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Research Interests
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As a numerical astrophysicist, I have introduced the following mecanisms in the simulation code Gadget-2 :
- Radiative Cooling :
- - for a gas of primordial composition in photoionisation equilibrium, following Katz et al. (1996);
- - with the contribution of molecular hydrogen transition lines, following Galli & Palla (1998);
- - with the correction induced by atomic lines of heavy elements, using Sutherland & Dopita (1993) tables.
- Heating by photoionisation :
- - takes into account a UV background produced by QSO and Starburst galaxies (Haardt & Madau, 2001);
- - include as well the local contribution from massive stars, by using Stromgren sphere around the sources.
- Star Formation process :
- a phenomenological approach offer the possibility to form simple stellar populations under particular conditions of the medium
- Baryonic matter recycling :
- stellar mass losses (stellar winds and SN ejecta) are return to the ISM according to the chosen IMF
- Feedback by supernovae (SN) :
- modeling Sedov explosions by the kinetic action of shell pistons
- chemical enrichment of the ISM by heavy elements
- Turbulent metallic diffusion :
- transport of heavy elements along the gradients of concentration
- AGN activity :
- introduction of BH seeds
- merging of close sink particles
- baryonic disk accretion
- kinetic jet feedback
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Follow the link to see a collection of movies
that illustrate the impact of some of the above mecanisms
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