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Searching for chemical signatures of planet formation

Published online by Cambridge University Press:  13 January 2020

Ch. Rab Open the ORCID record for Ch. Rab [Opens in a new window] ,
G.A. Muro-Arena ,
I. Kamp ,
C. Dominik ,
L.B.F.M. Waters ,
W-F. Thi  and
P. Woitke
Ch. Rab
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands email: rab@astro.rug.nl
G.A. Muro-Arena
Affiliation:
Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
I. Kamp
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands email: rab@astro.rug.nl
C. Dominik
Affiliation:
Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
L.B.F.M. Waters
Affiliation:
Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands SRON Netherlands, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
W-F. Thi
Affiliation:
MPE, Giessenbachstrasse 1, 85748 Garching, Germany
P. Woitke
Affiliation:
SUPA, School of Physics & Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, UK
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Abstract

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High spatial resolution observations with ALMA and VLT/SPHERE show gaps and rings in continuum emission of protoplanetary disks, possibly indicating ongoing planet formation. However, it is still unclear if the gas follows the dust distribution. We present radiation thermo-chemical models for the disk of HD 163296 to study the impact of dust and gas gaps on the chemistry and molecular line emission. We compare a model with only dust gaps to a model that also has gas gaps. In both models, rings and gaps are visible in (sub)mm molecular line emission. Due to chemistry, certain molecules are sensitive to dust gaps where others are more sensitive to gas depletion. Observations of multiple molecules might allow to accurately determine the degree of gas depletion within the dust gaps, information crucial to discriminate between gap formation theories (e.g. planets, ice lines).

Keywords

stars: pre–main-sequence(stars:) planetary systems: protoplanetary disksastrochemistryradiative transfermethods: numerical
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. 362 - 364
Copyright
© International Astronomical Union 2020 

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