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Rapid Oscillations in Cataclysmic Variables. X. TW Pictoris (= H 0534-581)
Joseph Patterson and Margaret Moulden
Publications of the Astronomical Society of the Pacific
Vol. 105, No. 689 (1993 July), pp. 779-784
Published by: Astronomical Society of the Pacific
Stable URL: http://www.jstor.org/stable/40680106
Page Count: 6
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Photometry of the X-ray-selected cataclysmic variable TW Pictoris (= H 0534-581) reveals a periodic signal at P= 6.1 hr, which is approximately the orbital period of the binary. In addition, a highly probable signal is found at P=119.76 ± 0.09 min. Coupled with the high excitation, the high L x /L opt ratio, and the probable detection of a similar spectroscopie period, this makes it likely that the star belongs to the "DQ Herculis" class of cataclysmic variable— in which the stable short period is the spin period of an accreting magnetic white dwarf. Theory suggests that TW Pic is a particularly attractive candidate for showing circular polarization at visual or near-infrared wavelengths.
Publications of the Astronomical Society of the Pacific © 1993 The University of Chicago Press