/163CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/sn : Asiago Supernova Catalogue (Barbon et al., 1999-)J/A+AS/96/269 : Stellar Models from 0.8 to 120 Msolar (Schaller+, 1992)J/PASP/117/773 : Classif. of SN host galaxies. III (van den Bergh+, 2005)J/AJ/131/2245 : BATC photometry of SN2004dj (Zhang+, 2006)J/other/PZ/28.8 : SN 2004dj UBVRI light curves (Tsvetkov+, 2008)J/A+A/493/339 : XMM-Newton serendipitous Survey. V. (Watson+, 2009)J/MNRAS/395/1409 : Type II-P SN progenitor constraints (Smartt+, 2009)J/MNRAS/412/1419 : Nearby supernova rates (Leaman+, 2011)J/ApJ/759/107 : Core-collapse SNe and host galaxies (Kelly+, 2012)J/A+A/538/A120 : A unified supernova catalogue (Lennarz+, 2012)J/A+A/544/A81 : Supernovae and their hosts in the SDSS DR8 (Hakobyan+, 2012)J/ApJ/759/107 : Core-collapse SNe and host galaxies (Kelly+, 2012)J/MNRAS/436/774 : Core collapse supernovae (type Ibc) (Eldridge+, 2013)J/MNRAS/445/2440 : SN with associated Planck CMB temperatures (Yershov+, 2014)J/ApJ/791/105 : SNe progenitor masses distribution (Williams+, 2014)J/ApJ/795/142 : Photometric peculiar SNe Ia (Gonzalez-Gaitan+, 2014)J/ApJ/799/215 : 26 type II-Plateau supernovae parameters (Pejcha+, 2015)J/MNRAS/456/2848 : Properties of 500 SNe and their 419 hosts (Hakobyan+, 2016)J/MNRAS/481/566 : Properties of 333 SNe & their 269 hosts (Karapetyan+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/863/163https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/863/163http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/863/163https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/863/163https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/863/163http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/863/163GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/ApJ/863/163/table1Details of radio observations of SN2004djNamePhase Calibrator Namemeta.idcharl_FnuLimit flag on Fnumeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation date (UT)time.epoch;obsnullableAge[34.1/4190.3] Days since explosion assuming date of explosion as 2004 June 28.00 (UT)dtime.intervalfloatFreq[0.2/43.4] Frequency of observationGHzem.freq;obsfloatFnu[0.1/10.5] Supernova fluxmJyphot.flux.density;em.radiofloate_Fnu[0.04/0.6]? Uncertainty in Supernova fluxmJystat.errorfloatnullabler_FnuSource for Fnu if not this work (1)meta.ref;pos.framecharRMS[0.03/4] RMS noisemJy/beaminstr.det.noisefloatcFnu[0.1/9.8]? Calibration fluxJyphot.flux.density;em.radio;obs.calibfloatnullableTelTelescope/Instrument used (VLA, GMRT or MERLIN)instr.setupchar