Narrow-band photometry and differential effects in close binary systems

Details Narrow-band photometry and differential effects in close binary systems Narrow-band photometry and differential effects in close binary systems

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..67..477b&link_type=abstract

Astrophysics and Space Science, vol. 67, no. 2, Feb. 1980, p. 477-493. Research supported by the Ministry of Higher Education o

Astronomy and Astrophysics

Astrophysics

6

Absorption Spectra, Astronomical Photometry, Eclipsing Binary Stars, Stellar Models, Doppler Effect, Emission Spectra, Stellar Atmospheres

Scientific paper

The application of narrow-band photometry to close binary systems is considered, with particular attention to the effects of eclipses. Models are examined, in which two normal absorption spectra are superposed and in which a third emission component is present. The purpose of these models is to relate to narrow-band observations of a kind similar to some preliminary results presented for U Sge in H-beta. It is shown that, under the conditions obtaining for such observations, the role of Doppler effects should be small, but that the observations should be sensitive to any difference between the limb darkening in the line and surrounding continuum. In the three-component models, the emitting volume is pictured as (1) a chromospheric shell and (2) an equational disk about the primary star. The expected modifications corresponding to such models of observations of primary eclipse are calculated. The possible applicability of the models to the preliminary observations is briefly considered.

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