Searching for chemical signatures of planet formation

Ch Rab, G. A. Muro-Arena, I. Kamp, C. Dominik, L. B.F.M. Waters, W. F. Thi, P. Woitke, Bruce G. Elmegreen, L. Viktor Tóth, Manuel Güdel

Research output: Contribution to journalArticle


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).

Original languageEnglish
Pages (from-to)362-364
Number of pages3
JournalProceedings of the International Astronomical Union
Publication statusAccepted/In press - Jan 1 2020



  • (stars:) planetary systems: Protoplanetary disks
  • astrochemistry
  • methods: Numerical
  • radiative transfer
  • stars: Pre-main-sequence

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

Cite this

Rab, C., Muro-Arena, G. A., Kamp, I., Dominik, C., Waters, L. B. F. M., Thi, W. F., Woitke, P., Elmegreen, B. G., Tóth, L. V., & Güdel, M. (Accepted/In press). Searching for chemical signatures of planet formation. Proceedings of the International Astronomical Union, 362-364.