Explanipedia

Revealing the Accelerating Wind in the Inner Region of Colliding-wind Binary WR 112 Open

John D. Monnier, Yinuo Han, M. F. Corcoran, Sanne Bloot, J. R. Callingham , et al. · 2025

Colliding winds in massive binaries generate X-ray-bright shocks, synchrotron radio emission, and sometimes even dusty “pinwheel” spirals. We report the first X-ray detections of the dusty WC+O binary system WR 112 from Chandra and Swift, …

The James Webb Interferometer: Space-based Interferometric Detections of PDS 70 b and c at 4.8 <i>μ</i> m Open

Dori Blakely, Doug Johnstone, Gabriele Cugno, Anand Sivaramakrishnan, Peter Tuthill , et al. · 2025

We observed the planet-hosting system PDS 70 with the James Webb Interferometer, JWST's aperture masking interferometric mode within NIRISS. Observing with the F480M filter centered at 4.8 μ m, we simultaneously fit geometrical models to t…

Dynamic Imprints of Colliding-wind Dust Formation from WR 140 Open

Emma P. Lieb, Ryan M. Lau, Jennifer L. Hoffman, M. F. Corcoran, M. García-Marín , et al. · 2025

Carbon-rich Wolf–Rayet (WR) binaries are a prominent source of carbonaceous dust that contribute to the dust budget of galaxies. The “textbook” example of an episodic dust-producing WR binary, WR 140 (HD 193793), provides us with an ideal …

The cool brown dwarf Gliese 229 B is a close binary Open

Jerry W. Xuan, A. Mérand, William Thompson, Yapeng Zhang, S. Lacour , et al. · 2024

The interplay between disk wind and magnetospheric accretion mechanisms in the innermost environment of RU Lup Open

J. A. Wojtczak, B. Tessore, Lucas Labadie, K. Perraut, J. Bouvier , et al. · 2024

Context. Hydrogen recombination lines such as Br γ are tracers of hot gas within the inner circumstellar disk of young stellar objects (YSOs). In the relatively cool innermost environment of T Tauri stars specifically, Br γ emission is clo…

The GRAVITY young stellar object survey Open

H. Nowacki, Karine Perraut, Lucas Labadie, J. Bouvier, C. Dougados , et al. · 2024

Context. The dust- and gas-rich protoplanetary disks around young stellar systems play a key role in star and planet formation. While considerable progress has recently been made in probing these disks on large scales of a few tens of astr…

The interplay between disk wind and magnetospheric accretion mechanisms in the innermost environment of RU Lup Open

J. A. Wojtczak, B. Tessore, Lucas Labadie, K. Perraut, J. Bouvier , et al. · 2024

Aims: Our aim is to build upon the analysis presented in our previous work by attempting to match the observational data obtained with VLTI GRAVITY for RU Lup in 2021 with an expanded radiative transfer model of Br$γ$ emission. Specificall…

The James Webb Interferometer: Space-based interferometric detections of PDS 70 b and c at 4.8 $μ$m Open

Dori Blakely, Doug Johnstone, Gabriele Cugno, Anand Sivaramakrishnan, Peter Tuthill , et al. · 2024

We observed the planet-hosting system PDS 70 with the James Webb Interferometer, JWST's Aperture Masking Interferometric (AMI) mode within NIRISS. Observing with the F480M filter centered at 4.8 $μ$m, we simultaneously fit geometrical mode…

A First Look with JWST Aperture Masking Interferometry: Resolving Circumstellar Dust around the Wolf–Rayet Binary WR 137 beyond the Rayleigh Limit Open

Ryan M. Lau, M. Hankins, J. Sánchez-Bermúdez, Deepashri Thatte, A. Soulain , et al. · 2024

We present infrared aperture-masking interferometry (AMI) observations of newly formed dust from the colliding winds of the massive binary Wolf–Rayet system WR 137 with JWST using the Near Infrared Imager and Slitless Spectrograph (NIRISS)…

The GRAVITY young stellar object survey Open

Y.-I. Bouarour, R. García López, J. Sánchez-Bermúdez, A. Caratti o Garatti, K. Perraut , et al. · 2024

Aims . We aim to investigate the origin of the HI Br γ emission in young stars by using GRAVITY to image the innermost region of circumstellar disks, where important physical processes such as accretion and winds occur. With high spectral …

The GRAVITY young stellar object survey XIII. Tracing the time-variable asymmetric disk structure in the inner AU of the Herbig star HD98922 Open

GRAVITY Collaboration, V. Ganci, Lucas Labadie, K. Perraut, A. Wojtczak , et al. · 2024

Temporal variability in the photometric and spectroscopic properties of protoplanetary disks is common in YSO. However, evidence pointing toward changes in their morphology over short timescales has only been found for a few sources, mainl…

The GRAVITY young stellar object survey Open

V. Ganci, Lucas Labadie, K. Perraut, A. Wojtczak, J. Kaufhold , et al. · 2024

Context . Temporal variability in the photometric and spectroscopic properties of protoplanetary disks is common in young stellar objects. However, evidence pointing toward changes in their morphology over short timescales has only been fo…

The GRAVITY young stellar object survey Open

R. García López, A. Natta, R. Fedriani, A. Caratti o Garatti, J. Sánchez-Bermúdez , et al. · 2024

Context . The region of protoplanetary disks closest to a star (within 1–2 au) is shaped by a number of different processes, from accretion of the disk material onto the central star to ejection in the form of winds and jets. Optical and n…

The GRAVITY young stellar object survey XII. The hot gas disk component in Herbig Ae/Be stars Open

GRAVITY Collaboration, R. García López, A. Natta, R. Fedriani, A. Caratti o Garatti , et al. · 2024

The region of protoplanetary disks closest to a star (within 1-2\,au) is shaped by a number of different processes, from accretion of the disk material onto the central star to ejection in the form of winds and jets. Optical and near-IR em…

The GRAVITY young stellar object survey: XI. Imaging the hot gas emission around the Herbig Ae star HD 58647 Open

Y.-I. Bouarour, R. García López, J. Sánchez-Bermúdez, A. Caratti o Garatti, K. Perraut , et al. · 2023

We aim to investigate the origin of the HI Br$γ$ emission in young stars by using GRAVITY to image the innermost region of circumstellar disks, where important physical processes such as accretion and winds occur. With high spectral and an…

A First Look with JWST Aperture Masking Interferometry (AMI): Resolving Circumstellar Dust around the Wolf-Rayet Binary WR 137 beyond the Rayleigh Limit Open

Ryan M. Lau, M. Hankins, J. Sánchez-Bermúdez, Deepashri Thatte, A. Soulain , et al. · 2023

We present infrared aperture masking interferometry (AMI) observations of newly formed dust from the colliding winds of the massive binary system Wolf-Rayet (WR) 137 with JWST using the Near Infrared Imager and Slitless Spectrograph (NIRIS…

The GRAVITY young stellar object survey Open

A. Soulain, K. Perraut, J. Bouvier, G. Pantolmos, A. Caratti o Garatti , et al. · 2023

Context. T Tauri stars are known to be the cradle of planet formation. Most exoplanets discovered to date lie at the very inner part of the circumstellar disk (<1 au). The innermost scale of young stellar objects is therefore a compelling …

The GRAVITY young stellar object survey -- XI. Probing the inner disk and magnetospheric accretion region of CI Tau Open

GRAVITY Collaboration, A. Soulain, K. Perraut, J. Bouvier, G. Pantolmos , et al. · 2023

Aims: We aim at spatially and spectrally resolving the innermost scale of the young stellar object CI Tau to constrain the inner disk properties and better understand the magnetospheric accretion phenomenon. Methods: The high sensitivity o…

Spectroscopic and interferometric signatures of magnetospheric accretion in young stars Open

B. Tessore, A. Soulain, G. Pantolmos, J. Bouvier, C. Pinte , et al. · 2023

Aims. We aim to assess the complementarity between spectroscopic and interferometric observations in the characterisation of the inner star-disc interaction region of young stars. Methods. We used the MCFOST code to solve the non-local the…

The GRAVITY young stellar object survey Open

J. A. Wojtczak, Lucas Labadie, K. Perraut, B. Tessore, A. Soulain , et al. · 2022

Context. Hot atomic hydrogen emission lines in pre-main sequence stars serve as tracers for physical processes in the innermost regions of circumstellar accretion disks, where the interaction between a star and disk is the dominant influen…

The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope -- IV. Aperture Masking Interferometry Open

Anand Sivaramakrishnan, Peter Tuthill, James P. Lloyd, Alexandra Z. Greenbaum, Deepashri Thatte , et al. · 2022

The James Webb Space Telescope's Near Infrared Imager and Slitless Spectrograph (JWST-NIRISS) flies a 7-hole non-redundant mask (NRM), the first such interferometer in space, operating at 3-5 \micron~wavelengths, and a bright limit of $\si…

The GRAVITY Young Stellar Object survey -- IX. Spatially resolved\n kinematics of hot hydrogen gas in the star/disk interaction region of T Tauri\n stars Open

J. A. Wojtczak, Lucas Labadie, K. Perraut, B. Tessore, A. Soulain , et al. · 2022

Aims: We aim to spatially and spectrally resolve the Br-gamma hydrogen\nemission line with the methods of interferometry in order to examine the\nkinematics of the hydrogen gas emission region in the inner accretion disk of a\nsample of so…

Smoke on the wind: dust nucleation in the archetype colliding-wind pinwheel WR 104 Open

A. Soulain, A. Lamberts, F. Millour, Peter Tuthill, Ryan M. Lau · 2022

A handful of binary Wolf–Rayet stars are known to harbour spectacular spiral structures spanning a few hundred astronomical units. These systems host some of the highest dust production rates in the Universe and are therefore interesting c…

Nested dust shells around the Wolf–Rayet binary WR 140 observed with JWST Open

Ryan M. Lau, M. Hankins, Yinuo Han, Ioannis Argyriou, M. F. Corcoran , et al. · 2022

Radiation-driven acceleration in the expanding WR140 dust shell Open

Yinuo Han, Peter Tuthill, Ryan M. Lau, A. Soulain · 2022

Locating dust and molecules in the inner circumstellar environment of R Sculptoris with MATISSE Open

J. Drevon, F. Millour, P. Cruzalèbes, C. Paladini, J. Hron , et al. · 2022

Context. Asymptotic giant branch (AGB) stars are one of the main sources of dust production in the Galaxy. However, it is not yet clear what this process looks like and where the dust happens to be condensing in the circumstellar environme…

Two Rings and a Marginally Resolved, 5 au Disk around LkCa 15 Identified via Near-infrared Sparse Aperture Masking Interferometry Open

Dori Blakely, Logan Francis, Doug Johnstone, A. Soulain, Peter Tuthill , et al. · 2022

Sparse aperture masking interferometry (SAM) is a high-resolution observing technique that allows for imaging at and beyond a telescope’s diffraction limit. The technique is ideal for searching for stellar companions at small separations f…

Two Rings and a Marginally Resolved, 5 AU, Disk Around LkCa 15\n Identified Via Near Infrared Sparse Aperture Masking Interferometry Open

Dori Blakely, Logan Francis, Doug Johnstone, A. Soulain, Peter Tuthill , et al. · 2022

Sparse aperture masking interferometry (SAM) is a high resolution observing\ntechnique that allows for imaging at and beyond a telescope's diffraction\nlimit. The technique is ideal for searching for stellar companions at small\nseparation…

Thermal imaging of dust hiding the black hole in NGC 1068 Open

V. Gámez Rosas, J. W. Isbell, Walter Jaffe, R. Petrov, J. Leftley , et al. · 2022

Thermal imaging of dust hiding the black hole in the Active Galaxy NGC 1068 Open

V. Gámez Rosas, J. W. Isbell, Walter Jaffe, R. Petrov, J. Leftley , et al. · 2021

In the widely accepted 'Unified Model' solution of the classification puzzle of Active Galactic Nuclei, the orientation of a dusty accretion torus around the central black hole dominates their appearance. In 'type-1' systems, the bright nu…

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