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

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.

arXiv commentMNRAS, accepted

References in corpus (22)

• The Gaia mission
• WSClean: an implementation of a fast, generic wide-field imager for radio astronomy
• The Catalina Surveys Periodic Variable Star Catalog
• Faceting for direction-dependent spectral deconvolution
• A radio pulsing white dwarf binary star
• A transient radio jet in an erupting dwarf nova
• Dwarf nova-type cataclysmic variable stars are significant radio emitters
• Polarized QPOs from the INTEGRAL polar IGRJ14536-5522 (=Swift J1453.4-5524)
• The reproducible radio outbursts of SS Cygni
• Synchrotron self absorption and the minimum energy of optically thick radio flares from stellar mass black holes
• Circular polarization survey of intermediate polars I. Northern targets in the range 17h<R.A.<23h
• V1460 Her: A fast spinning white dwarf accreting from an evolved donor star
• CTCV J2056-3014: An X-ray-faint Intermediate Polar Harboring An Extremely Fast-spinning White Dwarf
• A Jansky VLA Survey of Magnetic Cataclysmic Variable Stars: I. The Data
• The case for jets in cataclysmic variables
• Follow-up Studies of Five Cataclysmic Variable Candidates Discovered by LAMOST
• Towards the origin of the radio emission in AR Sco, the first radio-pulsing white dwarf binary
• A MeerKAT Survey of Nearby Novalike Cataclysmic Variables
• A Flare of AE Aquarii Observed with XMM-Newton
• Late-outburst radio flaring in SS Cyg and evidence for a powerful kinetic output channel in cataclysmic variables
• Spitzer Space Telescope Observations of the Magnetic Cataclysmic Variable AE Aqr
• Mass limits of the extremely fast-spinning white dwarf CTCV J2056-3014

Cited by in corpus (11)

• Found: a rapidly spinning white dwarf in LAMOST J024048.51+195226.9
• The Orbital Period vs. Absolute Magnitude Relationship of Intermediate Polars: Implications for Low States and Outbursts
• Confirmation of a Second Propeller: A High-Inclination Twin of AE~Aquarii
• Unveiling the white dwarf in J191213.72-441045.1 through ultraviolet observations
• Radio detections of two unusual cataclysmic variables in the VLA Sky Survey
• The MAVERIC survey: A catalogue of radio sources in southern globular clusters from the Australia Telescope Compact Array
• Searching for cataclysmic variable stars in unidentified X-ray sources
• VLA Observations of the AE Aqr-type Cataclysmic Variable LAMOST J024048.51+195226.9
• VLBI detection of the AE Aqr twin, LAMOST J024048.51+195226.9
• Exploration of faint X-ray and radio sources in the massive globular cluster M14: A UV-bright counterpart to Nova Ophiuchus 1938
• X-ray emission mechanisms in accreting white dwarfs