SIMBAD references

2024A&A...691A.264R - Astronomy and Astrophysics, volume 691A264 (2024/11-1)

Indications of magnetic accretion in Swift J0826.2-7033.

RAWAT N., DE MARTINO D., MUKAI K., FALANGA M., MASETTI N. and PANDEY J.C.

Abstract (from CDS):

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 (∼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 ∼43 keV, which is absorbed by a material with an average equivalent hydrogen column density of ∼1.6 × 1022 cm–2 that partially covers ∼27% 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.

Abstract Copyright: © ESO 2024

Journal keyword(s): accretion, accretion disks - novae - cataclysmic variables - stars: individual: Swift J0826.2-7033 - stars: individual: 1RXS J082623.5-703142 - stars: individual: PBC J0826.3-7033 - X-rays: stars

Simbad objects: 8

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