Understanding Coronal Super-Saturation
Abstract
Despite 15 years since discovery, the cause of super-saturation - the reduction of coronal X-ray activity in very fast-rotating G- and K-stars - is still not resolved, yet must provide important clues to the behaviour of magnetic dynamos, B-field topology, and angular momentum loss at extreme rotation rates. By measuring the X-ray activity of several small M-dwarfs, rotating at twice the rate of previously studied objects, we will determine which parameter (rotation period, Rossby number or Keplerian co-rotation radius) best predicts super-saturation and hence test whether centrifugal stripping of the outer corona is a viable model.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2011
- Bibcode:
- 2011xmm..prop...82J
- Keywords:
-
- Stars;
- White Dwarfs;
- Solar System;
- HAT-091-0013763;
- HAT-342-0014345;
- HAT-239-0005732;
- HAT-153-0012909;
- HAT-216-0010666