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Discovery of a Magnetic White Dwarf with Unusual Short-period Variability

Scholz, Aleks, Llama, Joe, Muzic, Koraljka, Faller, Sarah, Froebrich, Dirk, Stelzer, Beate (2018) Discovery of a Magnetic White Dwarf with Unusual Short-period Variability. Research Notes of the American Astronomical Society, 2 (1). Article Number 27. ISSN 2515-5172. (doi:10.3847/2515-5172/aaadbf) (KAR id:66560)

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https://doi.org/10.3847/2515-5172/aaadbf

Abstract

We report the discovery of a magnetic white dwarf which shows periodic variability with P = 110 min, colordependent amplitudes and a transient phase shift in the blue compared to the red lightcurve – a previously unknown type of variability for this type of object. We attribute the variations either to a close ultracool (thus far undetected) companion or, more likely, to magnetic spots with unusual temperature structure.

Item Type: Article
DOI/Identification number: 10.3847/2515-5172/aaadbf
Uncontrolled keywords: (stars:) white dwarfs — (stars:) starspots — stars: magnetic field – stars: peculiar
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Dirk Froebrich
Date Deposited: 27 Mar 2018 16:07 UTC
Last Modified: 03 Sep 2021 14:00 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/66560 (The current URI for this page, for reference purposes)
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