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SWIFT J0503.7-2819: a nearly synchronous intermediate polar below the period gap?

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dc.contributor.author Rawat, Nikita
dc.contributor.author Pandey, J. C.
dc.contributor.author Joshi, Arti
dc.contributor.author Scaringi, Simone
dc.contributor.author Yadava, Umesh
dc.date.accessioned 2024-04-05T06:16:23Z
dc.date.available 2024-04-05T06:16:23Z
dc.date.issued 2022-12
dc.identifier.uri https://doi.org/10.1093/mnras/stac2723
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/1534
dc.description.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. 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 per cent 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. en_US
dc.language.iso en en_US
dc.publisher Monthly Notices of the Royal Astronomical Society en_US
dc.relation.ispartofseries 1929;mnras517-1667
dc.subject accretion, accretion discs en_US
dc.subject stars: individual: (SWIFT J0503.7-2819) en_US
dc.subject stars: magnetic field en_US
dc.subject cataclysmic variables en_US
dc.title SWIFT J0503.7-2819: a nearly synchronous intermediate polar below the period gap? en_US
dc.type Article en_US


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