Explanipedia

Keplerian motion of a compact source orbiting the inner disc of PDS 70: a third protoplanet in resonance with b and c? Open

Iain Hammond, Valentin Christiaens, Daniel J. Price, Dori Blakely, David Trevascus , et al. · 2025

The disc around PDS 70 hosts two directly imaged protoplanets in a gap. Previous VLT/SPHERE and recent JWST/NIRCam observations have hinted at the presence of a third compact source in the same gap at $\sim$13 au, interior to the orbit of …

On the Orbit of the Binary Brown Dwarf Companion GL229 Ba and Bb Open

William Thompson, Dori Blakely, Jerry W. Xuan, Alexandre Bouchard‐Côté, Guillaume Bourdarot , et al. · 2025

The companion GL229B was recently resolved by Xuan et al. as a tight binary of two brown dwarfs (Ba and Bb) through VLTI-GRAVITY interferometry and Very Large Telescope-CRIRES+ radial velocity (RV) measurements. Here, we present Bayesian m…

A Tentative Detection of a Point Source in the Disk Gap of HD 100546 with VLT/SPHERE-IRDIS Sparse Aperture Masking Interferometry* Open

Dori Blakely, Doug Johnstone, T. Stolker, M. Benisty, Jens Kammerer , et al. · 2025

We reanalyze VLT/SPHERE-IRDIS K- and H -band sparse aperture masking interferometry data of the transition disk HD 100546 observed in 2018 and 2021, respectively. We fit geometrical models to the closure phases extracted from both datasets…

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…

A Tentative Detection of a Point Source in the Disk Gap of HD 100546 with VLT/SPHERE-IRDIS Sparse Aperture Masking Interferometry Open

Dori Blakely, Doug Johnstone, T. Stolker, M. Benisty, Jens Kammerer , et al. · 2025

We re-analyze VLT/SPHERE-IRDIS K and H-band sparse aperture masking interferometry data of the transition disk HD 100546 observed in 2018 and 2021, respectively. We fit geometrical models to the closure phases extracted from both datasets.…

On the Orbit of the Binary Brown Dwarf Companion GL229 Ba and Bb Open

William Thompson, Dori Blakely, Jerry W. Xuan, Alexandre Bouchard‐Côté, Guillaume Bourdarot , et al. · 2025

The companion GL229B was recently resolved by Xuan et al. (2024) as a tight binary of two brown dwarfs (Ba and Bb) through VLTI-GRAVITY interferometry and VLT-CRIRES+ RV measurements. Here, we present Bayesian models of the interferometric…

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 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…

Searching for low-mass companions at small separations in transition disks with aperture masking interferometry Open

T. Stolker, Jens Kammerer, M. Benisty, Dori Blakely, Doug Johnstone , et al. · 2023

Transition disks have large central cavities that have been spatially resolved during recent years. Cavities and other substructures in circumstellar disks are often interpreted as signposts to massive companions. We aim to search for stel…

Searching for low-mass companions at small separations in transition disks with aperture masking interferometry Open

T. Stolker, Jens Kammerer, M. Benisty, Dori Blakely, Doug Johnstone , et al. · 2023

Context . Transition disks have large central cavities that have been resolved by imaging surveys during recent years. Cavities and other substructures in circumstellar disks are often interpreted as signposts to massive companions. Detect…

Octofitter: Fast, Flexible, and Accurate Orbit Modeling to Detect Exoplanets Open

William Thompson, Jensen Lawrence, Dori Blakely, Christian Marois, Jason Wang , et al. · 2023

As next-generation imaging instruments and interferometers search for planets closer to their stars, they must contend with increasing orbital motion and longer integration times. These compounding effects make it difficult to detect faint…

The Near Infrared Imager and Slitless Spectrograph for JWST. V. Kernel Phase Imaging and Data Analysis Open

Jens Kammerer, Rachel Cooper, Thomas Vandal, Deepashri Thatte, Frantz Martinache , et al. · 2023

Kernel phase imaging (KPI) enables the direct detection of substellar companions and circumstellar dust close to and below the classical (Rayleigh) diffraction limit. The high-Strehl full pupil images provided by the James Webb Space Teles…

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 Near Infrared Imager and Slitless Spectrograph for JWST -- V. Kernel Phase Imaging and Data Analysis Open

Jens Kammerer, Rachel Cooper, Thomas Vandal, Deepashri Thatte, Frantz Martinache , et al. · 2022

Kernel phase imaging (KPI) enables the direct detection of substellar companions and circumstellar dust close to and below the classical (Rayleigh) diffraction limit. We present a kernel phase analysis of JWST NIRISS full pupil images take…

The Origin of the Doppler Flip in HD 100546: A Large-scale Spiral Arm Generated by an Inner Binary Companion Open

Brodie J. Norfolk, C. Pinte, Josh Calcino, Iain Hammond, Nienke van der Marel , et al. · 2022

Companions at subarcsecond separation from young stars are difficult to image. However, their presence can be inferred from the perturbations they create in the dust and gas of protoplanetary disks. Here we present a new interpretation of …

The Origin of the Doppler-flip in HD 100546: a large scale spiral arm generated by an inner binary companion Open

Brodie J. Norfolk, C. Pinte, Josh Calcino, Iain Hammond, Nienke van der Marel , et al. · 2022

Companions at sub-arcsecond separation from young stars are difficult to image. However their presence can be inferred from the perturbations they create in the dust and gas of protoplanetary disks. Here we present a new interpretation of …

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…

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