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

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1. Very close Same question Not relevant

   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

   Time-resolved protoplanetary disk physics in DQ Tau measures the disk’s response to periodic accretion changes using multi-epoch JWST/MIRI and other observations.

   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…

2. Close Broader context Not relevant

   Testing planet formation from the ultraviolet to the millimeter

   Nick Choksi, Eugene Chiang · 2021 · Earth and Planetary Astrophysics · cited 3 times · AI summary available

   Testing planet formation from the ultraviolet to the millimeter estimates accretion onto gap-embedded planets from gas surface densities and simulated planet masses.

   Abstract

   Gaps imaged in protoplanetary discs are suspected to be opened by planets. We compute the present-day mass accretion rates $\dot{M}_{\rm p}$ of seven hypothesized gap-embedded planets, plus the two confirmed planets in PDS 70, by combining disc gas surface densities $\Sigma_{\rm gas}$ from C$^{18}$O observations with planet masses $M_{\rm p}$ from simulations fitted to observed gaps. Assuming accretion is Bondi-like, we find in eight out of nine cases that $\dot{M}_{\rm p}$ is consistent with the time-averaged value given by the current planet mass and system age, $M_{\rm p}/t_{\rm age}$. As system ages are comparable to circumstellar disc lifetimes, these gap-opening planets may be undergoi…

3. Close Broader context Not relevant

   Towards a comprehensive view of accretion, inner disks, and extinction in classical T Tauri stars: an ODYSSEUS study of the Orion OB1b association

   Caeley V. Pittman, Catherine C. Espaillat, Connor E. Robinson et al. · 2022 · Solar and Stellar Astrophysics · cited 25 times · AI summary available

   The ODYSSEUS study models accretion and inner disk walls in nine Orion OB1b T Tauri stars, rather than tracking molecular gas during bursts.

   Abstract

   The coevolution of T Tauri stars and their surrounding protoplanetary disks dictates the timescales of planet formation. In this paper, we present magnetospheric accretion and inner disk wall model fits to NUV-NIR spectra of nine classical T Tauri stars in Orion OB1b as part of the Outflows and Disks around Young Stars: Synergies for the Exploration of ULLYSES Spectra (ODYSSEUS) Survey. Using NUV-optical spectra from the Hubble UV Legacy Library of Young Stars as Essential Standards (ULLYSES) Director's Discretionary Program and optical-NIR spectra from the PENELLOPE VLT Large Programme, we find that the accretion rates of these targets are relatively high for the region's intermediate age o…

4. Close Broader context Not relevant

   The hybrid disks: a search and study to better understand evolution of disks

   J. Pericaud, E. Di Folco, A. Dutrey et al. · 2016 · A&A 600, A62 (2017) · cited 33 times · AI summary available

   The hybrid-disks study surveys gas-bearing debris disks, a later evolutionary stage than DQ Tau’s burst-modulated inner protoplanetary disk.

   Abstract

   The increased sensitivity of millimeter-wave facilities now makes possible the detection of low amounts of gas in debris disks. Some of the gas-rich debris disks harbor peculiar properties, with possible pristine gas and secondary generated dust. The origin of the gas in these hybrid disks is strongly debated and the current sample is too sparse to understand this phenomenon. More detections are necessary to increase the statistics on this population. Lying at the final stages of evolution of proto-planetary disks and at the beginning of the debris disk phase, these objects could provide new insight into the processes involved in the making of planetary systems. We carried out a deep survey …

5. Close Broader context Not relevant

   H2 and CO emission from disks around TTauri and HerbigAe pre-main-sequence stars and from debris disks around young stars: warm and cold circumstellar gas

   W. F. Thi, E. F. van Dishoeck, G. A. Blake et al. · 2001 · astro-ph · cited 182 times · Not summarized yet

   The ISO-SWS study observes H₂ and CO emission from disks around young stars, characterizing warm and cold circumstellar gas.

   Abstract

   We present ISO-SWS observations of H2 pure-rotational line emission from the disks around low and intermediate mass pre-main-sequence stars as well as from young stars thought to be surrounded by debris disks. We detect `warm' (T ~ 100-200 K) H2 gas around many sources, including tentatively the debris-disk objects. The mass of this warm gas ranges from ~1E-4 Solar mass up to 8E-3 Solar mass, and can constitute a non-negligible fraction of the total disk mass. Complementary single-dish 12CO 3-2, 13CO 3-2 and 12CO 6-5 observations have been obtained as well. These transitions probe cooler gas at T ~ 20-80 K. Most objects show a double-peaked CO emission profile characteristic of a disk in Kep…

6. Close Same method, another problem Not relevant

   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

   The MINDS study uses JWST-MIRI molecular spectra, including H₂O and CO₂, to characterize physical and chemical conditions in a protoplanetary disk.

   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…

7. Close Same question Not relevant

   CO gaps in cold transition disks around low-mass stars

   A. A. Rota, N. van der Marel, E. F. van Dishoeck et al. · 2026 · Earth and Planetary Astrophysics · AI summary available

   CO gaps in cold transition disks investigates gas structure inside disk cavities using spatially resolved CO isotopologue observations.

   In short

   ALMA observations of three low-mass-star transition disks reveal dust cavities, CO emission within them, little inner dust, and high estimated inner-disk gas-to-dust ratios.

8. Close Same question Not relevant

   Impact of accretion variability on the CO emission of a disk around a very low-mass star with JWST

   C. Bergez-Casalou, B. Tabone, Y. Aoyama et al. · 2026 · Astronomy & Astrophysics · Not summarized yet

   The J1605 study compares JWST spectra from different epochs to investigate how accretion variability relates to atomic and molecular disk emission.

   Abstract

   Context: Very low-mass stars (M_⋆<0.2M_⊙) are known to host a larger fraction of terrestrial planets compared to higher mass stars. Studying the structure of their protoplanetary disk is therefore crucial to understanding the formation of Earth-like planets. Aims: In this work, we aim to characterize the innermost regions of the disk around a known very low-mass star, 2MASS J16053215-1933159 (J1605 hereafter), by analyzing new JWST/NIRSpec observations taken in 2024, two years after the first observation with JWST/MIRI in 2022. We intend to investigate the atomic and molecular emission in both spectra to establish a global view of the system and study its variability. Methods: After identify…

Prior work it builds on

1. Related* Shared data, tool or method Not relevant

   Lmfit: Non-Linear Least-Square Minimization and Curve-Fitting for Python

   M. Newville, A. Ingargiola, T. Stensitzki et al. · 2014 · cited 1,729 times · Not summarized yet

   Lmfit provides Python nonlinear least-squares minimization and curve-fitting, a generic analysis method cited by the paper.