2D disk models from CO isotopologues line

The goal of this work is to use less abundant CO isotopologues, such as ^13^CO, C^18^O and C^17^O, whose detection is routine for ALMA, to infer the gas mass of disks.

Isotope-selective ects need to be taken into account in the analysis, because they can significantly modify CO isotopologues line intensities. CO isotope-selective photodissociation has been implemented in the physical-chemical code DALI (Dust And LInes) and more than 800 disk models have been run for a range of disk and stellar parameters. Dust and gas temperature structures have been computed self-consistently, together with a chemical calculation of the main atomic and molecular species.