IPHAS J062746.41+014811.3: a deeply eclipsing intermediate polar

Abstract

We present time-resolved photometry of a cataclysmic variable discovered in the Isaac Newton Telescope Photometric Halpha Survey of the northern galactic plane, IPHAS J062746.41+014811.3 and classify the system as the fourth deeply eclipsing intermediate polar known with an orbital period of Porb=8.16 h, and spin period of Pspin=2210 s. The system shows mild variations of its brightness, that appear to be accompanied by a change in the amplitude of the spin modulation at optical wavelengths, and a change in the morphology of the eclipse profile. The inferred magnetic moment of the white dwarf is mu_wd = 6-7 x 10^33 Gcm^3, and in this case IPHAS J0627 will either evolve into a short-period EX Hya-like intermediate polar with a large Pspin\Porb ratio, or, perhaps more likely, into a synchronised polar. Swift observations show that the system is an ultraviolet and X-ray source, with a hard X-ray spectrum that is consistent with those seen in other intermediate polars. The ultraviolet light curve shows orbital modulation and an eclipse, while the low signal-to-noise ratio X-ray light curve does not show a significant modulation on the spin period. The measured X-ray flux is about an order of magnitude lower than would be expected from scaling by the optical fluxes of well-known X-ray selected intermediate polars.

34 pages, 9 figures, accepted for publication in ApJ

References in corpus (22)

• The Evolution of Cataclysmic Variables as Revealed by their Donor Stars
• The Donor Stars of Cataclysmic Variables
• Post-common-envelope binaries from SDSS. XI: The white dwarf mass distributions of CVs and pre-CVs
• On the evolutionary status of short period cataclysmic variables
• Initial Data Release from the INT Photometric H-alpha Survey of the Northern Galactic Plane (IPHAS)
• The Accretion Flows and Evolution of Magnetic Cataclysmic Variables
• Intermediate polars in the Swift/BAT survey: Spectra and white dwarf masses
• Characterization of new hard X-ray Cataclysmic Variables
• INTEGRAL/IBIS and Swift/XRT observations of hard cataclysmic variables
• VLT/FORS spectroscopy of faint cataclysmic variables discovered by the Sloan Digital Sky Survey
• HS2237+8154: On the onset of mass transfer or entering the period gap?
• Two new Intermediate Polars with a soft X-ray component
• Time-resolved optical observations of five cataclysmic variables detected by INTEGRAL
• The defining characteristics of Intermediate Polars - the case of three candidate systems
• Newly Discovered Cataclysmic Variables from the INT/WFC Photometric H alpha Survey of the Northern Galactic Plane
• RXTE determination of the intermediate polar status of XSS J00564+4548, IGR J17195-4100, and XSS J12270-4859
• SDSS J233325.92+152222.1 and the evolution of intermediate polars
• HS1857+5144: A hot and young pre-cataclysmic variable
• IGR J00234+6141 : a new INTEGRAL source identified as an Intermediate polar
• RXTE confirmation of the Intermediate Polar status of Swift J0732.5-1331
• The Intermediate Polar EI UMa: A Pre-Polar Cataclysmic Variable
• Characterizing Three Candidate Magnetic CVs from SDSS: XMM-Newton and Optical Follow-up Observations

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• The Second Data Release of the INT Photometric H-Alpha Survey of the Northern Galactic Plane (IPHAS DR2)
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• CXOGBS J174954.5-294335: A New Deeply-Eclipsing Intermediate Polar
• The Magnetospheric Boundary in Cataclysmic Variables
• A Step towards Unveiling the Nature of Three Cataclysmic Variables: LS Cam, V902 Mon, and SWIFT J0746.3-1608
• V902 Monocerotis: a likely disc-accreting intermediate polar
• Swift J201424.9+152930: discovery of a new deeply eclipsing binary with 491 s and 3.4 h modulations
• Discovery of deep eclipses in the cataclysmic variable IPHAS J051814.33+294113.0
• J1832.4-1627, the first eclipsing stream-fed intermediate polar
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• HP Cet and Swift J0820.6-2805: two candidate intermediate polars observed by XMM-Newton
• Discovery of deep eclipses in the cataclysmic variable IPHAS J013031.89+622132.3