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IPHAS J062746.41+014811.3: A deeply eclipsing intermediate polar
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Aungwerojwit, A. (Amornrat), Gänsicke, B. T. (Boris T.), Wheatley, P. J., Pyrzas, S., Staels, B., Krajci, T. and Rodríguez-Gil, P. (2012) IPHAS J062746.41+014811.3: A deeply eclipsing intermediate polar. The Astrophysical Journal, Vol. 758 (No. 2). p. 79. doi:10.1088/0004-637X/758/2/79 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1088/0004-637X/758/2/79
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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | The Astrophysical Journal | ||||
| Publisher: | Institute of Physics Publishing Ltd. | ||||
| ISSN: | 0004-637X | ||||
| Official Date: | 2012 | ||||
| Dates: |
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| Volume: | Vol. 758 | ||||
| Number: | No. 2 | ||||
| Page Range: | p. 79 | ||||
| DOI: | 10.1088/0004-637X/758/2/79 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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