J. P. Pye
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View article: Evidence for SiO cloud nucleation in the rogue planet PSO J318
Evidence for SiO cloud nucleation in the rogue planet PSO J318 Open
Silicate clouds have long been known to significantly impact the spectra of late L-type brown dwarfs – with observable absorption features at ~10 μm. The James Webb Space Telescope (JWST) has reopened a window to the mid-infrared with unpr…
View article: Panchromatic characterization of the Y0 brown dwarf WISEP J173835.52+273258.9 using JWST/MIRI
Panchromatic characterization of the Y0 brown dwarf WISEP J173835.52+273258.9 using JWST/MIRI Open
Context . Cold brown dwarf atmospheres provide a good training ground for the analysis of atmospheres of temperate giant planets. WISEP J173835.52+273258.9 (WISE 1738) is an isolated cold brown dwarf and a Y0 spectral standard with a tempe…
View article: Detection of CO <sub>2</sub> , CO, and H <sub>2</sub> O in the atmosphere of the warm sub-Saturn HAT-P-12 b
Detection of CO <sub>2</sub> , CO, and H <sub>2</sub> O in the atmosphere of the warm sub-Saturn HAT-P-12 b Open
Context . The chemical composition of warm gas giant exoplanet atmospheres (with T eq < 1000 K) is not well known due to the lack of observational constraints. Aims . HAT-P-12 b is a warm, sub-Saturn-mass transiting exoplanet that is ideal…
View article: APIS II: Extension and Flight Testing of the Autonomous Persistent Intelligent Swarm Algorithm
APIS II: Extension and Flight Testing of the Autonomous Persistent Intelligent Swarm Algorithm Open
Multi-agent Cyber-Physical-Human (CPH) systems in realistic environments operate under uncertain conditions. Task inaccuracies, both in terms of exact location and exact priority, are to be expected. Furthermore, real-world deployment can …
View article: MIDIS: MIRI Uncovers Virgil, the First Little Red Dot with Clear Detection of Its Host Galaxy at <i>z</i> ≃ 6.6
MIDIS: MIRI Uncovers Virgil, the First Little Red Dot with Clear Detection of Its Host Galaxy at <i>z</i> ≃ 6.6 Open
We present Virgil, a Mid-Infrared Instrument (MIRI) extremely red object detected with the F1000W filter as part of the MIRI Deep Imaging Survey observations of the Hubble Ultra Deep Field. Virgil is an Ly α emitter (LAE) at z spec = 6.631…
View article: Spatially resolved H<i>α</i> emission in B14-65666: Compact starbursts, ionizing efficiency, and gas kinematics in an advanced merger at the Epoch of Reionization
Spatially resolved H<i>α</i> emission in B14-65666: Compact starbursts, ionizing efficiency, and gas kinematics in an advanced merger at the Epoch of Reionization Open
We present MIRI/JWST medium-resolution spectroscopy (MRS) and imaging (MIRIM) of B14-65666, a source identified as a Lyman-break and interacting galaxy at a redshift of z = 7.15. We detect the H α line emission in this system, revealing a …
View article: MIDIS
MIDIS Open
Context. Thanks to decades of observations using the Hubble Space Telescope (HST), the structure of galaxies at redshift z >2 has been widely studied in the rest-frame ultraviolet regime, which traces recent star formation from young stell…
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: MIRI-LRS Spectrum of a Cold Exoplanet around a White Dwarf: Water, Ammonia, and Methane Measurements
MIRI-LRS Spectrum of a Cold Exoplanet around a White Dwarf: Water, Ammonia, and Methane Measurements Open
The study of the atmosphere of exoplanets orbiting white dwarfs is a largely unexplored field. With WD 0806-661 b, we present the first deep dive into the atmospheric physics and chemistry of a cold exoplanet around a white dwarf. We obser…
View article: HCN and C<sub>2</sub>H<sub>2</sub> in the Atmosphere of a T8.5+T9 Brown Dwarf Binary
HCN and C<sub>2</sub>H<sub>2</sub> in the Atmosphere of a T8.5+T9 Brown Dwarf Binary Open
T-type brown dwarfs present an opportunity to explore atmospheres teeming with molecules such as H 2 O, CH 4 , and NH 3 , which exhibit a wealth of absorption features in the mid-infrared. With JWST, we can finally explore this chemistry i…
View article: MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field
MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field Open
Context. The recently launched James Webb Space Telescope (JWST) is opening new observing windows on the distant Universe. Among JWST’s instruments, the Mid Infrared Instrument (MIRI) offers the unique capability of imaging observations at…
View article: Water depletion and <sup>15</sup>NH<sub>3</sub> in the atmosphere of the coldest brown dwarf observed with JWST/MIRI
Water depletion and <sup>15</sup>NH<sub>3</sub> in the atmosphere of the coldest brown dwarf observed with JWST/MIRI Open
Context. With a temperature of ∼285 K, WISEJ0855–0714 (hereafter, WISE 0855) is the coldest brown dwarf observed thus far. Studying such cold gas giants allows us to probe the atmospheric physics and chemistry of evolved objects that resem…
View article: HCN and C2H2 in the atmosphere of a T8.5+T9 brown dwarf binary
HCN and C2H2 in the atmosphere of a T8.5+T9 brown dwarf binary Open
T-type brown dwarfs present an opportunity to explore atmospheres teeming with molecules such as H2O, CH4 and NH3, which exhibit a wealth of absorption features in the mid-infrared. With JWST, we can finally explore this chemistry in detai…
View article: MIDIS: Quantifying the AGN component of X-ray-detected galaxies
MIDIS: Quantifying the AGN component of X-ray-detected galaxies Open
We combine the deepest X-ray survey from the Chandra Deep Field-South (CDF-S) `7-Ms' survey with the deepest mid-infrared (5.6$ μm$) image from the JWST/MIRI Deep Imaging Survey (MIDIS) in the Hubble Ultra-Deep Field (HUDF) to study the in…
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: Combined analysis of the 12.8 and 15 µm JWST/MIRI eclipse observations of TRAPPIST-1 b
Combined analysis of the 12.8 and 15 µm JWST/MIRI eclipse observations of TRAPPIST-1 b Open
International audience
View article: MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field
MIRI Deep Imaging Survey (MIDIS) of the Hubble Ultra Deep Field Open
The recently launched James Webb Space Telescope (JWST) is opening new observing windows on the distant universe. Among JWST's instruments, the Mid Infrared Instrument (MIRI) offers the unique capability of imaging observations at waveleng…
View article: JWST/MIRI unveils the stellar component of the GN20 dusty galaxy overdensity at <i>z</i> = 4.05
JWST/MIRI unveils the stellar component of the GN20 dusty galaxy overdensity at <i>z</i> = 4.05 Open
Dusty star-forming galaxies (DSFGs) at z > 2 have been commonly observed in overdense regions, where the merging processes and large halo masses induce rapid gas accretion, triggering star formation rates (SFRs) up to ∼1000 M ⊙ yr −1 . Des…
View article: Water depletion and 15NH3 in the atmosphere of the coldest brown dwarf observed with JWST/MIRI
Water depletion and 15NH3 in the atmosphere of the coldest brown dwarf observed with JWST/MIRI Open
With a temperature of $\sim 285$ K WISE0855 is the coldest brown dwarf observed so far. Using the James Webb Space Telescope (JWST) we obtained observations that allow us to characterize WISE0855s atmosphere focusing on vertical variation …
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: 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: MIDIS: JWST/MIRI Reveals the Stellar Structure of ALMA-selected Galaxies in the Hubble Ultra Deep Field at Cosmic Noon
MIDIS: JWST/MIRI Reveals the Stellar Structure of ALMA-selected Galaxies in the Hubble Ultra Deep Field at Cosmic Noon Open
We present deep James Webb Space Telescope (JWST)/Mid-Infrared Instrument (MIRI) F560W observations of a flux-limited, Atacama Large Millimeter/submillimeter Array (ALMA)-selected sample of 28 galaxies at z = 0.5–3.7 in the Hubble Ultra De…
View article: MIDIS: MIRI uncovers Virgil, the first Little Red Dot with clear detection of its host galaxy at z ~ 6.6
MIDIS: MIRI uncovers Virgil, the first Little Red Dot with clear detection of its host galaxy at z ~ 6.6 Open
We present Virgil, a MIRI extremely red object (MERO) detected with the F1000W filter as part of the MIRI Deep Imaging Survey (MIDIS) observations of the Hubble Ultra Deep Field (HUDF). Virgil is a Lyman-$α$ emitter (LAE) at $z_{spec} = 6.…
View article: A NIRCam-dark Galaxy Detected with the MIRI/F1000W Filter in the MIDIS/JADES Hubble Ultra Deep Field
A NIRCam-dark Galaxy Detected with the MIRI/F1000W Filter in the MIDIS/JADES Hubble Ultra Deep Field Open
We report the discovery of Cerberus, an extremely red object detected with the MIRI Deep Imaging Survey (MIDIS) observations in the F1000W filter of the Hubble Ultra Deep Field. The object is detected at signal-to-noise ratio (S/N) ∼ 6, wi…
View article: MIDIS: Unveiling the Role of Strong Hα Emitters During the Epoch of Reionization with JWST
MIDIS: Unveiling the Role of Strong Hα Emitters During the Epoch of Reionization with JWST Open
By using an ultradeep JWST/MIRI image at 5.6 μ m in the Hubble eXtreme Deep Field, we constrain the role of strong H α emitters (HAEs) during “cosmic reionization” at z ≃ 7–8. Our sample of HAEs is comprised of young ( …