Study of the frequency factor in the thermal desorption of astrophysical ice analogs: CH 4 , C 2 H 4 , C 2 H 6 , CH 3 OH, CO, CO 2 , H 2 O and N 2

This work was supported by the Plan Nacional FIS2013-48087-C2-2-P and FIS2016-77726-C3-3-P of the Ministerio de Economia y Competitividad (co-financed by FEDER funds).