5 papers
Anisotropic non-Maxwellian velocity distributions in the solar transition region
Paola Testa, Bart De Pontieu, Kyuhyoun Cho +1
High resolution spectral observations of transition region spectral lines capture the signatures of energy deposition and redistribution at the boundary between the lower and upper…
Anti-Solar Differential Rotation May Have Revived Magnetic Braking in the Subgiant 31 Aquilae
Travis S. Metcalfe, Jennifer L. van Saders, Thomas R. Ayres +16
Recent observations have shown that sufficiently slow rotation disrupts the organization of large-scale magnetic field in older main-sequence stars, leading to weakened magnetic br…
Weakened Magnetic Braking Signals the Collapse of the Global Stellar Dynamo
Travis S. Metcalfe, Jennifer L. van Saders, Marc H. Pinsonneault +7
Weakened magnetic braking (WMB) was originally proposed in 2016 to explain anomalously rapid rotation in old field stars observed by the Kepler mission. The proximate cause was sug…
Magnetic braking and dynamo evolution of Hydri
A. R. G. Santos, T. S. Metcalfe, O. Kochukhov +3
The evolution of magnetic braking and dynamo processes in subgiant stars is essential for understanding how these stars lose angular momentum. We investigate the magnetic braking a…
Testing the Rossby Paradigm: Weakened Magnetic Braking in early K-type Stars
Travis S. Metcalfe, Pascal Petit, Jennifer L. van Saders +12
There is an intricate relationship between the organization of large-scale magnetic fields by a stellar dynamo and the rate of angular momentum loss due to magnetized stellar winds…