Molecules with ALMA at Planet-forming Scales (MAPS). XVII. Determining the 2D Thermal Structure of the HD 163296 Disk
In: The Astrophysical Journal Supplement Series ; https://insu.hal.science/insu-03672364 ; The Astrophysical Journal Supplement Series, 2021, 257, ⟨10.3847/1538-4365/ac143f⟩, 2021
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Zugriff:
International audience ; Understanding the temperature structure of protoplanetary disks is key to interpreting observations, predicting the physical and chemical evolution of the disk, and modeling planet formation processes. In this study, we constrain the two-dimensional thermal structure of the disk around the Herbig Ae star HD 163296. Using the thermochemical code RAC2D, we derive a thermal structure that reproduces spatially resolved Atacama Large Millimeter/submillimeter Array observations (~0"12 (13 au)-0"25 (26 au)) of 12 CO J = 2 - 1, 13 CO J = 1 - 0, 2 - 1, C 18 O J = 1 - 0, 2 - 1, and C 17 O J = 1 - 0, the HD J = 1 - 0 flux upper limit, the spectral energy distribution (SED), and continuum morphology. The final model incorporates both a radial depletion of CO motivated by a timescale shorter than typical CO gas-phase chemistry (0.01 Myr) and an enhanced temperature near the surface layer of the the inner disk (z/r ≥ 0.21). This model agrees with the majority of the empirically derived temperatures and observed emitting surfaces derived from the J = 2 - 1 CO observations. We find an upper limit for the disk mass of 0.35 M ⊙ , using the upper limit of the HD J = 1 - 0 and J = 2 - 1 flux. With our final thermal structure, we explore the impact that gaps have on the temperature structure constrained by observations of the resolved gaps. Adding a large gap in the gas and small dust additionally increases gas temperature in the gap by only 5%-10%. This paper is part of the MAPS special issue of the Astrophysical Journal Supplement.
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Molecules with ALMA at Planet-forming Scales (MAPS). XVII. Determining the 2D Thermal Structure of the HD 163296 Disk
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Autor/in / Beteiligte Person: | Calahan, Jenny K. ; Bergin, Edwin A. ; Zhang, Ke ; Schwarz, Kamber R. ; Öberg, Karin I. ; Guzmán, Viviana V. ; Walsh, Catherine ; Aikawa, Yuri ; Alarcón, Felipe ; Andrews, Sean M. ; Bae, Jaehan ; Bergner, Jennifer B. ; Booth, Alice S. ; Bosman, Arthur D. ; Cataldi, Gianni ; Czekala, Ian ; Huang, Jane ; Ilee, John D. ; Law, Charles J. ; Le Gal, Romane ; Long, Feng ; Loomis, Ryan A. ; Ménard, François ; Nomura, Hideko ; Qi, Chunhua ; Teague, Richard ; Van'T Hoff, Merel L. R. ; Wilner, David J. ; Yamato, Yoshihide ; Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) ; Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France-Institut national des sciences de l'Univers (INSU - CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Météo-France ; ANR-16-CE31-0013,PLANET-FORMING-DISKS,De meilleurs modèles pour de meilleures données(2016) |
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Zeitschrift: | The Astrophysical Journal Supplement Series ; https://insu.hal.science/insu-03672364 ; The Astrophysical Journal Supplement Series, 2021, 257, ⟨10.3847/1538-4365/ac143f⟩, 2021 |
Veröffentlichung: | HAL CCSD ; IOPscience, 2021 |
Medientyp: | academicJournal |
DOI: | 10.3847/1538-4365/ac143f |
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