P. Reegen
Papers
1
Total Citations
16
H-Index
1
About
P. Reegen is a stellar astrophysicist whose work centers on the rotation, magnetic activity, and evolutionary dynamics of evolved stars, particularly giants in the Hertzsprung gap. Their most-cited study, "Rotation and magnetic activity of the Hertzsprung-gap giant 31 Comae" (2010, 16 citations), tackles a long-standing puzzle: why this rapidly rotating G0 giant exhibits strong chromospheric and coronal emissions yet lacks detectable photometric variability. Reegen’s analysis reveals that 31 Comae, as a Hertzsprung-gap star, is likely in a phase of internal moment-of-inertia rearrangement, which decouples its surface magnetic activity from brightness changes. This work clarifies how stellar structure and rotation interact during a critical evolutionary stage, offering key insights into angular momentum transport and dynamo processes. While their citation count reflects a focused, specialized impact, Reegen’s contribution is notable for resolving a paradoxical observation and advancing our understanding of magnetic activity in intermediate-mass stars. Their research remains valuable for students and researchers exploring stellar evolution, rotation, and magnetism in post-main-sequence objects.
Research Focus
Key Achievements
Top Papers
- 1Rotation and magnetic activity of the Hertzsprung-gap giant 31 Comae16 citations · 2010