 |
Molecules in absorption at intermediate redshift
1 : Department of Earth and Space Sciences, Chalmers University of Technol ogy, Onsala Space Observatory, SE-43992 Onsala, Sweden
I will present ALMA observations of molecules in absorbers at intermediate redshifts (z=0.68;0.89). The molecules can be used to probe the physical and chemical properties of the interstellar medium in the disk of these distant galaxies. In particular with hydrides, we can unveil the multi-phase nature of the absorbing gas, and estimate the molecular fraction and cosmic ray ionization rate. In addition, isotopic ratios are used to probe the ISM enrichment by stellar nucleosynthesis.
