Photoelectric observations of Centaurus X-3

Details Photoelectric observations of Centaurus X-3 Photoelectric observations of Centaurus X-3

Jan 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...195l..27m&link_type=abstract

Astrophysical Journal, vol. 195, Jan. 1, 1975, pt. 2, p. L27-L30.

Astronomy and Astrophysics

Astrophysics

22

Eclipsing Binary Stars, Electrophotometry, Light Curve, Stellar Spectrophotometry, X Ray Sources, Emission Spectra, Mass Ratios, Neutron Stars, Radial Velocity, Stellar Mass, Ubv Spectra

Scientific paper

Photoelectric observations in the V band have yielded a light curve for the optical counterpart of Cen X-3. The amplitude of the light variations is 0.14 mag, which rules out the possibility of a very low mass ratio. It is shown that the X-ray source, which is believed to be a neutron star, must have a lower mass limit close to 3 solar masses. The photometric properties indicate a distance of about 7 kpc. Besides a double wave due to the tidal distortion of the star, the light variations also show some intrinsic activity on a time scale of fractions of a minute. A radial velocity variation with an amplitude of 60 km per sec is predicted.

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