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
- Field-Weighted Citation Impact
- 0.00