K. Lawson

A Misaligned Debris Disk relative to the Host Star CPD-72 2713 from JWST/NIRCam Imaging

Jingwen Zhang, Maxwell A. Millar-Blanchaer, Kellen Lawson +17

Observations of debris disks provide a valuable window to investigate the formation and evolution of planetary systems. We present high-contrast JWST/NIRCam observations of CPD-72…

The JWST Sub-Jupiters Survey: Direct Imaging Discovery of a Giant Planet and a Debris Disk Around the Young M-dwarf RX J0534.0-0221

Rodrigo Ferrer-Chavez, Jason J. Wang, Kevin Wagner +47

We present the discovery of RX J0534.0-0221 b, a giant planet orbiting an M-dwarf star in the $β$ Pictoris moving group. RX J0534 was originally observed with JWST/NIRCam in the F4…

JWST/MIRI Imaging Search for Kinematically Detected Protoplanetary Candidates

G. Cugno, M. Benisty, R. Teague +32

Kinematic perturbations observed with ALMA in CO line emission provide evidence for a population of embedded giant protoplanets shaping the structure of protoplanetary disks. We pr…

JWST/NIRCam Imaging of Young Stellar Objects. IV. Detailed Imaging of the Protoplanetary Disk around TW Hya

Yu-Chia Lin, Jarron Leisenring, Schuyler G. Wolff +14

As the nearest protoplanetary disk to Earth ( $d = 60.14$ pc), TW Hya is one of the most studied protoplanetary disks and a critical benchmark for testing planet formation theories.…

The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems VIII: patchy forsterite and enstatite clouds in the atmosphere of VHS 1256 b, retrieval lessons learned and outlook to the future

Niall Whiteford, Jacqueline K. Faherty, Ben Burningham +123

JWST defines a new era for the data-driven approach of retrieval modelling, which has become a cornerstone tool for the statistical inference of exoplanetary and brown dwarf proper…

JWST NIRCam Reveals the Largest Known M-dwarf Debris Disk Around TWA 10 and New Scattered-Light Observations of the TWA 25 Debris Disk

Katie A. Crotts, Aarynn L. Carter, Beth Biller +26

We present JWST NIRCam observations of two M-dwarf systems located in the TW Hydra association, TWA 10 and TWA 25. Both systems harbor detected debris disks in the F200W and F444W…

astro-ph.EP2026★ 1 cited

Direct Images of CO2 Absorption in the Atmosphere of a Super-Jupiter: Enhanced Metallicity Suggestive of Formation in a Disk

William O. Balmer, Laurent Pueyo, Ashley Messier +15

It is unclear how directly imaged substellar companions with masses near the deuterium burning limit form, because these objects are rare and their bulk properties are not diagnost…

Time-variable Scattered Light in Herbig Disks Observed with Subaru/SCExAO

Camryn Mullin, Miles Lucas, Ruobing Dong +12

Using the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument, we present near-infrared K-band polarimetric imaging of nine Herbig stars selected from a volume-limited…

JWST/NIRCam observations of HD~92945 debris disk: An asymmetric disk with a gap

C. Lazzoni, R. Bendahan-West, S. Marino +9

We present the first observations of the HD92945 debris disk obtained with JWST, targeting this nearby K0V star located at 21.54 pc from the Sun. High-contrast coronagraphic imagin…

Discovery of a Debris Disk Around TWA 20

Skyler Palatnick, Maxwell A. Millar-Blanchaer, Jingwen Zhang +20

We report the discovery of a debris disk surrounding the M3 star, TWA 20, revealed by JWST coronagraphic observations using the Near-infrared Camera (NIRCam). With reference-star d…

Follow-Up Exploration of the TWA 7 Planet-Disk System with JWST NIRCam

Katie A. Crotts, Aarynn L. Carter, Kellen Lawson +39

The young M-star TWA 7 hosts a bright and near face-on debris disk, which has been imaged from the optical to the submillimeter. The disk displays multiple complex substructures su…

astro-ph.EP2025★ 22 cited

Probing the Outskirts of M Dwarf Planetary Systems with a Cycle 1 JWST NIRCam Coronagraphy Survey

Ellis Bogat, Joshua E. Schlieder, Kellen D. Lawson +18

The population of giant planets on wide orbits around low-mass M dwarf stars is poorly understood, but the unprecedented sensitivity of JWST NIRCam coronagraphic imaging now provid…

JWST-TST High Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO $_{2}$ in the HR 8799 and 51 Eri Exoplanets' Atmospheres

William O. Balmer, Jens Kammerer, Laurent Pueyo +19

High-contrast observations with JWST can reveal key composition and vertical mixing dependent absorption features in the spectra of directly imaged planets across the 3-5 $μ$ m wave…

SCExAO/CHARIS Near-Infrared Scattered-Light Imaging and Integral Field Spectropolarimetry of the AB Aurigae Protoplanetary System

Erica Dykes, Thayne Currie, Kellen Lawson +21

We analyze near-infrared integral field spectropolarimetry of the AB Aurigae protoplanetary disk and protoplanet (AB Aur b), obtained with SCExAO/CHARIS in 22 wavelength channels c…

Design, scientific goals, and performance of the SCExAO survey for planets around accelerating stars

Mona El Morsy, Thayne Currie, Masayuki Kuzuhara +25

We describe the motivation, design, and early results for our 42-night, 125 star Subaru/SCExAO direct imaging survey for planets around accelerating stars. Unlike prior large surve…

astro-ph.EP2024★ 18 cited

SCExAO/CHARIS Multi-Wavelength, High-Contrast Imaging of the BD+45 $^{\circ}$ 598 Debris Disk

Maria Vincent, Kellen Lawson, Thayne Currie +5

We present a multi-wavelength (1.16 $μ$ m-2.37 $μ$ m) view of the debris disk around BD+45 $^{\circ}$ 598, using the Subaru Coronagraphic Extreme Adaptive Optics system paired with the Cor…

JWST-TST High Contrast: JWST/NIRCam observations of the young giant planet $β$ Pic b

Jens Kammerer, Kellen Lawson, Marshall D. Perrin +14

We present the first JWST/NIRCam observations of the directly-imaged gas giant exoplanet $β$ Pic b. Observations in six filters using NIRCam's round coronagraphic masks provide a h…

JWST/NIRCam Detection of the Fomalhaut C Debris Disk in Scattered Light

Kellen Lawson, Joshua E. Schlieder, Jarron M. Leisenring +20

Observations of debris disks offer important insights into the formation and evolution of planetary systems. Though M dwarfs make up approximately 80% of nearby stars, very few M-d…

The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems V: Do Self-Consistent Atmospheric Models Represent JWST Spectra? A Showcase With VHS 1256 b

Simon Petrus, Niall Whiteford, Polychronis Patapis +119

The unprecedented medium-resolution (R~1500-3500) near- and mid-infrared (1-18um) spectrum provided by JWST for the young (140+/-20Myr) low-mass (12-20MJup) L-T transition (L7) com…

JWST-TST High Contrast: Asymmetries, dust populations and hints of a collision in the $β$ Pictoris disk with NIRCam and MIRI

Isabel Rebollido, Christopher C. Stark, Jens Kammerer +21

We present the first JWST MIRI and NIRCam observations of the prominent debris disk around Beta Pictoris. Coronagraphic observations in 8 filters spanning from 1.8 to 23~ $μ$ m provi…

The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems III: Aperture Masking Interferometric Observations of the star HIP 65426 at 3.8 um

Shrishmoy Ray, Steph Sallum, Sasha Hinkley +121

We present aperture masking interferometry (AMI) observations of the star HIP 65426 at $3.8 μ m$ as a part of the JWST Direct Imaging Early Release Science (ERS) program obtai…

The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems IV: NIRISS Aperture Masking Interferometry Performance and Lessons Learned

Steph Sallum, Shrishmoy Ray, Jens Kammerer +120

We present a performance analysis for the aperture masking interferometry (AMI) mode on board the James Webb Space Telescope Near Infrared Imager and Slitless Spectrograph (JWST/NI…

JWST/NIRCam Coronagraphy of the Young Planet-hosting Debris Disk AU Microscopii

Kellen Lawson, Joshua E. Schlieder, Jarron M. Leisenring +20

High-contrast imaging of debris disk systems permits us to assess the composition and size distribution of circumstellar dust, to probe recent dynamical histories, and to directly…