Short-duration accretion states of Polars as seen in <i>TESS</i> and ZTF data-Reference-Cited by-同舟云学术

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

Published:2022-09-06 Issue:3 Volume:516 Page:3144-3158
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Duffy C¹²^ORCID,Ramsay G¹^ORCID,Wu Kinwah³^ORCID,Mason Paul A⁴⁵,Hakala P⁶,Steeghs D²⁷^ORCID,Wood M A⁸

Affiliation:

1. Armagh Observatory and Planetarium, College Hill , Armagh BT61 9DB, UK

2. Department of Physics, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, UK

3. Mullard Space Science Laboratory, University College London , Holmbury St Mary, Surrey RH5 6NT, UK

4. New Mexico State University , MSC 3DA, Las Cruces, NM 88003, USA

5. Picture Rocks Observatory , 1025 S. Solano Dr. Suite D., Las Cruces, NM 88001, USA

6. Finnish Centre for Astronomy with ESO (FINCA), University of Turku , Quantum, Turku FI-20014, Finland

7. OzGrav: The ARC Centre of Excellence for Gravitational Wave Discovery , Clayton VIC 3800, Australia

8. Department of Physics and Astronomy, Texas A&M University–Commerce , Commerce, TX 75428, USA

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.

Funder

NASA

National Science Foundation

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stac2482/45723925/stac2482.pdf

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