J/MNRAS/431/2453ivo://CDS.VizieR/J/MNRAS/431/2453doi:10.26093/cds/vizier.74312453CDSMeunier C.Bauer F.E.Dwarkadas V.V.Koribalski B.Emonts B.,Hunstead R.W.Campbell-Wilson D.Stockdale C.Tingay S.J.2024-07-21T20:14:47Z2014-07-10T15:13:22ZCDS support team

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

cds-question@unistra.frsupernova-remnantsradio-sourcesWe present newly reduced archival radio observations of SN 1996cr in the Circinus Galaxy from the Australia Telescope Compact Array and the Molonglo Observatory Synthesis Telescope, and attempt to model its radio light curves using recent hydrodynamical simulations of the interaction between the supernova (SN) ejecta and the circumstellar material (CSM) at X-ray wavelengths. The radio data within the first 1000d show clear signs of free-free absorption (FFA), which decreases gradually and is minimal above 1.4GHz after day ~3000. Constraints on the FFA optical depth provide estimates of the CSM free electron density, which allows insight into the ionization of SN 1996cr's CSM and offers a test on the density distribution adopted by the hydrodynamical simulation. The intrinsic spectral index of the radiation shows evidence for spectral flattening, which is characterized by {alpha}=0.852+/-0.002 at day 3000 and a decay rate of {Delta}{alpha}=-0.014+/-0.001yr^-1^. The striking similarity in the spectral flattening of SN 1987A, SN 1993J and SN 1996cr suggests this may be a relatively common feature of SNe/CSM shocks. We adopt this spectral index variation to model the synchrotron radio emission of the shock, and consider several scalings that relate the parameters of the hydrodynamical simulation to the magnetic field and electron distribution. The simulated light curves match the large-scale features of the observed light curves, but fail to match certain tightly constraining sections. This suggests that simple energy density scalings may not be able to account for the complexities of the true physical processes at work, or alternatively, that the parameters of the simulation require modification in order to accurately represent the surroundings of SN 1996cr.2013MNRAS.431.2453Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/431/2453CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/431/2453https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/431/2453http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/431/2453https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/431/2453https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/431/2453http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/431/2453GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/431/2453/tablea1 (Flux densities of Calibrators)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/431/2453/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/431/2453/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/431/2453/tablea1?GETtext/xml+votable180.050000true203.1565-66.78050280.0055555555555555566/37246 38277 41059 41072 41310 41578 41607 41669 41687 41720 43366https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/431/2453?format=asciiRadiodefaultJ/MNRAS/431/2453/table1ATCA Radio observations (Australia Telescope Compact Array)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.DateStarting date of observationtime.start;obsnullableEp[1/14]? Epoch number whose data were combined, as described in Sec. 3.2.meta.idintnullableTime[-120/5791] Days from explosion datedtime.epochintObsIDObserving program IDmeta.id;meta.maincharArrayArray configurationphys.atmol.configuration;instr.setupcharFreq1[88632]? Observed W band mean frequency (3)MHzem.freq;stat.meanintnullableSint1? Integrated flux density in band W (1)mJyphot.flux.density;em.mm.50-100GHzfloatnullablee_Sint1? rms uncertainty on Sint1 (2)mJystat.errorfloatnullableFreq2[34496]? Observed Ka band mean frequency KaMHzem.freq;stat.meanintnullableSint2? Integrated flux density in band Ka (1)mJyphot.flux.density;em.mm.30-50GHzfloatnullablee_Sint2? rms uncertainty on Sint2 (2)mJystat.errorfloatnullableFreq3[16960/23659]? Observed K band mean frequencyMHzem.freq;stat.meanintnullableSint3? Integrated flux density in band K (1)mJyphot.flux.density;em.radiofloatnullablee_Sint3? rms uncertainty on Sint3 (2)mJystat.errorfloatnullableFreq4[6024/9000]? Observed X band mean frequencyMHzem.freq;stat.meanintnullablel_Sint4Limit flag on Sint4meta.code.errorcharSint4? Integrated flux density in band X (1)mJyphot.flux.density;em.radiofloatnullablee_Sint4? rms uncertainty on Sint4 (2)mJystat.errorfloatnullableFreq5[4786/5500]? Observed C band mean frequencyMHzem.freq;stat.meanintnullablel_Sint5Limit flag on Sint5meta.code.errorcharSint5? Integrated flux density in band C (1)mJyphot.flux.density;em.radio.3-6GHzfloatnullablee_Sint5? rms uncertainty on Sint5 (2)mJystat.errorfloatnullableFreq6[2100/2768]? Observed S band mean frequencyMHzem.freq;stat.meanintnullablel_Sint6Limit flag on Sint6meta.code.errorcharSint6? Integrated flux density in band S (1)mJyphot.flux.density;em.radiofloatnullablee_Sint6? rms uncertainty on Sint6 (2)mJystat.errorfloatnullableFreq7[1376/1664]? Observed L band mean frequencyMHzem.freq;stat.meanintnullablel_Sint7Limit flag on Sint7meta.code.errorcharSint7? Integrated flux density in band L (1)mJyphot.flux.density;em.radiofloatnullablee_Sint7? rms uncertainty on Sint7 (2)mJystat.errorfloatnullableFreq8[843]? Observed UHF band mean frequency (4)MHzem.freq;stat.meanintnullableSint8? Integrated flux density in band UHF (1)mJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_Sint8? rms uncertainty on Sint8 (2)mJystat.errorfloatnullableJ/MNRAS/431/2453/tablea1Flux densities of CalibratorsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.DateStarting date of observationtime.start;obsnullableObsIDObserving program IDmeta.id;meta.maincharFreq2[34496]? Observed K band mean frequencyMHzem.freq;stat.meanintnullableSint2? Integrated flux density in band Ka (1)mJyphot.flux.density;em.mm.30-50GHzfloatnullablee_Sint2? rms uncertainty on Sint2mJystat.errorfloatnullableFreq3[16960/23659]? Observed K band mean frequencyMHzem.freq;stat.meanintnullableSint3? Integrated flux density in band K (1)mJyphot.flux.density;em.radiofloatnullablee_Sint3? rms uncertainty on Sint3mJystat.errorfloatnullableFreq4[6024/9000]? Observed X band mean frequencyMHzem.freq;stat.meanintnullableSint4? Integrated flux density in band X (1)mJyphot.flux.density;em.radiofloatnullablee_Sint4? rms uncertainty on Sint4mJystat.errorfloatnullableFreq5[4786/5500]? Observed C band mean frequencyMHzem.freq;stat.meanintnullableSint5? Integrated flux density in band C (1)mJyphot.flux.density;em.radio.3-6GHzfloatnullablee_Sint5? rms uncertainty on Sint5mJystat.errorfloatnullableFreq6[2100/2496]? Observed S band mean frequencyMHzem.freq;stat.meanintnullableSint6? Integrated flux density in band S (1)mJyphot.flux.density;em.radiofloatnullablee_Sint6? rms uncertainty on Sint6mJystat.errorfloatnullableFreq7[1376/1664]? Observed L band mean frequencyMHzem.freq;stat.meanintnullableSint7? Integrated flux density in band L (1)mJyphot.flux.density;em.radiofloatnullablee_Sint7? rms uncertainty on Sint7mJystat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition from ATCA list of calibrators (http://www.narrabri.atnf.csiro.au/calibrators/c007/atcat.html) (right ascension part)degpos.eq.ra;meta.main_DEPosition from ATCA list of calibrators (http://www.narrabri.atnf.csiro.au/calibrators/c007/atcat.html) (declination part)degpos.eq.dec;meta.mainCalCalibratormeta.idcharJ/MNRAS/431/2453/tablea2Flux densities of the nucleusrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.DateStarting date of observationtime.start;obsnullableObsIDObserving program IDmeta.id;meta.maincharFreq1[88632]? Observed Wa band mean frequencyMHzem.freq;stat.meanintnullableSint1? Integrated flux density in band Wa (1)mJyphot.flux.density;em.mm.50-100GHzfloatnullablee_Sint1? rms uncertainty on Sint1mJystat.errorfloatnullableFreq2[34496]? Observed Ka band mean frequencyMHzem.freq;stat.meanintnullableSint2? Integrated flux density in band Ka (1)mJyphot.flux.density;em.mm.30-50GHzfloatnullablee_Sint2? rms uncertainty on Sint2mJystat.errorfloatnullableFreq3[16960/23659]? Observed K band mean frequencyMHzem.freq;stat.meanintnullableSint3? Integrated flux density in band K (1)mJyphot.flux.density;em.radiofloatnullablee_Sint3? rms uncertainty on Sint3mJystat.errorfloatnullableFreq4[6024/9000]? Observed X band mean frequencyMHzem.freq;stat.meanintnullableSint4? Integrated flux density in band X (1)mJyphot.flux.density;em.radiofloatnullablee_Sint4? rms uncertainty on Sint4mJystat.errorfloatnullableFreq5[4786/5500]? Observed C band mean frequencyMHzem.freq;stat.meanintnullableSint5? Integrated flux density in band C (1)mJyphot.flux.density;em.radio.3-6GHzfloatnullablee_Sint5? rms uncertainty on Sint5mJystat.errorfloatnullableFreq6[2100/2768]? Observed S band mean frequencyMHzem.freq;stat.meanintnullableSint6? Integrated flux density in band S (1)mJyphot.flux.density;em.radiofloatnullablee_Sint6? rms uncertainty on Sint6mJystat.errorfloatnullableFreq7[1376/1664]? Observed L band mean frequencyMHzem.freq;stat.meanintnullableSint7? Integrated flux density in band L (1)mJyphot.flux.density;em.radiofloatnullablee_Sint7? rms uncertainty on Sint7mJystat.errorfloatnullable