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Optical emission from supernova remnants: geometry matters!

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  • Großansicht: Figure 1
    Figure 1: Optical emission and FUV (yellow, E < 13.6 eV) and UV emission (violet, 13.6 eV < E < 100 eV) from the SNR in 3D, time: 0.16 Myr after the SN explosion. Note: this is only a part of the simulation box.
  • Großansicht: Figure 2
    Figure 2: Evolution of [O III] /Hα line ratio after the simple radiative transfer for 3 different projections (the axis along which the projection is made is written in the upper left corner of each picture). For each shaded region: top limit if the position of the observer from the top of the cube along the according axis, bottom limit - the opposite position. Dashed line shows the theoretical border between different type of objects (SNR, planetary nebulae (PN) or HII region). Red line is a previous value for the line ratio without any radiative transfer.

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