Radio and optical observations of the possible AE Aqr twin, LAMOST J024048.51+195226.9. (arXiv:2102.08800v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Pretorius_M/0/1/0/all/0/1">M. L. Pretorius</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hewitt_D/0/1/0/all/0/1">D. M. Hewitt</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Woudt_P/0/1/0/all/0/1">P. A. Woudt</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Fender_R/0/1/0/all/0/1">R. P. Fender</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Heywood_I/0/1/0/all/0/1">I. Heywood</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Knigge_C/0/1/0/all/0/1">C. Knigge</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Miller_Jones_J/0/1/0/all/0/1">J. C. A. Miller-Jones</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Buckley_D/0/1/0/all/0/1">D. A. H. Buckley</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Worters_H/0/1/0/all/0/1">H. L. Worters</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Potter_S/0/1/0/all/0/1">S. B. Potter</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Williams_D/0/1/0/all/0/1">D. R. A. Williams</a>
Thorstensen (2020) recently argued that the cataclysmic variable (CV) LAMOST
J024048.51+195226.9 may be a twin to the unique magnetic propeller system AE
Aqr. If this is the case, two predictions are that it should display a short
period white dwarf spin modulation, and that it should be a bright radio
source. We obtained follow-up optical and radio observations of this CV, in
order to see if this holds true. Our optical high-speed photometry does not
reveal a white dwarf spin signal, but lacks the sensitivity to detect a
modulation similar to the 33-s spin signal seen in AE Aqr. We detect the source
in the radio, and measure a radio luminosity similar to that of AE Aqr and
close to the highest so far reported for a CV. We also find good evidence for
radio variability on a time scale of tens of minutes. Optical polarimetric
observations produce no detection of linear or circular polarization. While we
are not able to provide compelling evidence, our observations are all
consistent with this object being a propeller system.
Thorstensen (2020) recently argued that the cataclysmic variable (CV) LAMOST
J024048.51+195226.9 may be a twin to the unique magnetic propeller system AE
Aqr. If this is the case, two predictions are that it should display a short
period white dwarf spin modulation, and that it should be a bright radio
source. We obtained follow-up optical and radio observations of this CV, in
order to see if this holds true. Our optical high-speed photometry does not
reveal a white dwarf spin signal, but lacks the sensitivity to detect a
modulation similar to the 33-s spin signal seen in AE Aqr. We detect the source
in the radio, and measure a radio luminosity similar to that of AE Aqr and
close to the highest so far reported for a CV. We also find good evidence for
radio variability on a time scale of tens of minutes. Optical polarimetric
observations produce no detection of linear or circular polarization. While we
are not able to provide compelling evidence, our observations are all
consistent with this object being a propeller system.
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