A Survey for Radio Emission from White Dwarfs in the VLA Sky Survey
Ingrid Pelisoli, Laura Chomiuk, Jay Strader, T. R. Marsh, Elias Aydi,, Kristen C. Dage, Rebecca Kyer, Isabella Molina, Teresa Panurach, Ryan, Urquhart, Thomas J. Maccarone, R. Michael Rich, Antonio C. Rodriguez, E., Breedt, A. J. Brown, V. S. Dhillon, M. J. Dyer

TL;DR
This survey searched for radio emission from white dwarfs in the VLASS dataset, finding at most one candidate with emission likely associated with a binary system, indicating such emission is rare outside interacting binaries.
Contribution
The paper provides the first large-scale radio survey of white dwarfs using VLASS, establishing the rarity of strong radio emission from isolated white dwarfs.
Findings
Only one candidate white dwarf shows potential radio emission.
Most candidate associations are false positives or chance alignments.
Strong radio emission from white dwarfs outside binaries is extremely rare.
Abstract
Radio emission has been detected from tens of white dwarfs, in particular in accreting systems. Additionally, radio emission has been predicted as a possible outcome of a planetary system around a white dwarf. We searched for 3 GHz radio continuum emission in 846,000 candidate white dwarfs previously identified in Gaia using the Very Large Array Sky Survey (VLASS) Epoch 1 Quick Look Catalogue. We identified 13 candidate white dwarfs with a counterpart in VLASS within 2". Five of those were found not to be white dwarfs in follow-up or archival spectroscopy, whereas seven others were found to be chance alignments with a background source in higher-resolution optical or radio images. The remaining source, WDJ204259.71+152108.06, is found to be a white dwarf and M-dwarf binary with an orbital period of 4.1 days and long-term stochastic optical variability, as well as luminous radio and…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Astronomical Observations and Instrumentation · Radio Astronomy Observations and Technology
