| |
 |
| Paper: |
On the Rotation-Activity Correlation in Active Binaries |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
1257 |
| Authors: |
Gunn, A. G.; Mitrou, C. K.; Doyle, J. G. |
| Abstract: |
We present an investigation of rotation-activity correlations using IUE SWP measurements of the C 4 emission line at 1550 AA for 72 active binary systems. We use a standard stellar evolution code to derive non-empirical Rossby numbers for each star in our sample and compare the resulting C 4 rotation-activity correlation to that found for empirically derived values of Rossby number. We find only a marginal improvement in the correlation which suggests an additional factor other than rotation or convective motion influencing the activity levels in evolved stars. We conclude that current dynamo theory is limited in its application to the study of active stars because of the uncertainty in the angular velocity-depth profile in stellar interiors and the unknown effects of binarity and surface gravity. |
|
|
|
|
|
