Rahul Kannan (Einstein Fellow, Harvard)

Arepo-RT : Radiation hydrodynamics on a moving mesh
When Mar 13, 2018 from 02:00 PM to 03:00 PM
  • Special Seminar
  • Colloquium
Where SH, Lecture hall
Add event to calendar vCal / iCal

I will introduce Arepo-RT, a novel radiation hydrodynamic (RHD) solver for the unstructured moving-mesh code Arepo. This method solves the moment-based radiative transfer equations using the M1 closure relation. The implementation is fully conservative and compatible with the withindividual timestepping scheme. The scheme incorporates atomic Hydrogen (H) and Helium (He) thermochemistry, which is used to couple the ultra-violet(UV) radiation field to the gas. Additionally, the infrared radiation is coupled to the gas under the assumption of local thermodynamic equilibriumbetween the gas and the dust.  Our tests show that this scheme is more efficient and reaches higher accuracy than previous radiative transfer schemesthat use the M1 closure relation.  The new code is suitable for studying various important astrophysical phenomena, such as the effect of radiativefeedback in driving galactic scale outflows, radiation driven dusty winds in high redshift quasars, or simulating the reionisation history of theUniverse self-consistently.