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Expanding bubbles in SILCC-Zoom simulations

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  • Figure 1: Synthetic emission maps of [CII] of four simulated molecular clouds showing expanding bubbles due to stellar feedback. Stars are represented with different colors and sizes according to their age and temperature. The emission maps are here the result of radiative transfer calculations performed with the original C+ abundance obtained from the simulations, which yields to a relative large line intensity in the inner part of the expanding bubbles.
  • Figure 2: Same as Figure 1, but in this case the C+ is the result of the post-processing tool that we implemented. The bubbles are now considerably darker in [CII], which is in better agreement with real observations, and structures like pillars are visible.

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