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Dwarf nova-type cataclysmic variable stars are significant radio emitters

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Authors
Coppejans, D.
Kording, E.
Miller-Jones, James
Rupen, M.
Sivakoff, G.
Knigge, C.
Groot, P.
Woudt, P.
Waagen, E.
Templeton, M.
Date
2016
Type
Journal Article

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Coppejans, D. and Kording, E. and Miller-Jones, J. and Rupen, M. and Sivakoff, G. and Knigge, C. and Groot, P. et al. 2016. Dwarf nova-type cataclysmic variable stars are significant radio emitters. Monthly Notices of the Royal Astronomical Society. 463 (2): pp. 2229-2241.
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Monthly Notices of the Royal Astronomical Society
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Faculty of Science and Engineering
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Department of Physics and Astronomy
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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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Abstract

We present 8–12 GHz radio light curves of five dwarf nova (DN) type cataclysmic variable stars (CVs) in outburst (RX And, U Gem, and Z Cam), or superoutburst (SU UMa and YZ Cnc), increasing the number of radio-detected DN by a factor of 2. The observed radio emission was variable on time-scales of minutes to days, and we argue that it is likely to be synchrotron emission. This sample shows no correlation between the radio luminosity and optical luminosity, orbital period, CV class, or outburst type; however, higher cadence observations are necessary to test this, as the measured luminosity is dependent on the timing of the observations in these variable objects. The observations show that the previously detected radio emission from SS Cyg is not unique in type, luminosity (in the plateau phase of the outburst), or variability time-scales. Our results prove that DN, as a class, are radio emitters in outburst.