Europlanet Science Congress 2020
Virtual meeting
21 September – 9 October 2020
Europlanet Science Congress 2020
Virtual meeting
21 September – 9 October 2020
EPSC Abstracts
Vol.14, EPSC2020-304, 2020
https://doi.org/10.5194/epsc2020-304
Europlanet Science Congress 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

The power of PolyFiX at NOEMA: new insights into sulfur chemistry in DM Tau

Dmitry Semenov1,2, Cecile Favre3, Davide Fedele4, Richard Teague5, Anne Dutrey6, Stephane Guilloteau6, Thomas Henning1, and Grigorii Smirnov-Pinchukov1
Dmitry Semenov et al.
  • 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