Sándor Demes

Postdoctoral research fellow

University of Rennes 1
Institute of Physics of Rennes

Department of Molecular Physics

Building 11B, Room 136,
263 avenue du Général Leclerc,

35042 Rennes CEDEX, France

Phone: +33(0)
E-mail: sandor.demes at univ-rennes.fr

Currently I am a postdoctoral research fellow at Institute of Physics of Rennes (IPR). As a member of the COLLEXISM project my research is focusing on the collisional excitation of hydrogen-containing molecules and cations in astrophysical media using highly accurate theoretical methods. I am carrying out close-coupling cross section calculations for state-to-state rotational excitation of hydronium (H3O+), ammonia (NH3) and chloronium (H2Cl+) in collision with molecular hydrogen (H2), which is the most abundant species in interstellar molecular clouds. From the cross sections the corresponding thermal rate coefficients are computed, which allows one to perform astrophysical (radiative transfer) modeling of interstellar molecular clouds. These modelings help to analyse the physical conditions in such environments and interpret the observations in both dense and diffuse interstellar media, where local thermodynamic equilibrium conditions are not fulfilled, but the temperature can reach several hundreds of kelvins.

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