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Radio and optical observations of the possible AE Aqr twin, LAMOST J024048.51+195226.9

Radio and optical observations of the possible AE Aqr twin, LAMOST J024048.51+195226.9
Radio and optical observations of the possible AE Aqr twin, LAMOST J024048.51+195226.9
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.
astro-ph.SR
1-6
Pretorius, M. L.
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Hewitt, D. M.
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Woudt, P. A.
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Fender, R. P.
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Heywood, I.
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Knigge, C.
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Miller-Jones, J. C. A.
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Buckley, D. A. H.
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Worters, H. L.
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Potter, S. B.
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Williams, D. R. A.
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Pretorius, M. L.
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Hewitt, D. M.
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Woudt, P. A.
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Fender, R. P.
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Heywood, I.
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Knigge, C.
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Miller-Jones, J. C. A.
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Buckley, D. A. H.
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Worters, H. L.
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Potter, S. B.
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Williams, D. R. A.
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Pretorius, M. L., Hewitt, D. M., Woudt, P. A., Fender, R. P., Heywood, I., Knigge, C., Miller-Jones, J. C. A., Buckley, D. A. H., Worters, H. L., Potter, S. B. and Williams, D. R. A. (2021) Radio and optical observations of the possible AE Aqr twin, LAMOST J024048.51+195226.9. Monthly Notice of the Royal Astronomical Society, 1-6. (doi:10.1093/mnras/stab498).

Record type: Article

Abstract

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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2102.08800v1 - Accepted Manuscript
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Accepted/In Press date: 17 February 2021
e-pub ahead of print date: 20 February 2021
Additional Information: MNRAS, accepted
Keywords: astro-ph.SR

Identifiers

Local EPrints ID: 447371
URI: http://eprints.soton.ac.uk/id/eprint/447371
PURE UUID: 4d3b2981-3fc8-4567-ac79-16c33d5d6686
ORCID for D. R. A. Williams: ORCID iD orcid.org/0000-0001-7361-0246

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Date deposited: 10 Mar 2021 17:37
Last modified: 27 Aug 2021 16:31

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Contributors

Author: M. L. Pretorius
Author: D. M. Hewitt
Author: P. A. Woudt
Author: R. P. Fender
Author: I. Heywood
Author: C. Knigge
Author: J. C. A. Miller-Jones
Author: D. A. H. Buckley
Author: H. L. Worters
Author: S. B. Potter
Author: D. R. A. Williams ORCID iD

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