UBVRI observations of active stars (Cutispoto, 1997)

Details UBVRI observations of active stars (Cutispoto, 1997) UBVRI observations of active stars (Cutispoto, 1997)

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat..41210369c&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/121/369. Originally published in: 1997A&AS..121..369C

Physics

Stars: Variable, Photometry: Ubvri, Photometry: Cousins

Scientific paper

In the framework of an extensive program focusing on the global properties and evolution of active stars, high-precision UBV(RI)c photometry of 9 selected stars, collected at the European Southern Observatory over the intervals 7-17 September and 30 September - 10 October 1990, is presented. Significant evolution of the light curves, period variations and evidence for long-term variability of the global degree of spottedness are found. Some of the spectral classifications are discussed. These observations contribute to the establishment of a time-extended photometric database which can give important clues on topics such as the stability of the spotted areas, differential rotation, solar-like cycles and the correlation between inhomogeneities at different atmospheric levels. For a description of the UBV and (RI)c photometric systems, see e.g. General Catalog of Photometric Data and
(3 data files).

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