Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26as...32...57w&link_type=abstract
Astronomy and Astrophysics Supplement Series, vol. 32, Apr. 1978, p. 57-67. Research supported by the Deutsche Forschungsgemein
Astronomy and Astrophysics
Astrophysics
10
Algol, Astronomical Photometry, Eclipsing Binary Stars, Variable Stars, Astronomical Catalogs, Electrophotometers, Gas Streams, Light Curve
Scientific paper
The reported study includes photoelectric observations of TW Dra with a 40-cm reflector from observatories in Sicily and in West Germany. The total number of observations include 422 observations on 147 nights in yellow and 381 observations on 141 nights in blue. The study had the objective to obtain information for an investigation of certain open questions regarding the Algol systems. Because of the presence of a gas stream, the rectification was performed as a short region rectification. In the obtained photometric solution, the systematic trends of the residuals between observed and computed intensities are found to be even larger than the corresponding trends in the early solutions reported by Baglow (1952) and Horak (1966). These residuals can now be interpreted on the basis of the presence of a gas stream which transfers matter from the subgiant onto the bright massive component, where in the regions of impact of the particles hot spots are produced.
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