Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243l..83p&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 243, Jan. 15, 1981, p. L83-L87.
Astronomy and Astrophysics
Astrophysics
71
Binary Stars, Pulsars, Stellar Oscillations, Variable Stars, White Dwarf Stars, X Ray Sources, Light Curve, Neutron Stars, Radial Velocity, X Ray Stars
Scientific paper
Photometric and spectroscopic observations of the optical counterpart of the X-ray source H2252-035 reveal the existence of stable periodicities of 3.59 hr and 14.31 min. Both radial velocity and photometric variations occur at the longer period, suggesting that it is the true orbital period of the underlying cataclysmic binary. The shorter period appears as a 10% modulation in the light curve, superposed on the 3.59 hr variation. The frequency is the lower orbital sideband of the X-ray pulsation frequency, suggesting that the optical pulses arise from reprocessing in the atmosphere of the secondary. Unlike the majority of X-ray pulsars, H2252-035 appears to contain a white dwarf rather than a neutron star.
Patterson Jaclyn
Price Mark C.
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