Explanipedia

How the gradient of $M_{\rm d}$ versus UV field strength yields insights into the ages of protoplanetary disc populations Open

Gavin A. L. Coleman, Sierk van Terwisga · 2025

FUV radiation from massive stars launch photoevaporative winds from the outer regions of protoplanetary discs around other stars, removing gas and dust. Observations have identified a relation between the median dust disc mass and the exte…

Probing accretion and stellar properties in the Orion Nebula with VLT/X-Shooter Open

L. Piscarreta, G. Beccari, R. Claes, C. F. Manara, H. M. J. Boffin , et al. · 2025

Context. Multiple photometric studies have reported the presence of seemingly older accreting pre-main-sequence (PMS) stars in optical colour-magnitude diagrams (CMDs). These sources appear bluer than the majority of cluster members, leadi…

Time-resolved protoplanetary disk physics in DQ Tau with JWST Open

Á. Kóspál, P. Ábrahám, Vitaly Akimkin, Longyue Chen, J. Forbrich , et al. · 2025

Aims . Accretion variability is ubiquitous in young stellar objects. While large outbursts (2.5–6 mag) may strongly affect the disk structure, the effects of moderate bursts (1–2.5 mag) are less understood. Our aim is to characterize the p…

How the gradient of M d versus UV field strength yields insights into the ages of protoplanetary disc populations Open

Gavin A. L. Coleman, Sierk van Terwisga · 2025

Far-ultraviolet (UV) radiation from massive stars launches photoevaporative winds from the outer regions of protoplanetary discs around other stars, removing gas and dust. Observations have identified a relation between the median dust dis…

ANTIHEROES-PRODIGE: Quantifying the connection from the envelope to the disk with the IRAM 30 m telescope and NOEMA Open

C. Gieser, P. Caselli, Dominique Segura-Cox, J. E. Pineda, L. A. Busch , et al. · 2025

Context. Star formation is a hierarchical process that ranges from molecular clouds to individual protostars. In particular, it remains to be understood how infalling asymmetric structures (streamers) that deliver new material to protostel…

XUE: The CO2-rich terrestrial planet-forming region of an externally irradiated Herbig disk Open

Jenny Frediani, Arjan Bik, M. C. Ramírez-Tannus, Rens Waters, Konstantin V. Getman , et al. · 2025

Aims . We investigate the James Webb Space Telescope (JWST) MIRI MRS gas molecular content of an externally irradiated Herbig disk, the F-type XUE 10 source, in the context of the eXtreme UV Environments (XUE) program. XUE 10 belongs to th…

The past, present and future of observations of externally irradiated disks Open

Megan Allen, Rossella Anania, Morten Andersen, Mari-Liis Aru, Giulia Ballabio , et al. · 2025

Recent years have seen a surge of interest in the community studying the effect of ultraviolet radiation environment, predominantly set by OB stars, on protoplanetary disc evolution and planet formation. This is important because a signifi…

Survey of Orion Disks with ALMA (SODA) Open

Sierk van Terwisga, A. Hacar · 2025

Magnetic disk winds in protoplanetary disks Open

Kundan Kadam, Eduard I. Vorobyov, Peter Woitke, Shantanu Basu, Sierk van Terwisga · 2025

Context. Canonically, a protoplanetary disk is thought to undergo (gravito-)viscous evolution wherein the angular momentum of the accreting material is transported outward. However, several lines of reasoning suggest that the turbulent vis…

The past, present and future of observations of externally irradiated disks Open

Planet formation environments collaboration, Megan Allen, Rossella Anania, Morten Andersen, Mari-Liis Aru , et al. · 2025

Recent years have seen a surge of interest in the community studying the effect of ultraviolet radiation environment, predominantly set by OB stars, on protoplanetary disc evolution and planet formation. This is important because a signifi…

Magnetic disk winds in protoplanetary disks: Description of the model and impact on global disk evolution Open

Kundan Kadam, Eduard I. Vorobyov, Peter Woitke, Shantanu Basu, Sierk van Terwisga · 2025

Canonically, a protoplanetary disk is thought to undergo (gravito-)viscous evolution, wherein the angular momentum of the accreting material is transported outwards. However, several lines of reasoning suggest that the turbulent viscosity …

A complete Herbig disk mass survey in Orion Open

L.M. Stapper, M. R. Hogerheijde, E. F. van Dishoeck, Alice S. Booth, Steven L. Grant , et al. · 2024

Context. Disks around intermediate mass stars called Herbig disks are the formation sites of giant exoplanets. Obtaining a complete inventory of these disks will therefore give insights into giant planet formation. However, to date no comp…

A complete Herbig disk mass survey in Orion Open

L. M. Stapper, M. R. Hogerheijde, E. F. van Dishoeck, A. S. Booth, Steven L. Grant , et al. · 2024

Disks around intermediate mass stars called Herbig disks are the formation sites of giant exoplanets. Obtaining a complete inventory of these disks will therefore give insights into giant planet formation. However, until now no complete di…

Survey of Orion Disks with ALMA (SODA) III: Disks in wide binary systems in L1641 and L1647 Open

Giulia Ricciardi, Sierk van Terwisga, V. Roccatagliata, A. Hacar, Thomas Henning , et al. · 2024

Aims. The goal of this work is to comprehensively characterize the impact of stellar multiplicity on Class II disks in the L1641 and L1647 regions of Orion A (~1-3 Myr), part of the Survey of Orion Disks with ALMA (SODA). We characterize t…

Identification of a turnover in the initial mass function of a young stellar cluster down to 0.5 MJ Open

Matthew De Furio, Michael R. Meyer, Thomas P. Greene, K. W. Hodapp, Doug Johnstone , et al. · 2024

We present results exploring the initial mass function in a young (< 1 Myr) embedded star-forming region, NGC 2024, down to sub-Jupiter masses using the Near Infrared Camera (NIRCam) on the James Webb Space Telescope (JWST). Predominant st…

Identification of a turnover in the initial mass function of a young stellar cluster down to 0.5 M$_{J}$ Open

Matthew De Furio, Michael R. Meyer, Thomas P. Greene, K. W. Hodapp, Doug Johnstone , et al. · 2024

A successful theory of star formation should predict the number of objects as a function of their mass produced through star-forming events. Previous studies in star-forming regions and the solar neighborhood identify a mass function incre…

PRODIGE -- Planet-forming disks in Taurus with NOEMA Open

Riccardo Franceschi, Th. Henning, Grigorii V. Smirnov-Pinchukov, D. Semenov, Kamber R. Schwarz , et al. · 2024

We aim to constrain the gas density and temperature distributions as well as gas masses in several T Tauri protoplanetary disks located in Taurus. We use the 12CO, 13CO, and C18O (2-1) isotopologue emission observed at 0.9 with the IRAM NO…

PRODIGE – planet-forming disks in Taurus with NOEMA Open

D. Semenov, Th. Henning, S. Guilloteau, Grigorii V. Smirnov-Pinchukov, A. Dutrey , et al. · 2024

Context . The physics and chemistry of planet-forming disks are far from being fully understood. To make further progress, both broad line surveys and observations of individual tracers in a statistically significant number of disks are re…

A dusty streamer infalling onto the disk of a class I protostar. ALMA dual-band constraints on grain properties and mass infall rate Open

Luca Cacciapuoti, Enrique Macías, Aashish Gupta, L. Testi, A. Miotello , et al. · 2023

Observations of interstellar material infalling onto star- and planet-forming systems have become increasingly common thanks to recent advancements in radio interferometry. These structures replenish disks with fresh material, have the pot…

X-ray, Near-Ultraviolet, and Optical Flares Produced By Colliding Magnetospheres in The Young High-Eccentricity Binary DQ Tau Open

Konstantin V. Getman, Á. Kóspál, Nicole Arulanantham, D. Semenov, Grigorii V. Smirnov-Pinchukov , et al. · 2023

DQ Tau is a unique young high-eccentricity binary system that exhibits regular magnetic reconnection flares and pulsed accretion near periastron. We conducted NuSTAR, Swift, and Chandra observations during the July 30, 2022 periastron to c…

XUE. Molecular inventory in the inner region of an extremely irradiated Protoplanetary Disk Open

M. C. Ramírez-Tannus, Arjan Bik, Lars Cuijpers, Rens Waters, Christiane Goppl , et al. · 2023

We present the first results of the eXtreme UV Environments (XUE) James Webb Space Telescope (JWST) program, that focuses on the characterization of planet forming disks in massive star forming regions. These regions are likely representat…

Survey of Orion Disks with ALMA (SODA) Open

Sierk van Terwisga, A. Hacar · 2023

Context. External far-ultraviolet (FUV) irradiation of protoplanetary disks has an important impact on their evolution and ability to form planets. However, nearby (< 300 pc) star-forming regions lack sufficiently massive young stars, whil…

Survey of Orion Disks with ALMA (SODA) II: UV-driven disk mass loss in L1641 and L1647 Open

Sierk van Terwisga, A. Hacar · 2023

External FUV irradiation of protoplanetary disks has an important impact on their evolution and ability to form planets. However, nearby (10^4\,G_0$) destroy disks too quickly to study this process in detail. We study disk mass loss driven…

Machine learning-accelerated chemistry modeling of protoplanetary disks Open

Grigorii V. Smirnov-Pinchukov, Tamara Molyarova, D. Semenov, Vitaly Akimkin, Sierk van Terwisga , et al. · 2022

Aims. With the large amount of molecular emission data from (sub)millimeter observatories and incoming James Webb Space Telescope infrared spectroscopy, access to fast forward models of the chemical composition of protoplanetary disks is o…

Machine learning-accelerated chemistry modeling of protoplanetary disks Open

Grigorii V. Smirnov-Pinchukov, Tamara Molyarova, D. Semenov, Vitaly Akimkin, Sierk van Terwisga , et al. · 2022

Aims. With the large amount of molecular emission data from (sub)millimeter observatories and incoming James Webb Space Telescope infrared spectroscopy, access to fast forward models of the chemical composition of protoplanetary disks is o…

Protoplanetary disk mass loss near O- and B-type stars: an empirical view Open

Sierk van Terwisga, A. Hacar · 2022

The ability of protoplanetary disks to form planets depends on the evolution of their bulk (dust) mass reservoir. Surveys of nearby star-forming regions have revealed that there is a time dependence on the disk dust mass. In diffe…

High-resolution ALMA observations of transition disk candidates in Lupus Open

Nienke van der Marel, Jonathan P. Williams, Giovanni Picogna, Sierk van Terwisga, Stefano Facchini , et al. · 2022

Transition disks with small inner dust cavities are interesting targets for the study of disk clearing mechanisms. Such disks have been identified through a deficit in the infrared part of their SED, but spatially resolved millimeter imagi…

The Young Binary DQ Tau Produces Another X-Ray Flare Near Periastron Open

Konstantin V. Getman, Vitaly Akimkin, Nicole Arulanantham, Á. Kóspál, D. Semenov , et al. · 2022

This work is part of a multi-wavelength program to study the effects of X-ray/UV/optical stellar radiation on the chemistry of the circumbinary disk around the young high-eccentricity binary DQ Tau. ALMA observations for near/around 2021 D…

Survey of Orion Disks with ALMA (SODA) Open

Sierk van Terwisga, A. Hacar, E. F. van Dishoeck, Raymond Oonk, Simon Portegies Zwart · 2022

Context. Surveys of protoplanetary disks in nearby star-forming regions (SFRs) have provided important information on their demographics. However, due to their sample sizes, these surveys cannot be used to study how disk properties vary wi…

Survey of Orion Disks with ALMA (SODA) I: Cloud-level demographics of 873 protoplanetary disks Open

Sierk van Terwisga, A. Hacar, E. F. van Dishoeck · 2022

(Abridged) Surveys of protoplanetary disks in nearby star-forming regions (SFRs) have provided important information on their demographics, but due to their sample sizes, they cannot be used to study how disk properties vary with the envir…

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