Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.225...93v&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 225, March 1, 1987, p. 93-111.
Astronomy and Astrophysics
Astronomy
41
Binary Stars, Dwarf Novae, Stellar Color, Stellar Spectrophotometry, Ubv Spectra, Ephemerides, Iue, Light Curve, Spectral Energy Distribution
Scientific paper
Five-color Walraven photometric observations of VW Hyi were obtained between July and November 1984. Significant orbital variations in the V-B, B-U, and B-L colors are detected which are mainly connected with the presence of an orbital hump. No evidence is found for a secular variation between outbursts in either the average flux or the orbital maximum and minimum fluxes, and little evidence is found for a secular trend in the shape of the orbital light curves between outbursts. The flux ratio across the Balmer jump is shown to change during a quiescence interval between outbursts, and results suggest a secular change in the shape of the B-U and U-W orbital color curves through quiescence. The onset of normal outbursts is found to be progressively delayed towards shorter wavelengths, in agreement with IUE observations.
Damen Eugene
Groot M.
Kraakman H.
Paradijs Jan van
van Amerongen S.
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