A1 Refereed original research article in a scientific journal
Short-duration accretion states of Polars as seen in TESS and ZTF data
Authors: Duffy C, Ramsay G, Wu K, Mason PA, Hakala P, Steeghs D, Wood MA
Publisher: OXFORD UNIV PRESS
Publication year: 2022
Journal: Monthly Notices of the Royal Astronomical Society
Journal name in source: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Journal acronym: MON NOT R ASTRON SOC
Volume: 516
Issue: 3
First page : 3144
Last page: 3158
Number of pages: 15
ISSN: 0035-8711
eISSN: 1365-2966
DOI: https://doi.org/10.1093/mnras/stac2482
Web address : https://academic.oup.com/mnras/article/516/3/3144/6692883
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/176764400
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.
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