Falk Herwig
@fherwig.bsky.social
Astrophysics prof at University of Victoria interested in how and where the elements form in stars and stellar explosions and how to use anything computing or digital to find out.
Being at the centre of one of science’s biggest data challenges and involved in this international "Big Science" project will bring more exciting opportunities. And this isn't just about astronomy: advanced data methods and algorithms with potential uses in medical imaging, remote sensing and AI.
September 23, 2025 at 5:32 PM
Being at the centre of one of science’s biggest data challenges and involved in this international "Big Science" project will bring more exciting opportunities. And this isn't just about astronomy: advanced data methods and algorithms with potential uses in medical imaging, remote sensing and AI.
In a one-D stellar evolution model this would be equivalent to adiabatic step penetration, and admittedly a reversal from my paper 25 years ago (Herwig 2000A&A...360..952H) that adopted the radiative exponential overshooting for core convection in main-sequence stars.
January 25, 2025 at 11:39 PM
In a one-D stellar evolution model this would be equivalent to adiabatic step penetration, and admittedly a reversal from my paper 25 years ago (Herwig 2000A&A...360..952H) that adopted the radiative exponential overshooting for core convection in main-sequence stars.
Our model invokes a reduced entropy equation with turbulent dissipation input from 3D hydro simulations and takes all terms incl. buoyancy and the pressure-gradient force into account. Extrapolating this model to nominal heating (log b = 0 in the figure) gives penetrative boundary mixing of 0.7Hp.
January 25, 2025 at 11:39 PM
Our model invokes a reduced entropy equation with turbulent dissipation input from 3D hydro simulations and takes all terms incl. buoyancy and the pressure-gradient force into account. Extrapolating this model to nominal heating (log b = 0 in the figure) gives penetrative boundary mixing of 0.7Hp.
... best shown in line plots.Our analysis demonstrates that energetically and on a global scale work done by the large-scale pressure gradients is equally important in core convection as the buoyancy force. That was new to me and has obviously implications for any model of convective penetration.
January 25, 2025 at 11:39 PM
... best shown in line plots.Our analysis demonstrates that energetically and on a global scale work done by the large-scale pressure gradients is equally important in core convection as the buoyancy force. That was new to me and has obviously implications for any model of convective penetration.