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.
We are looking forward to hosting Stellar Hydro Days VI in Victoria next week sites.google.com/view/stellar...
A week dedicated to a deep dive into 3D simulations of stars, transport phenomena, internal gravity waves, asteroseismology predictions, wave turbulence and more ....
A week dedicated to a deep dive into 3D simulations of stars, transport phenomena, internal gravity waves, asteroseismology predictions, wave turbulence and more ....
May 11, 2025 at 1:15 AM
We are looking forward to hosting Stellar Hydro Days VI in Victoria next week sites.google.com/view/stellar...
A week dedicated to a deep dive into 3D simulations of stars, transport phenomena, internal gravity waves, asteroseismology predictions, wave turbulence and more ....
A week dedicated to a deep dive into 3D simulations of stars, transport phenomena, internal gravity waves, asteroseismology predictions, wave turbulence and more ....
Great accomplishment @wrtastro.bsky.social !!! William not only did exceptional work in the field of planet imaging but also lead one of our most important projects in recent years in computational stellar astrophysics on internal gravity waves in massive stars ui.adsabs.harvard.edu/abs/2024MNRA...
March 27, 2025 at 2:52 PM
Great accomplishment @wrtastro.bsky.social !!! William not only did exceptional work in the field of planet imaging but also lead one of our most important projects in recent years in computational stellar astrophysics on internal gravity waves in massive stars ui.adsabs.harvard.edu/abs/2024MNRA...
First paper by our MSc student Praneet Pathak: model uncertainties in white dwarf cooling ages. For a typical white dwarf, systematic uncertainties can reach 0.8 Gyr at 4000K – comparable to measurement errors! This is key when white dwarfs are used as cosmic clocks. arxiv.org/abs/2410.14014
March 13, 2025 at 7:43 AM
First paper by our MSc student Praneet Pathak: model uncertainties in white dwarf cooling ages. For a typical white dwarf, systematic uncertainties can reach 0.8 Gyr at 4000K – comparable to measurement errors! This is key when white dwarfs are used as cosmic clocks. arxiv.org/abs/2410.14014
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.