7 papers
Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of Cen A. I. Observations, Orbital and Physical Properties, and Exozodi Upper Limits
Charles Beichman, Aniket Sanghi, Dimitri Mawet +27
We report on coronagraphic observations of the nearest solar-type star, Cen A, using the MIRI instrument on the James Webb Space Telescope. With three epochs of observation (A…
Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of Cen A. II. Binary Star Modeling, Planet and Exozodi Search, and Sensitivity Analysis
Aniket Sanghi, Charles Beichman, Dimitri Mawet +14
JWST observed our closest solar twin, Cen A, with the MIRI coronagraph in F1550C (15.5 m) at three distinct epochs between August 2024 and April 2025. For the first time w…
ESCAPE project: testing active observing strategies for high-contrast imaging in space on the HiCAT testbed
Alexis Lau, Ãlodie Choquet, Lisa Altinier +6
The Roman Space Telescope will be a critical mission to demonstrate high-contrast imaging technologies allowing for the characterisation of exoplanets in reflected light. It will d…
ESCAPE project. CAPyBARA: a Roman Coronagraph simulator for post-processing methods development
Lisa Altinier, Ãlodie Choquet, Arthur Vigan +2
The Roman Coronagraph Instrument will be the first space facility equipped with deformable mirrors (DMs). These will lead to reach a contrast of or better in a dark hole…
A new atmospheric characterization of the sub-stellar companion HR\,2562\,B with JWST/MIRI observations
Nicolás Godoy, Elodie Choquet, Eugene Serabyn +8
Context: HR2562B is a planetary-mass companion located 0.56arcsec (19au) from its host star. It is one of a few L/T transitional objects orbiting a young star. This companion provi…
ESCAPE project: fundamental detection limits of JWST/NIRCam coronographic observations
N. Godoy, E. Choquet, L. Altinier +4
In this study, we explored the fundamental contrast limit of NIRCam coronagraphy observations, representing the achievable performance with post-processing techniques. This limit i…