Main-sequence Kepler stars exhibit enhanced chromospheric Ca II IRT activity after the intermediate-period gap, paralleling the photospheric Sph signature.
Core-envelope decoupling drives radial shear dynamos in cool stars
1 Pith paper cite this work, alongside 18 external citations. Polarity classification is still indexing.
1
Pith paper citing it
18
external citations · Pith
abstract
Differential rotation is thought to be responsible for the dynamo process in stars like our Sun, driving magnetic activity and star spots. We report that star spot measurements in the Praesepe open cluster are strongly enhanced only for stars which depart from standard models of rotational evolution. A decoupling of the spin down history between the core and envelope explains both the activity and rotation anomalies: surface rotational evolution is stalled by interior angular momentum redistribution, and the resultant radial shears enhance star spot activity. These anomalies provide evidence for an evolving front of shear-enhanced activity affecting the magnetic and rotational evolution of cool stars and the high-energy environments of their planetary companions for hundreds of millions to billions of years on the main sequence.
fields
astro-ph.SR 1years
2026 1verdicts
ACCEPT 1representative citing papers
citing papers explorer
-
Hints of enhanced magnetic activity after the intermediate rotation period gap as traced by the chromospheric Ca ii infrared triplet
Main-sequence Kepler stars exhibit enhanced chromospheric Ca II IRT activity after the intermediate-period gap, paralleling the photospheric Sph signature.