Indications of magnetic accretion in Swift J0826.2-7033

We present our findings from the first long X-ray observation of the hard X-ray source Swift J0826.2-7033 with XMM-Newton which has shown characteristics of magnetic accretion. The system appears to have a long orbital period (sim 7.8 h) accompanied by short timescale variabilities, which we tentatively interpret as the spin and beat periods of an intermediate polar. These short- and long-timescale modulations are energy-independent, suggesting that photoelectric absorption does not play any role in producing the variabilities. If our suspected spin and beat periods are true, then Swift J0826.2-7033 accretes via disc-overflow with an equal fraction of accretion taking place via disc and stream. The XMM-Newton and Swift -BAT spectral analysis reveals that the post-shock region in Swift J0826.2-7033 has a multi-temperature structure with a maximum temperature of sim 43 keV, which is absorbed by a material with an average equivalent hydrogen column density of sim 1.6$ $ cm$^ $ that partially covers sim 27<!PCT!> of the X-ray source. The suprasolar abundances, with hints of an evolved donor, collectively make Swift J0826.2-7033 an interesting target, which likely underwent a thermal timescale mass transfer phase.

Publication Details

Journal
Springer Link (Chiba Institute of Technology)
Published
2024-10-04
DOI
https://doi.org/10.1051/0004-6361/202450498/pdf
Primary Topic
Astrophysical Phenomena and Observations
Type
article
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article

Indications of magnetic accretion in Swift J0826.2-7033

Springer Link (Chiba Institute of Technology)
Astrophysical Phenomena and Observations
article

Indications of magnetic accretion in Swift J0826.2-7033

article en

Abstract

We present our findings from the first long X-ray observation of the hard X-ray source Swift J0826.2-7033 with XMM-Newton which has shown characteristics of magnetic accretion. The system appears to have a long orbital period (sim 7.8 h) accompanied by short timescale variabilities, which we tentatively interpret as the spin and beat periods of an intermediate polar. These short- and long-timescale modulations are energy-independent, suggesting that photoelectric absorption does not play any role in producing the variabilities. If our suspected spin and beat periods are true, then Swift J0826.2-7033 accretes via disc-overflow with an equal fraction of accretion taking place via disc and stream. The XMM-Newton and Swift -BAT spectral analysis reveals that the post-shock region in Swift J0826.2-7033 has a multi-temperature structure with a maximum temperature of sim 43 keV, which is absorbed by a material with an average equivalent hydrogen column density of sim 1.6$ $ cm$^ $ that partially covers sim 27<!PCT!> of the X-ray source. The suprasolar abundances, with hints of an evolved donor, collectively make Swift J0826.2-7033 an interesting target, which likely underwent a thermal timescale mass transfer phase.

Springer Link (Chiba Institute of Technology)
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Indications of magnetic accretion in Swift J0826.2-7033 · Springer Link (Chiba Institute of Technology) (2024) | TGRS Research Map | TGRS