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Tracing the early planet formation with molecular lines: chemistry of vortex in the protoplanetary disks

Published online by Cambridge University Press:  13 January 2020

Natalia Dzyurkevich ,
Wladimir Lyra  and
Liton Majumdar
Natalia Dzyurkevich
Affiliation:
Institut für Theoretische Astrophysik, University of Heidelberg, Albert-Überle Str. 2, Heidelberg, D-69120, Germany email: dzyurkevich@ita.uni-heidelberg.de Dept. of Physics & Astronomy & California State University at Northridge 18111 Nordhoff St, Northridge, CA 91330 email: wlyra@csun.edu
Wladimir Lyra
Affiliation:
Dept. of Physics & Astronomy & California State University at Northridge 18111 Nordhoff St, Northridge, CA 91330 email: wlyra@csun.edu
Liton Majumdar
Affiliation:
Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 email: neal.j.turner@jpl.nasa.gov
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Abstract

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The millimeter observations of dust in protoplanetary disks show us spectacular structures like numerous gaps, vortices and spirals. In particular, IRS 48 disk demonstrates a large vortex-like structure. Molecular lines provide information about disks that is complementary to dust continuum observations: formaldehyde was found on the inner edge of the IRS 48 vortex, along with detections of SO2 and CS isotopes.

We use a reduced chemical network containing main carbon- and sulfur-bearing species to find the molecular species which can be sensitive to the gaps in dust, as well as to accumulation of the dust grains in the vortex. We find that SO molecule is the main reservoir for sulfur in IRS 48, for adopted disk model as in Bruderer et al. 2014. While SO is very sensitive to the gap edge, it cannot trace the vortex as it is weakly responding to the local increase in dust. Instead, SO2 molecule abundance can be expected to drop quickly within the vortex, making it an interesting tracer of dust-trapping structure.

Keywords

Astrochemistryprotoplanetary systems: protoplanetary disks
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S345: Origins: From the Protosun to the First Steps of Life , August 2018 , pp. 285 - 286
Copyright
© International Astronomical Union 2020 

References

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