| |
 |
| Paper: |
Long Term X-ray Variability in Cool Stars |
| Volume: |
154, Cool Stars, Stellar Systems and the Sun: Tenth Cambridge Workshop |
| Page: |
223 |
| Authors: |
Stern, Robert A. |
| Abstract: |
The Sun's 11-year activity cycle, as observed in visible light, radio waves, ultraviolet, and X-radiation, is now a well-established phenomenon. In contrast, observed activity cycles in cool stars are limited primarily to variations in Ca 2 chromospheric reversals. X-ray observations of active cool stars have produced little or no evidence for cycles similar to the Sun's. This result is likely a combination of observational limitations and the nature of the stellar dynamo in very active stars. |
|
|
|
|
|
