UBVRI Photometry of the Solar Neighborhood Pleiades-Age K Dwarfs HD 17925 and HD 1405

Details UBVRI Photometry of the Solar Neighborhood Pleiades-Age K Dwarfs HD 17925 and HD 1405 UBVRI Photometry of the Solar Neighborhood Pleiades-Age K Dwarfs HD 17925 and HD 1405

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.2210a&link_type=abstract

American Astronomical Society, 186th AAS Meeting, #22.10; Bulletin of the American Astronomical Society, Vol. 27, p.842

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We report a photometric modulation period for the nearby (d=7.9 pc) Pleiades-age K2 dwarf HD 17925 of 6.9 d, in reasonable agreement with the Ca H+K modulation period of 6.6 d reported by Noyes etal \ in 1984. Perhaps not surprisingly for a star this young, the shape of the light curve changed significantly over a three week period. The three-month light curve for HD 1405 (K2 V; P=1.75 d) showed one flare (Delta U ~ 0.2) at photometric minimicrons. The UBVRI observations were obtained with the 0.8-m Four College Automated Photometric Telescope (APT) on Mt. Hopkins, AZ, during the Fall 1994 observing season.

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