Photoelectric photometry of the RS CVn binary EI Eridani = HD 26337

Details Photoelectric photometry of the RS CVn binary EI Eridani = HD 26337 Photoelectric photometry of the RS CVn binary EI Eridani = HD 26337

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.155...45h&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 155, no. 1, May 1989, p. 45-51.

Astronomy and Astrophysics

Astrophysics

2

Binary Stars, Irregular Variable Stars, Stellar Spectrophotometry, Ubv Spectra, Light Curve, Starspots, Stellar Models

Scientific paper

Differential UBV(RI)sub KC and UBVRI photometry of the RS CVn binary EI Eridani obtained during December 1987 and January 1988 at fourteen different observatories is presented. A combined visual bandpass light curve, corrected for systematic errors of different observatories, utilizes the photometric period of 1,945 days to produce useful results. The analysis shows the visual light curve to have twin maxima, separated by about 0.4 phase, and a full amplitude of approximately 0.06 mag for the period of observation, a smaller amplitude than reported in the past. The decrease in amplitude may be due to a decrease or homogenization of spot coverage. To fit the asymmetrical light curve, a starspot model would have to employ at least two spotted regions separated in longitude.

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