Eugene Serabyn
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View article: A JWST/MIRI view of ąppa,Andromedae b : Refining its mass, age, and physical parameters
A JWST/MIRI view of ąppa,Andromedae b : Refining its mass, age, and physical parameters Open
ąppa,And,b is a substellar companion with a mass near the planet--brown dwarf boundary orbiting a B9IV star at ∼50-$100$,au. Estimates of its age and mass vary, which has fueled a decade-long debate. Additionally, the atmospheric parameter…
View article: MIRI-JWST mid-infrared direct imaging of the debris disk of HD 106906
MIRI-JWST mid-infrared direct imaging of the debris disk of HD 106906 Open
Context . We report MIRI-JWST coronagraphic observations at 11.3 and 15.5 μm of the debris disk around the young star HD 106906. The wavelength range is sensitive to the thermal emission of the dust heated by the central star. Aims . The o…
View article: Technical description and performance of the phase II version of the Keck Planet Imager and Characterizer
Technical description and performance of the phase II version of the Keck Planet Imager and Characterizer Open
The Keck Planet Imager and Characterizer (KPIC) is a series of upgrades for the Keck II Adaptive Optics (AO) system and the NIRSPEC spectrograph to enable diffraction limited, high resolution (R>30000) spectroscopy of exoplanets and low ma…
View article: First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs
First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs Open
Context . The newly accessible mid-infrared (MIR) window offered by the James Webb Space Telescope (JWST) for exoplanet imaging is expected to provide valuable information to characterize their atmospheres. In particular, coronagraphs on b…
View article: First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs
First unambiguous detection of ammonia in the atmosphere of a planetary mass companion with JWST/MIRI coronagraphs Open
The newly accessible mid-infrared (MIR) window offered by the James Webb Space Telescope (JWST) for exoplanet imaging is expected to provide valuable information to characterize their atmospheres. In particular, coronagraphs on board the J…
View article: Stellar Coronagraphy
Stellar Coronagraphy Open
Detecting exoplanets and other faint sources of emitted and reflected light near a bright star requires deeply suppressing the starlight while efficiently transmitting the dim light from its surroundings. This suppression can be carried ou…
View article: The Palomar twilight survey of 'Ayló'chaxnim, Atiras, and comets
The Palomar twilight survey of 'Ayló'chaxnim, Atiras, and comets Open
Near-sun sky twilight observations allow for the detection of asteroid interior to the orbit of Venus (Aylos), the Earth (Atiras), and comets. We present the results of observations with the Palomar 48-inch telescope (P48)/Zwicky Transient…
View article: A new atmospheric characterization of the sub-stellar companion HR\,2562\,B with JWST/MIRI observations
A new atmospheric characterization of the sub-stellar companion HR\,2562\,B with JWST/MIRI observations Open
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 provides insight into the evolution of young objects in the L/T …
View article: Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI
Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI Open
Mid-infrared imaging of exoplanets and disks is now possible with the coronagraphs of the MIRI on the JWST. This wavelength range unveils new features of young directly imaged systems and allows us to obtain new constraints for characteriz…
View article: Design and prototyping of broadband metasurface scalar phase masks for high-contrast imaging
Design and prototyping of broadband metasurface scalar phase masks for high-contrast imaging Open
editorial reviewed
View article: Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI
Unveiling the HD 95086 system at mid-infrared wavelengths with JWST/MIRI Open
Context . Mid-infrared imaging of exoplanets and disks is now possible with the coronographs of the Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST). This wavelength range unveils new features of young directly image…
View article: A Survey of Protoplanetary Disks Using the Keck/NIRC2 Vortex Coronagraph
A Survey of Protoplanetary Disks Using the Keck/NIRC2 Vortex Coronagraph Open
Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations of protoplanetary disks in the millimeter continuum have shown a variety of radial gaps, cavities, and spiral features. These substructures may be signposts for ongoin…
View article: A Survey of Protoplanetary Disks Using the Keck/NIRC2 Vortex Coronagraph
A Survey of Protoplanetary Disks Using the Keck/NIRC2 Vortex Coronagraph Open
Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations of protoplanetary disks in the millimeter continuum have shown a variety of radial gaps, cavities, and spiral features. These substructures may be signposts for ongoin…
View article: Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy
Gliese 12 b: A Temperate Earth-sized Planet at 12 pc Ideal for Atmospheric Transmission Spectroscopy Open
Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres of terrestrial planets via follow-up spectroscopic observations. However, the number of such planets receiving low i…
View article: Geometric-phase-based phase-knife mask for stellar nulling and coronagraphy
Geometric-phase-based phase-knife mask for stellar nulling and coronagraphy Open
Exoplanets can be detected very close to stars using single-mode cross-aperture nulling interferometry, a photonic technique that relies on the inability of an anti-symmetric stellar point-spread function to couple to the symmetric mode of…
View article: Direct Detection and Characterization of Exoplanets Using Imaging Fourier Transform Spectroscopy
Direct Detection and Characterization of Exoplanets Using Imaging Fourier Transform Spectroscopy Open
Space-based direct imaging provides prospects for detection and spectral characterization of exoplanets at optical and near-infrared wavelengths. Integral field spectrographs (IFS) have been historically baselined for these mission concept…
View article: Current laboratory performance of starlight suppression systems, and potential pathways to desired Habitable Worlds Observatory exoplanet science capabilities
Current laboratory performance of starlight suppression systems, and potential pathways to desired Habitable Worlds Observatory exoplanet science capabilities Open
We summarize the current best polychromatic (10 to 20 % bandwidth) contrast performance demonstrated in the laboratory by different starlight suppression approaches and systems designed to directly characterize exoplanets around nearby sta…
View article: Imaging detection of the inner dust belt and the four exoplanets in the HR 8799 system with JWST’s MIRI coronagraph
Imaging detection of the inner dust belt and the four exoplanets in the HR 8799 system with JWST’s MIRI coronagraph Open
Context . The MIRI instrument on board JWST is now offering high-contrast imaging capacity at mid-IR wavelengths, thereby opening a completely new field of investigation for characterizing young exoplanetary systems. Aims . The multiplanet…
View article: Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319
Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319 Open
Vortex fiber nulling (VFN) is a technique for detecting and characterizing faint companions at small separations from their host star. A near-infrared (∼2.3 μ m) VFN demonstrator mode was deployed on the Keck Planet Imager and Characterize…
View article: Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319
Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319 Open
Vortex fiber nulling (VFN) is a technique for detecting and characterizing faint companions at small separations from their host star. A near-infrared ($\sim2.3 μ$m) VFN demonstrator mode was deployed on the Keck Planet Imager and Characte…
View article: Direct detection and characterization of exoplanets using imaging Fourier transform spectroscopy
Direct detection and characterization of exoplanets using imaging Fourier transform spectroscopy Open
Space-based direct imaging provides prospects for detection and spectral characterization of exoplanets at optical and near-infrared wavelengths. Integral field spectrographs (IFS) have been historically baselined for these mission concept…
View article: Imaging detection of the inner dust belt and the four exoplanets in the HR8799 system with JWST's MIRI coronagraph
Imaging detection of the inner dust belt and the four exoplanets in the HR8799 system with JWST's MIRI coronagraph Open
The multi planet system HR8799 is the first target observed with MIRI's coronagraphs as part of the MIRI-EC Guaranteed Time Observations exoplanets programme in Nov. 2022. We obtained deep observations in three coronagraphic filters from 1…
View article: Vortex fiber nulling for exoplanet observations: implementation and first light
Vortex fiber nulling for exoplanet observations: implementation and first light Open
Vortex fiber nulling (VFN) is a single-aperture interferometric technique for detecting and characterizing exoplanets separated from their host star by less than a diffracted beam width. VFN uses a vortex mask and single mode fiber to sele…
View article: Benefits of adding radial phase dimples on scalar coronagraph phase masks
Benefits of adding radial phase dimples on scalar coronagraph phase masks Open
Current scalar coronagraph focal plane mask designs are performance-limited by chromaticity. We investigate the effects of adding central Roddier and dual zone phase dimples to scalar vortex masks to improve broadband performance by suppre…
View article: Laboratory demonstration of the wrapped staircase scalar vortex coronagraph
Laboratory demonstration of the wrapped staircase scalar vortex coronagraph Open
Of the over 5000 exoplanets that have been detected, only about a dozen have\never been directly imaged. Earth-like exoplanets are on the order of 10 billion\ntimes fainter than their host star in visible and near-infrared, requiring a\nco…