Abstract
The relationship between stellar soft X-ray emission and rotation has been examined using a sample of 157 lower main-sequence stars from various clusters and the field. The highest correlation between X-ray emission and rotation is found when the X-ray emission is normalized by the bolometric emission and the rotation by the Rossby number, the rotation period divided by the convective turnover time at the base of the convective zone. No statistically significant variation of the slope of the activity-rotation relation with B-V color is found for longer period stars. The early-to-mid F stars (B-V = 0.3-0.45) follow the general activity-rotation relation defined by later-type stars. 37 refs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
