English

Dwarf nova-type cataclysmic variable stars are significant radio emitters

Solar and Stellar Astrophysics 2016-08-31 v1 High Energy Astrophysical Phenomena

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 two. 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.

Keywords

Cite

@article{arxiv.1608.06295,
  title  = {Dwarf nova-type cataclysmic variable stars are significant radio emitters},
  author = {Deanne L. Coppejans and Elmar G. Koerding and James C. A. Miller-Jones and Michael P. Rupen and Gregory R. Sivakoff and Christian Knigge and Paul J. Groot and Patrick A. Woudt and Elizabeth O. Waagen and Matthew Templeton},
  journal= {arXiv preprint arXiv:1608.06295},
  year   = {2016}
}

Comments

Accepted to MNRAS. 14 pages, 6 figures

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