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- W67147763 abstract "An analysis of an extensive collection of spectroscopic and photometricobservations of the interacting binary CX Dra led to the following mainconclusions:1. Both, spectroscopy and photometry indicate that the circumstellarenvironment changes in cycles of a few hundred days. The length of thecycles is variable.2. The long-term H-alpha emission and light changes of CX Dra havea very similar character. This may mean a common cause which drives bothspectroscopic and photometric long-term variations of the star.3. The equivalent width of the H-alpha difference profiles and thelight of CX Dra are modulated with the orbital period of 6d696. Thecorresponding phase diagrams indicate a great deal of scatter, but themodulation is quite conspicuous when long data strings are used. Thepattern of the phase diagram constructed for H-alpha differenceprofiles suggests a permanent presence of the emission.4. The radial velocities of the H-alpha emission peak follow aS-wave pattern. The resulting velocity (Doppler) map shows that thesource of the single-peaked emission lies close to the L_1 pointnear the secondary star." @default.
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- W67147763 date "1998-01-01" @default.
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- W67147763 title "Spectroscopy and photometry of the interacting binary CX Draconis - evidence for circumstellar matter" @default.
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