J/MNRAS/465/739ivo://CDS.VizieR/J/MNRAS/465/739doi:10.26093/cds/vizier.74650739CDSShara M.M.Drissen L.Martin T.Alarie A.Stephenson F.R.2024-08-17T20:17:25Z2018-09-07T12:12:36ZCDS support team

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

cds-question@unistra.frnovaeradial-velocityinterstellar-mediumThe Z Cam-type dwarf nova AT Cancri (AT Cnc) displays a classical nova (CN) shell, demonstrating that mass transfer in cataclysmic binaries decreases substantially after a CN eruption. The hibernation scenario of cataclysmic binaries predicts such a decrease, on a time-scale of a few centuries. In order to measure the time since AT Cnc's last CN eruption, we have measured the radial velocities of a hundred clumps in its ejecta with SITELLE, Canada-France-Hawaii Telescope's recently commissioned imaging Fourier transform spectrometer. These range from -455 to +490km/s. Coupled with the known distance to AT Cnc of 460pc, the size of AT Cnc's shell, and a simple model of nova ejecta deceleration, we determine that the last CN eruption of this system occurred 330^+135^_-90_yr ago. This is the most rapid transition from a high mass-transfer rate, nova-like variable to a low mass-transfer rate, dwarf nova yet measured, and in accord with the hibernation scenario of cataclysmic binaries. We conclude by noting the similarity in the deduced outburst date (within a century of 1686 CE) of AT Cnc to a 'guest star' reported in the constellation Cancer by Korean observers in 1645 CE.2017MNRAS.465..739Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/465/739CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/564/A31 : SMC blob N26 multiband photometry (Testor+, 2014)J/ApJ/845/172 : LAE candidates around bright Ly{alpha} blobs (Badescu+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/465/739https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/465/739http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/465/739https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/465/739https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/465/739http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/465/739GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/465/739/table1 (Properties of blobs in AT Cnc)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/465/739/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/465/739/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/465/739/table1?GETtext/xml+votable180.050000true127.17237525.33627780.0055555555555555566/4828https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/465/739?format=asciidefaultJ/MNRAS/465/739/table1Properties of blobs in AT CncrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/115] Blob sequential numbermeta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainRVRadial velocitykm/sphys.veloc;pos.heliocentricinte_RVrms uncertainty on RVkm/sstat.errorintFluxFlux in the [NII] line1e-19W.m**-2phot.flux;spect.linefloat