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Application of a novel radiative transfer scheme in the context of core collapse

vergrößern: Figure 1
Figure 1: Collapse of a subvirial core of mass 150 M with a seeded turbulent velocity field set to a virial parameter α=0.14. From left to right column density, Σ, gas temperature, T, dust temperature, Tdust, and infrared radiation intensity, Jrad, are shown. In the early stage of the simulation gas is heated by compression in the form of pdV work, gas-dust coupling heats up the dust, which radiates with increasing temperature. In the course of the simulation, through gravitational collapse, young stellar objects arise, which heat up the environment and become the principal source of radiation. The simulation, as shown here, evolves to about 0.3 free fall times which corresponds to about 12.6 kyr. By that time 2 stellar objects have formed, a 10 M star and 0.5 M protostar.

Theoretical Astrophysics group Cologne - TAC

Our research deals with the numerical modelling of the star formation process by means of high-performance, 3D, magneto-hydrodynamical (MHD) simulations. The simulations cover large spatial scales from ISM physics on kpc scales over molecular clouds on scales of 10 - 100 pc to star forming filaments on (sub-) pc scales and finally to protostellar discs and jets on scales of 10 - 1000 AU.

In our research group we use several tools like the (M)HD codes FLASH, GADGET, GANDALF , the astrochemical code KROME, 3D-PDR or radiative transport codes like RADMC-3D and POLARIS.

Prof. Dr. Stefanie Walch-Gassner is the head of the SILCC project (SImulating the life Cyle of molecular Clouds), a collaboration of several European astrophysical institutes, which has set the aim to model the formation, evolution, and dispersal of molecular clouds in 3D, MHD simulations with particular focus on a detailed astro-chemical modelling and the inclusion of various feedback processes.

Contact information:

  • Phone: (+49|0) 221 / 470 - 3497
  • Fax: (+49|0) 221 / 470 - 5162
  • Email: walch [at] ph1.uni-koeln.de

Consultation hours

upon agreement in Room 1.14, Building 312