[EN] Aims. The effective medium approximations (EMAs), or the Lorentz-Lorenz, Maxwell-Garnett, and Bruggeman models, largely used to obtain optical properties and porosities of pure and ice mixtures, have been experimentally ...

In this work we present the results of a series of laboratory experiments performed to obtain the density and the real part of the refractive index of binary mixtures of ices of astrophysical interest. Densities of CO 2:CH ...

[ES] En este trabajo se presentan los resultados de experimentos de laboratorio enfocados a obtener la densidad y el índice de refracción (parte real) de mezclas de compuestos binarios en estado sólido. La densidad de las ...

[EN] ontext. The diffusion of volatile species on amorphous solid water ice affects the chemistry on dust grains in the interstellar medium as well as the trapping of gases enriching planetary atmospheres or present in ...

[ES] El estudio técnico que conforma el trabajo final de grado tiene como objetivo el diseño, adquisición, montaje y validación de un equipo experimental para la caracterización de sólidos a bajas temperaturas. El objetivo ...

[EN] We have experimentally determined the polarizability of using the Lorentz-Lorenz equation by simultaneously measuring the density and the refractive index. The conditions were solid phase, mbar pressure, and temperature ...

The C2H6 molecule has been used to determine experimentally, for the first time, the frequency factor present in the Polanyi-Wigner equation and to study how temperature influences this magnitude for a zeroth order desorption. ...

[EN] This work calculates the Lorentz-Lorenz coefficient with the refractive index and density values of various molecules in their solid phase measured in our laboratory under astrophysical conditions. This was completed ...

The optical properties and density of ammonia have not been exhaustively studied despite the relevance of these characteristics in astrophysical scenarios. This work presents new data pertaining to the real part of the ...

[EN] The desorption process of methanol in the hot cores of massive young stars is addressed in this work. The study of pure methanol ice and when it is mixed or layered with water allows a better understanding of the ...