Published in

Oxford University Press, Monthly Notices of the Royal Astronomical Society, 3(516), p. 3144-3158, 2022

DOI: 10.1093/mnras/stac2482

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Short-duration accretion states of Polars as seen in TESS and ZTF data

Journal article published in 2022 by C. Duffy ORCID, G. Ramsay ORCID, Kinwah Wu ORCID, Paul A. Mason, P. Hakala, D. Steeghs ORCID, M. A. Wood
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Data provided by SHERPA/RoMEO

Abstract

ABSTRACT Polars are highly magnetic cataclysmic variables which have been long observed to have both high and low brightness states. The duration of these states has been previously seen to vary from a number of days up to years. Despite this, these states and their physical origin have not been explained in a consistent manner. We present observations of the shortest duration states of a number of Polars observed by ZTF and TESS. This has allowed us to determine that short-duration states are a relatively common feature across the population of Polars. Furthermore, we have been able to generalize the model of star-spot migration to explain both short-lived high and low states in Polars by incorporating the interaction between the magnetic field of the white dwarf and that of the star spots.