UBVRI Photometry of the Solar Neighborhood Pleiades-Age K Dwarfs HD 17925 and HD 1405
Abstract
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.
- Publication:
-
American Astronomical Society Meeting Abstracts #186
- Pub Date:
- March 1995
- Bibcode:
- 1995AAS...186.2210A