R Coronae Borealis and Delta Coronae Borealis in 1990

Details R Coronae Borealis and Delta Coronae Borealis in 1990 R Coronae Borealis and Delta Coronae Borealis in 1990

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103.1091f&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, Oct. 1991, p. 1091-1093. Research supported by NSE

Astronomy and Astrophysics

Astronomy

17

R Coronae Borealis Stars, Stellar Spectrophotometry, Chromosphere, Fourier Transformation, Light Curve, Stellar Activity, Ubv Spectra

Scientific paper

UBV photometry of R CrB and Delta CrB has been obtained through the APT Service on 71 nights in 1990. R CrB proved to be near-maximum-light during this time and showed its usual single period of 44.6 +/-0.6 days. Delta CrB, a chromospherically active star that was essentially constant in 1989, showed renewed variability in 1990 with an amplitude of about 0.04 mag in V and a period of 60.8 +/-1.7 days, similar to its behavior two years earlier.

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