Indications of magnetic accretion in Swift J0826.2-7033

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 (~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$\times$10${}^{22}$ 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.

arXiv comment10 pages, 7 figures. Accepted for publication in A&A

References in corpus (25)

• On the Absorption of X-rays in the Interstellar Medium
• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• The XMM-Newton Optical/UV Monitor Telescope
• The Relation Between Optical Extinction and Hydrogen Column Density in the Galaxy
• The Evolution of Cataclysmic Variables as Revealed by their Donor Stars
• The 105 month Swift-BAT all-sky hard X-ray survey
• A simple test for periodic signals in red noise
• X-ray Emissions from Accreting White Dwarfs: a Review
• Anomalous ultraviolet line flux ratios in the cataclysmic variables 1RXSJ232953.9+062814, CE315, BZ UMa and EY Cyg observed with HST/STIS
• AE Aquarii: how CVs descend from supersoft binaries
• The Palermo Swift-BAT Hard X-ray Catalogue. II- Results after 39 months of sky survey
• On the late spectral types of cataclysmic variable secondaries
• Hard X-ray view on intermediate polars in the Gaia era
• Determining the mass of the accreting white dwarf in magnetic CVs using data
• Hard X-ray Cataclysmic Variables
• Measuring the masses of magnetic white dwarfs: A NuSTAR Legacy Survey
• GK Per and EX Hya: Intermediate polars with small magnetospheres
• X-ray Orbital Modulations in Intermediate Polars
• On the nature of the hard X-ray sources SWIFTJ1907.3-2050, IGRJ12123-5802 and IGRJ19552+0044
• Accurate classification of 29 objects detected in the 39 months Palermo Swift/BAT hard X-ray catalogue
• Classifying IGR J18007-4146 as an intermediate polar using XMM and NuSTAR
• Classifying IGR J15038-6021 as a magnetic CV with a massive white dwarf
• The C/N ratio from FUV spectroscopy as a constraint upon the past evolution of HS0218+3229

Cited by in corpus (1)

• Broad Observational Perspectives Achieved by the Accreting White Dwarf Sciences in the XMM-Newton and Chandra Eras