R Coronae Borealis in the 1977 and 1983 visual minima. I - Photometry

Details R Coronae Borealis in the 1977 and 1983 visual minima. I - Photometry R Coronae Borealis in the 1977 and 1983 visual minima. I - Photometry

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986kfnt....2...29r&link_type=abstract

Kinematika i Fizika Nebesnykh Tel (ISSN 0233-7665), vol. 2, Sept.-Oct. 1986, p. 29-34. In Russian.

Physics

1

Corona Borealis Constellation, Light Curve, R Coronae Borealis Stars, Stellar Envelopes, Stellar Spectrophotometry, Ubv Spectra, Cosmic Dust, Emission Spectra, Graphite, Minima, Stellar Color

Scientific paper

Results of UBV photometry of R CrB in the 1977 and 1983 deep visual minima are presented, and contributions of emission lines to the B-V and U-B color variations during the minimum are estimated on the basis of spectral observations. It is found, from the relation between color variations and the brightness decrease rate for different minima, that graphite dust grains are larger in the minima with a great higher rate of brightness decrease.

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