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NBIA Workshop on Radiation Transfer in Astrophysics

6–10 Jun 2022
Europe/Copenhagen timezone

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Session

Protoplanetary Disks

7 Jun 2022, 13:30

Presentation materials

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  1. 78. Radiation thermo-chemical modeling of planet forming disks
    Inga Kamp
    07/06/2022, 13:30
    Protoplanetary Disks
    Talk

    With the advent of high spatial resolution ALMA data and the prospect of JWST data in the near future, we have entered an era where the limitations of simple disk models are becoming clear. The data reveal to us the complex interplay between gas and dust in disks, which happens not only at the level of physics (heating/cooling) and chemistry, but also at the level of radiative transfer. I will...

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  2. 51. Hydrogen-line emission from accreting planets: fluxes, line shapes, and a new correlation
    Gabriel-Dominique Marleau (Universität Tübingen)
    07/06/2022, 14:00
    Planetary Atmospheres
    Talk

    Recent direct evidence for ongoing accretion at gas giants such as PDS 70 b and c and Delorme 1 (AB)b make theoretical models of hydrogen-line emission timely. For the shock at the planet's surface, we present fluxes in the strongest indicators (H alpha, H beta, Pa beta, etc.) using the non-LTE, chemical-kinetics code of Aoyama et al. (2018). We consider the relevant large parameter space in...

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  3. 59. Discontinuous finite element method applied to the 2D radiative transfer problem in axisymmetric circumstellar envelopes
    Jérémy Perdigon
    07/06/2022, 14:20
    Protoplanetary Disks
    Talk

    The study of circumstellar environments at different stages of stellar evolution is of crucial importance. These environments reflect the physical processes in action, from the star formation with the presence of accretion discs to late stages in the evolution, in which strong stellar winds shape the circumstellar envelopes. In order to constrain the models describing them, it is necessary to...

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  4. 87. Radiative transfer and protostars and disks: an observer's perspective
    Lars Kristensen
    07/06/2022, 15:30
    Protoplanetary Disks
  5. 68. Dissecting the kinematics of an infalling envelope with modeling of absorption and emission
    Yao-Lun Yang (University of Virginia)
    07/06/2022, 15:50
    Protoplanetary Disks
    Talk

    Infall drives the growth of protostars in terms of their mass as well as the structural and chemical complexities.  The rich spectra of molecules best probe the infall kinematics at a wide range of spatial scales and physical environments.  Molecular emission highlights the infalling gas as specific patterns in position-velocity diagrams and streamers. Moreover, red-shifted absorption against...

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  6. 56. Multi-fluid Radiation Hydrodynamics of Protoplanets
    Leonardo Krapp (Niels Bohr Institute)
    07/06/2022, 16:10
    Protoplanetary Disks
    Talk

    The coupling between multi-species dust dynamics and radiative transfer is crucial for the realistic modeling of cold astrophysical environments such as star-forming regions, protoplanetary disks, and exoplanets atmospheres. At low temperatures, dust distribution plays a primordial role in shaping gas opacity, even when the dust mass fraction is negligible. Thus, in this talk, I will present a...

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