Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..779p&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 689, p. 779-784.
Astronomy and Astrophysics
Astronomy
7
Cataclysmic Variables, Magnetic Stars, Stellar Oscillations, White Dwarf Stars, X Ray Sources, Charge Coupled Devices, Circular Polarization, Light Curve, Power Spectra, Stellar Rotation, Stellar Spectrophotometry
Scientific paper
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 spectroscopic 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.
Moulden Margaret
Patterson Joseph
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