HEA Research: Computational Stellar Astrophysics

The Computational Stellar Astrophysics (CSA) group uses numerical models to study:

  • Coronal structure and dynamics, as well as coronal heating of other stars.
  • Plasma physics in exoplanetary systems - this research involves interplanetary physics and space weather of close-in exoplanets, star-planet magnetic interaction, and magnetospheric dynamics and physics of the upper atmospheres of close-in planets.
  • The corona and interplanetary environment of the young Sun.
  • Radiation and ionization in accretion disks.
  • Novae Hydrodynamics.
Models used by the CSA group:
  • BATS-R-US - global Magnetohydrodynamic (MHD) code (U. of Michigan).
  • PINTofALE - Package for Interactive Analysis of Line Emission.
  • MOCASSIN - MOnte CArlo SimulationS of Ionized Nebulae.
  • FLASH - global model for Hydrodynamic and MHD (U. of Chicago).


Ofer Cohen, Jeremy Drake, Vinay Kashyap, Steve Saar, Cecilia Garraffo, Dai Takei.

Publications (ADS)

Here are Some Results from CSA Simulations:

Left: Star-planet Interaction in HD 189733 (click on image to see a movie). Right: A space weather CME event on a close-in exoplanet (click on image to see a movie)


Stellar coronae of young active stars (AB Doradus)


Modeling the young Sun and its solar wind


Stellar angular momentum loss rates


Section Photo