MINDS
Astronomy and Astrophysics, vol. 705, pp. A97
Abstract
Context . Dynamical disk-companion interactions can have a significant impact on the evolution of circumstellar disks, as these can produce perturbations to the material distribution, density, and temperature, affecting their potential for planet formation. Aims . As part of the JWST GTO program MINDS, we analyze the mid-infrared (MIR) emission of three Class II binary systems: VW Cha, WX Cha, and RW Aur. Our aim is to investigate the impact of stellar multiplicity on the chemistry and physics of their inner disk. Methods . We analyzed the 1D spectrum from JWST/MIRI-MRS for primary and secondary disks separately, extracted via a combination of forward modeling with a theoretical PSF and aperture photometry. Following the continuum subtraction, we modeled the molecular lines with 0D slab models. We interpreted the results by comparing our JWST spectra to VLT/CRIRES+, Spitzer/IRS. The extended MIR emission was compared to ALMA data, with the inclusion of the binary DF Tau in our sample. Results . Primary and secondary disks are dramatically different in their MIR emission, with primary disks exhibiting H 2 O-rich spectra and secondary disks being mostly line-poor with respect to the sensitivity of our spectra. When comparing MIRI-MRS to Spitzer/IRS, we observed a broad variability in the line emission of VW Cha A and in the continuum of RW Aur A. The disks around VW Cha BC and RW Aur B show evidence of ionizing radiation and a further comparison with ALMA at high angular resolution dust continuum suggests that the spectrum of RW Aur B is well explained by its ~4 au cavity. All the systems show [Ne II] jet emission and three of them also show spatially resolved emission structures in H 2 , likely originating from outflows and dynamical interactions. Conclusions . Many of the observed features in the primary disks, such as enhanced water emission, could be linked to the increased accretion and radial drift produced by dynamical disk truncation. However, additional mechanisms are needed to explain the large differences between primary and secondary disks, potentially inner disk substructures. This work highlights the need for combining data from multiple facilities to fully understand the observations from JWST.
Authors 19
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Max Planck Institute for Extraterrestrial Physics
Affiliation as printed
Max-Planck-Institut für Extraterrestrische Physik
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Carnegie Institution for Science · Earth and Planets Laboratory
Affiliation as printed
Earth and Planets Laboratory, Carnegie Institution for Science
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University
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Leiden University · Max Planck Institute for Extraterrestrial Physics · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University
Max-Planck-Institut für Extraterrestrische Physik
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Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck-Institut für Astronomie (MPIA)
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Affiliation as printed
Kapteyn Astronomical Institute, Rijksuniversiteit Groningen
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University of Liège · KU Leuven
Affiliation as printed
Institute of Astronomy, KU Leuven
STAR Institute, Université de Liège
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Affiliation as printed
Department of Physics, Texas State University
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Affiliation as printed
Institute of Astronomy, KU Leuven
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Affiliation as printed
School of Physics and Astronomy, University of Exeter
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Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck-Institut für Astronomie (MPIA)
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Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck-Institut für Astronomie (MPIA)
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University of Vienna · ETH Zurich · Institute for Particle Physics and Astrophysics
Affiliation as printed
Dept. of Astrophysics, University of Vienna
ETH Zürich, Institute for Particle Physics and Astrophysics
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Centre National de la Recherche Scientifique · Commissariat à l'Énergie Atomique et aux Énergies Alternatives · Université Paris-Saclay
Affiliation as printed
Université Paris-Saclay, Université Paris cité, CEA, CNRS, AIM
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University
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University of Copenhagen · Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck-Institut für Astronomie (MPIA)
Niels Bohr Institute, University of Copenhagen
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Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck-Institut für Astronomie (MPIA)
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Max Planck Institute for Astronomy
Affiliation as printed
Max-Planck-Institut für Astronomie (MPIA)
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