23 citations · 37 across the 3 of their papers we have counts for
5 papers
Explaining the Observed Relation Between Stellar Activity and Rotation
Eric G. Blackman, John H. Thomas
Observations of late-type main-sequence stars have revealed empirical scalings of coronal activity versus rotation period or Rossby number (a ratio of rotation period to conve…
Theoretical Models of Sunspot Structure and Dynamics
John H. Thomas
Recent progress in theoretical modeling of a sunspot is reviewed. The observed properties of umbral dots are well reproduced by realistic simulations of magnetoconvection in a vert…
Extracting Rotational Energy in Supernova Progenitors: Transient Poynting Flux Growth vs. Turbulent Dissipation
Eric G. Blackman, Jason T. Nordhaus, John H. Thomas
Observational evidence for anisotropy in supernovae (SN) may signal the importance of angular momentum and differential rotation in the progenitors. Free energy in differential rot…
Fuel-Supply-Limited Stellar Relaxation Oscillations: Application to Multiple Rings around AGB Stars and Planetary Nebulae
H. M. Van Horn, J. H. Thomas, A. Frank +1
We describe a new mechanism for pulsations in evolved stars: relaxation oscillations driven by a coupling between the luminosity-dependent mass-loss rate and the H fuel abundance i…
Dynamos in Asymptotic-Giant-Branch Stars As the Origin of Magnetic Fields Shaping Planetary Nebulale
Eric G. Blackman, Adam Frank, J. Andrew Markiel +2
Planetary nebulae are thought to be formed when a slow wind from the progenitor giant star is overtaken by a subsequent fast wind generated as the star enters its white dwarf stage…