Optical observations of 4U 1626-67

Details Optical observations of 4U 1626-67 Optical observations of 4U 1626-67

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.190p..33p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 190, Feb. 1980, p. 33P-39P.

Astronomy and Astrophysics

Astronomy

5

Binary Stars, Companion Stars, Stellar Spectrophotometry, Variable Stars, Light Curve, Sine Waves, Spectral Energy Distribution, Stellar Luminosity, Stellar Models, Stellar Spectra, X Ray Stars

Scientific paper

Light pulses were observed from the optical counterpart of 4U 1626-67. The period, period derivative, and phases of the pulses were derived. The light curve of the optical pulses is not a simple sinusoid. The small intrinsic luminosity, the pulse timing observations, and the spectrophotometry are all consistent with 4U 1626-67 being in a short period (Porb less than 0.3 day) binary system with a low mass (Mopt approximately equal to 0.2 Mo) optical companion in an orbit with small inclination not greater than 10 deg.

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