Chromospheric Activity in Agol Binaries
Annual rept. 1 Oct 1992-30 Sep 1993
VIRGINIA UNIV CHARLOTTESVILLE DEPT OF ASTRONOMY
Pagination or Media Count:
The PI continued her study of magnetic activity on the cool components in short-period Algol-type binaries. The rapid rotators typically display enhanced magnetic activity, variations in the brightness of the cool secondary, and changes in the orbital period of the binary which can be linked to changes in the polarity of the magnetic field of the cool star. The PI has compiled observational evidence of magnetic activity in 15 Algol binaries and found that there is a 12 ck of information on the cool stars in these binaries. The systems chosen had orbital periods typically less than 6 days since short- period rapid rotators are more likely to display magnetic activity than their long-period counterparts. The survey showed that although six of the chosen boundaries displayed evidence of variations in the brightness of the secondary, Persei is the only Algol binary for which there was strong evidence of starspot activity.
- Electricity and Magnetism