The power of PolyFiX at NOEMA: new insights into sulfur chemistry in DM Tau
- 1Max Planck Institute for Astronomy, Heidelberg, Germany
- 2Department of Chemistry, Ludwig Maximilian University, Munich, Germany
- 3Univ. Grenoble Alpes, CNRS, Institut de Planétologie et d’Astrophysique de Grenoble (IPAG), Grenoble, France
- 4Istituto Nazionale di Astrofisica, Osservatorio Astrofisico di Arcetri, Firenze, Italy
- 5Center for Astrophysics, Harvard and Smithsonian, Boston, USA
- 6Laboratoire d'Astrophysique de Bordeaux, Pessac, France
We performed a deep search for CCS, SO, SO2, OCS, H2S, H2CS and other molecules in the DM Tau
protoplanetary disk at 2mm with PolyFiX@NOEMA. With a beam of ~2''x1'' and a spectral resolution of 0.3 km/s,
a high sensitivity of ~3.8 mJy/beam was achieved. We detected o-H2S, o-H2CS, and DNC (first time in DM Tau)
as well as H13CO+, N2D+, and, tentatively, HC3N. We have not detected SO2, our main target molecule. We used the
non-LTE radiative transfer code RADEX to derive disk-averaged column densities and their upper limits. These values,
together with our previous ALMA CS data were used for disk chemical modeling. The presence of CS and the lack of
SO2 in the DM Tau disk molecular layer can only be reliably explained by the disk model with a non-solar gas-phase C/O ratio
of ~1, supporting previous findings.
How to cite: Semenov, D., Favre, C., Fedele, D., Teague, R., Dutrey, A., Guilloteau, S., Henning, T., and Smirnov-Pinchukov, G.: The power of PolyFiX at NOEMA: new insights into sulfur chemistry in DM Tau, Europlanet Science Congress 2020, online, 21 September–9 Oct 2020, EPSC2020-304, https://doi.org/10.5194/epsc2020-304, 2020
