The binary system of SS 433. I - Further constraints imposed by observations of the optical continuum spectrum

Details The binary system of SS 433. I - Further constraints imposed by observations of the optical continuum spectrum The binary system of SS 433. I - Further constraints imposed by observations of the optical continuum spectrum

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...308..152w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 308, Sept. 1, 1986, p. 152-160.

Astronomy and Astrophysics

Astronomy

34

Accretion Disks, Binary Stars, Continuous Spectra, Spectrophotometry, Stellar Spectra, Visible Spectrum, Black Body Radiation, Black Holes (Astronomy), Light Curve, Precession, Stellar Luminosity

Scientific paper

The author presents an analysis of the form of the optical continuum spectrum of SS 433 based on continuum-fitting a subset of spectrophotometric observations obtained during the two years 1982 - 1983. The dominant source of optical luminosity in SS 433 resembles a hot blackbody with a radius of ≡30 R_sun; and a mean color temperature of ≡32,500K. The continuum spectrum appears hotter when the more luminous precessing body is seen nearest pole-on and cooler when seen nearest equator-on. The temperature variation is large enough to account for the amplitude and form of the 164 day V-band light curve. Gravity-darkening of an early-type companion star or an accretion disk may provide the most likely interpretation of the color temperature variation.

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