EPoS Contribution
EPoS Contribution
High-angular resolution search for deuterated molecules in the protostar IRAS16293-2422

Edwige Chapillon
Max-Planck-Institut für Radioastronomie, Bonn, Germany
Observations of deuterated molecules have proven to be an efficient tool to constrain astrochemical processes in star forming regions. Previous observations have revealed that the gas surrounding low-mass protostars shows a very high degree of deuterium fractionation, in particular in the close and luminous low-mass protostellar source IRAS16293-2422. Yet, observed fractionation are still challenging models. Notably models are not able to predict simultaneously the deuteration in water and methanol. Nevertheless, IRAS16293 is a binary source with a separation of 5'' between the A and B components. So far, all previous observations of deuterated molecules were done with single dish, thus the derived fractionation values are averaged over a ~10'' beam and all derived quantities are averaged on the two sources. High angular resolution observations are therfore essential to properly model the spatial distribution of deuterium fractionation. We present here high resolution observations of deuterated molecules towards IRAS16293-2422, and the implications of these new observations on the abundance profile of these molecules determined so far from single-dish observations.
Collaborators:
F.C. Liu, MPIfR, Germany
B. Parise, MPIfR Germany
Suggested Session: Chemistry, Cores and Collaps