Sailing with the winds of HL Tau: the JWST view

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   Time-resolved protoplanetary disk physics in DQ Tau with JWST

   Á. Kóspál, P. Ábrahám, V. V. Akimkin et al. · 2025 · A&A 703, A20 (2025) · cited 2 times · AI summary available

   Abstract

   Accretion variability is ubiquitous in YSOs. While large outbursts may strongly affect the disk, the effects of moderate bursts are less understood. We aim to study the physical response of the disk around the eccentric binary system DQ Tau to its periodic accretion changes. We organized a multi-wavelength campaign centered on four JWST/MIRI spectra. We targeted three periastrons (high accretion state) and one apastron (quiescence). We used optical and near-infrared spectroscopy and photometry to measure how the accretion luminosity varies. We decomposed the multi-epoch SEDs into stellar, accretion, and rim components. We fitted the solid-state features using various opacity curves and the m…

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   PDRs4All III: JWST's NIR spectroscopic view of the Orion Bar

   Els Peeters, Emilie Habart, Olivier Berne et al. · 2023 · A&A 685, A74 (2024) · cited 57 times · Not summarized yet

   Abstract

   (Abridged) We investigate the impact of radiative feedback from massive stars on their natal cloud and focus on the transition from the HII region to the atomic PDR (crossing the ionisation front (IF)), and the subsequent transition to the molecular PDR (crossing the dissociation front (DF)). We use high-resolution near-IR integral field spectroscopic data from NIRSpec on JWST to observe the Orion Bar PDR as part of the PDRs4All JWST Early Release Science Program. The NIRSpec data reveal a forest of lines including, but not limited to, HeI, HI, and CI recombination lines, ionic lines, OI and NI fluorescence lines, Aromatic Infrared Bands (AIBs including aromatic CH, aliphatic CH, and their C…

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   MINDS. The detection of $^{13}$CO$_{2}$ with JWST-MIRI indicates abundant CO$_{2}$ in a protoplanetary disk

   Sierra L. Grant, Ewine F. van Dishoeck, Benoît Tabone et al. · 2022 · Solar and Stellar Astrophysics · cited 62 times · AI summary available

   Abstract

   We present JWST-MIRI MRS spectra of the protoplanetary disk around the low-mass T Tauri star GW Lup from the MIRI mid-INfrared Disk Survey (MINDS) GTO program. Emission from $^{12}$CO$_{2}$, $^{13}$CO$_{2}$, H$_{2}$O, HCN, and C$_{2}$H$_{2}$ is identified in this disk with $^{13}$CO$_{2}$ being detected for the first time in a protoplanetary disk. We characterize the chemical and physical conditions in the inner few au of the GW Lup disk using these molecules as probes. The spectral resolution of JWST-MIRI MRS paired with high signal-to-noise data is essential to identify these species and determine their column densities and temperatures. The $Q$-branches of these molecules, including those…

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   Water vapor in the protoplanetary disk of DG Tau

   L. Podio, I. Kamp, C. Codella et al. · 2013 · Solar and Stellar Astrophysics · cited 49 times · AI summary available

   Abstract

   Water is key in the evolution of protoplanetary disks and the formation of comets and icy/water planets. While high excitation water lines originating in the hot inner disk have been detected in several T Tauri stars (TTSs), water vapor from the outer disk, where most of water ice reservoir is stored, was only reported in the closeby TTS TW Hya. We present spectrally resolved Herschel/HIFI observations of the young TTS DG Tau in the ortho- and para- water ground-state transitions at 557, 1113 GHz. The lines show a narrow double-peaked profile, consistent with an origin in the outer disk, and are ~19-26 times brighter than in TW Hya. In contrast, CO and [C II] lines are dominated by emission …

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   JWST Imaging of Edge-on Protoplanetary Disks. V. Flux Ratio Reversal and Disk-edge Structure in the Flying Saucer

   Jie Ma, Karl R. Stapelfeldt, Marion Villenave et al. · 2026 · Earth and Planetary Astrophysics · AI summary available

   In short

   JWST reveals near-infrared brightness reversal and bright disk-edge linings in the Flying Saucer, consistent with inner-disk misalignment, forward scattering, and substantial dust growth.

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   Interpreting molecular hydrogen and atomic oxygen line emission of T Tauri disks with photoevaporative disk-wind models

   Ch. Rab, M. Weber, T. Grassi et al. · 2022 · A&A 668, A154 (2022) · cited 8 times · AI summary available

   Abstract

   Winds in protoplanetary disks play an important role in their evolution and dispersal. However, what physical process is driving the winds is still unclear (i.e. magnetically vs thermally driven), and can only be understood by directly confronting theoretical models with observational data. We use hydrodynamic photoevaporative disk-wind models and post-process them with a thermo-chemical model to produce synthetic observables for the o-H$_2$ at 2.12 micron and [OI] at 0.63 micron spectral lines and directly compare the results to a sample of observations. Our photoevaporative disk-wind model is consistent with the observed signatures of the blueshifted narrow low-velocity component (NLVC), w…

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   Coordinated Space and Ground Monitoring of Accretion Bursts in a Protoplanetary Disk: MIRI and iSHELL observe the long-term modulation of gas within a small inner disk cavity

   Jacob Hyden, Andrea Banzatti, Benjamin M. Tofflemire et al. · 2026 · Earth and Planetary Astrophysics · AI summary available

   In short

   Coordinated infrared monitoring shows that hot molecular gas in DQ Tau fades and its emitting region moves outward over successive accretion bursts, unlike hydrogen and continuum emission.

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   High angular resolution near-IR view of the Orion Bar revealed by Keck/NIRC2

   Emilie Habart, Romane Le Gal, Carlos Alvarez et al. · 2022 · A&A 673, A149 (2023) · cited 9 times · Not summarized yet

   Abstract

   Nearby Photo-Dissociation Regions (PDRs), where the gas and dust are heated by the far UV-irradiation emitted from stars, are ideal templates to study the main stellar feedback processes. With this study we aim to probe the detailed structures at the interfaces between ionized, atomic, and molecular gas in the Orion Bar. This nearby prototypical strongly irradiated PDR will be among the first targets of the James Webb Space Telescope (JWST) within the framework of the PDRs4All Early Release Science program. We employed the sub-arcsec resolution accessible with Keck-II NIRC2 and its adaptive optics system to obtain the most detailed and complete images, ever performed, of the vibrationally ex…