New photometry for the rapidly rotating Pleiades K dwarf H II 1883

Details New photometry for the rapidly rotating Pleiades K dwarf H II 1883 New photometry for the rapidly rotating Pleiades K dwarf H II 1883

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....91.1443s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 91, June 1986, p. 1443-1450.

Astronomy and Astrophysics

Astronomy

17

Dwarf Stars, K Stars, Light Curve, Pleiades Cluster, Stellar Rotation, Stellar Spectrophotometry, Stellar Temperature, H Alpha Line, Radial Velocity

Scientific paper

Optical light curves are presented for the rapidly rotating spotted Pleiades K dwarf H II 1883 during January 1983-November 1985. The November 1985 data exhibit a dramatic change in the spot characteristics of the dwarf; the present BVRIJHK photometry allows an estimate of the size and temperature of the spot group or groups responsible for the photometric variability observed during 1983 and 1984 to be made. On the basis of a simple two-spot model, a spot temperature 900 K cooler than the mean photospheric temperature is derived, together with a spot area that is about 8 percent of the total surface area of the star.

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