J/MNRAS/467/L31ivo://CDS.VizieR/J/MNRAS/467/L31doi:10.26093/cds/vizier.74679031CDSMooley K.P.Miller-jones J.C.A.Fender R.P.Sivakoff G.R.Rumsey C.,Perrott Y.Titterington D.Grainge K.Russell T.D.Carey S.H.,Hickish J.Razavi-ghods N.Scaife A.Scott P.Waagen E.O.2024-08-17T20:18:24Z2019-12-06T15:11:43ZCDS support team

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

cds-question@unistra.frnovaeradio-continuum-emissionx-ray-sourcesThe connection between accretion and jet production in accreting white dwarf binary systems, especially dwarf novae, is not well understood. Radio wavelengths provide key insights into the mechanisms responsible for accelerating electrons, including jets and outflows. Here, we present densely sampled radio coverage, obtained with the Arcminute MicroKelvin Imager Large Array, of the dwarf nova SS Cyg during its 2016 February anomalous outburst. The outburst displayed a slower rise (3d/mag) in the optical than typical ones and lasted for more than three weeks. Rapid radio flaring on time-scales <1h was seen throughout the outburst. The most intriguing behaviour in the radio was towards the end of the outburst where a fast, luminous ('giant'), flare peaking at ~20mJy and lasting for 15min was observed. This is the first time that such a flare has been observed in SS Cyg and insufficient coverage could explain its non-detection in previous outbursts. These data, together with past radio observations, are consistent with synchrotron emission from plasma ejection events as being the origin of the radio flares. However, the production of the giant flare during the declining accretion rate phase remains unexplained within the standard accretion-jet framework and appears to be markedly different to similar patterns of behaviour in X-ray binaries.2017MNRAS.467L..31Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/467/L31CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/467/L31https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/467/L31http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/467/L31https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/467/L31https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/467/L31http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/467/L31GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap1.0270407833977415e-23 1.0270407833977415e-23X-rayRadiodefaultJ/MNRAS/467/L31/table115.5GHz AMI-LA measurements of the SS CygrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDObservation datedtime.epochdoubleDurDurationmintime.durationfloatS15.5GHzFlux density at 15.5GHz (1)uJyphot.flux.density;em.radio.12-30GHzinte_S15.5GHzrms uncertainty on S15.5GHzuJystat.errorintalpha? Spectral slope between 16.8GHZ and 14.2GHz (2)arith.grad;instr.bandwidthfloatnullablee_alpha? rms uncertainty on alphastat.error;pos.eq.rafloatnullableJ/MNRAS/467/L31/table215.5GHz finely sampled measurements of the "giant" flarerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDObservation datedtime.epochdoubleDurDurationmintime.durationfloatS15.5GHzFlux density at 15.5GHz (1)uJyphot.flux.density;em.radio.12-30GHzinte_S15.5GHzrms uncertainty on S15.5GHzuJystat.errorintalpha? Spectral slope between 16.8GHZ and 14.2GHz (2)arith.grad;instr.bandwidthfloatnullablee_alpha? rms uncertainty on alphastat.error;pos.eq.rafloatnullable