Nikita Rawat
SWIFT J0503.7-2819: A nearly synchronous intermediate polar below the period gap?
Rawat, Nikita; Pandey, JC; Joshi, Arti; Scaringi, Simone; Yadava, Umesh
Authors
JC Pandey
Arti Joshi
Dr Simone Scaringi simone.scaringi@durham.ac.uk
Associate Professor
Umesh Yadava
Abstract
Based on the X-ray observations from XMM-Newton and Swift, and optical observations from Transiting Exoplanet Survey Satellite (TESS) and AAVSO, we present temporal and spectral properties of probable intermediate polar SWIFT J0503.7-2819. The X-ray light curve shows two distinctive features, where possibly the second pole seems to be active during the middle of the XMM-Newton observations. Present analysis confirms and also refines the previously reported orbital period of SWIFT J0503.7-2819 as 81.65±0.04 min. The X-ray and optical variations of this target have been found to occur at the period of ∼ 65 min, which we propose as the spin period of the white dwarf (WD). The energy-dependent modulation at this period, which are due to the photoelectric absorption in the accretion flow, also assures this conjecture. Two temperature thermal plasma model well explains the X-ray spectra with temperatures of ∼ 150 eV and ∼ 18.5 keV, which is absorbed by a dense material with an average equivalent hydrogen column density of 3.8 × 1022 cm−2 that partially covers ∼ 27% of the X-ray source. An attempt is made to understand the accretion flow in this system using the present data of SWIFT J0503.7-2819. If the proposed spin period is indeed the actual period, then SWIFT J0503.7-2819 could be the first nearly synchronous intermediate polar below the period gap.
Citation
Rawat, N., Pandey, J., Joshi, A., Scaringi, S., & Yadava, U. (2022). SWIFT J0503.7-2819: A nearly synchronous intermediate polar below the period gap?. Monthly Notices of the Royal Astronomical Society, 517(2), 1667-1677. https://doi.org/10.1093/mnras/stac2723
Journal Article Type | Article |
---|---|
Publication Date | 2022-12 |
Deposit Date | Oct 11, 2022 |
Publicly Available Date | Mar 31, 2023 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 517 |
Issue | 2 |
Pages | 1667-1677 |
DOI | https://doi.org/10.1093/mnras/stac2723 |
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Copyright Statement
This article has been accepted for publication in Monthly notices of the Royal Astronomical Society. ©: 2022 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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