T. P. Ray
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View article: JWST/MIRI observations of the young TWA 27 system: Hydrocarbon disk chemistry, silicate clouds, and evidence of a circumplanetary disk
JWST/MIRI observations of the young TWA 27 system: Hydrocarbon disk chemistry, silicate clouds, and evidence of a circumplanetary disk Open
Context . The Mid-Infrared Instrument (MIRI) on board the James Webb Space Telescope (JWST) enables the characterisation of young self-luminous gas giants in a previously inaccessible wavelength range, revealing insights into physical proc…
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: Erratum: “MINDS. JWST-MIRI Observations of a Spatially Resolved Atomic Jet and Polychromatic Molecular Wind toward SY Cha” (2025, ApJ, 980, 148)
Erratum: “MINDS. JWST-MIRI Observations of a Spatially Resolved Atomic Jet and Polychromatic Molecular Wind toward SY Cha” (2025, ApJ, 980, 148) Open
The published article contained several errors in the calculation of the annular flux and the total H2 mass. Table 2 gives the updated annular flux values. Additionally, the rotation diagram analysis does not account for the normalization …
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: Engagement of People With Lived Experience in Spinal Cord Injury to Address Innovation Priorities
Engagement of People With Lived Experience in Spinal Cord Injury to Address Innovation Priorities Open
Introduction The involvement of people with lived experience (PLEX) of spinal cord injury (SCI) is not common during medical innovation design, research and commercialization processes. To address the SCI community's needs and priorities, …
View article: Six-year SPIRou monitoring of the young planet-host AU Mic
Six-year SPIRou monitoring of the young planet-host AU Mic Open
In this paper we revisit our spectropolarimetric and velocimetric analysis of the young M dwarf AU Mic based on data collected with SPIRou at the Canada-France-Hawaii telescope, over a monitoring period of 2041 days from 2019 to 2024. The …
View article: Six-yr SPIRou monitoring of the young planet-host dwarf AU Mic
Six-yr SPIRou monitoring of the young planet-host dwarf AU Mic Open
In this paper we revisit our spectropolarimetric and velocimetric analysis of the young M dwarf AU Mic based on data collected with SPIRou at the Canada-France-Hawaii telescope, over a monitoring period of 2041 d from 2019 to 2024. The lon…
View article: JWST Observations of Young protoStars (JOYS)
JWST Observations of Young protoStars (JOYS) Open
Context. The embedded phase of star formation is a crucial period in the development of a young star when the system still accretes matter, emerges from its natal cloud with assistance from powerful jets and outflows, and forms a disk, thu…
View article: The rich JWST spectrum of the western nucleus of Arp 220: Shocked hot core chemistry dominates the inner disc
The rich JWST spectrum of the western nucleus of Arp 220: Shocked hot core chemistry dominates the inner disc Open
We present full 3–28 μm JWST MIRI/MRS and NIRSpec/IFU spectra of the western nucleus of Arp 220, the nearest ultraluminous infrared galaxy. This nucleus has long been suggested to possibly host an embedded Compton-thick AGN. Millimetre obs…
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: The Rich JWST Spectrum of the Western Nucleus of Arp 220: Shocked Hot Core Chemistry Dominates the Inner Disk
The Rich JWST Spectrum of the Western Nucleus of Arp 220: Shocked Hot Core Chemistry Dominates the Inner Disk Open
We present full 3-28 $\mathrm{μm}$ JWST MIRI/MRS and NIRSpec/IFU spectra of the western nucleus of Arp 220, the nearest ultraluminous infrared galaxy. This nucleus has long been suggested to possibly host an embedded Compton-thick AGN. Mil…
View article: MINDS. JWST-MIRI Observations of a Spatially Resolved Atomic Jet and Polychromatic Molecular Wind toward SY Cha
MINDS. JWST-MIRI Observations of a Spatially Resolved Atomic Jet and Polychromatic Molecular Wind toward SY Cha Open
The removal of angular momentum from protostellar systems drives accretion onto the central star and may drive the dispersal of the protoplanetary disk. Winds and jets can contribute to removing angular momentum from the disk, though the d…
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: JOYS: The [D/H] abundance derived from protostellar outflows across the Galactic disk measured with JWST
JOYS: The [D/H] abundance derived from protostellar outflows across the Galactic disk measured with JWST Open
Context . The total deuterium abundance [D/H] in the universe is set by just two processes: the creation of deuterium in Big Bang nucleosynthesis at an abundance of [D/H] = 2.58 ± 0.13 × 10 −5 , and its destruction within stellar interiors…
View article: MINDS: JWST/NIRCam imaging of the protoplanetary disk PDS 70
MINDS: JWST/NIRCam imaging of the protoplanetary disk PDS 70 Open
Contains fulltext : 316490.pdf (Publisher’s version ) (Open Access)
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: MICONIC: Dual active galactic nuclei, star formation, and ionised gas outflows in NGC 6240 seen with MIRI/JWST
MICONIC: Dual active galactic nuclei, star formation, and ionised gas outflows in NGC 6240 seen with MIRI/JWST Open
Context. Galaxy mergers are an important and complex phase during the evolution of galaxies. They may trigger nuclear activity and/or strong star forming episodes in galaxy centres that potentially alter the evolution of the system. Aims. …
View article: JWST Observations of Young protoStars (JOYS)
JWST Observations of Young protoStars (JOYS) Open
Context . The Mid-InfraRed Instrument (MIRI) on board the James Webb Space Telescope (JWST) allows one to probe the molecular gas composition at mid-infrared (mid-IR) wavelengths with unprecedented resolution and sensitivity. It is importa…
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: JWST Observations of Young protoStars (JOYS). Overview of gaseous molecular emission and absorption in low-mass protostars
JWST Observations of Young protoStars (JOYS). Overview of gaseous molecular emission and absorption in low-mass protostars Open
The MIRI-MRS instrument onboard JWST allows for probing the molecular gas composition at mid-IR wavelengths at unprecedented resolution and sensitivity. It is important to study these features in low-mass embedded protostellar systems sinc…
View article: JWST Observations of Young protoStars (JOYS)
JWST Observations of Young protoStars (JOYS) Open
Context . Due to the high visual extinction and lack of sensitive mid-infrared (MIR) telescopes, the origin and properties of outflows and jets from embedded Class 0 protostars are still poorly constrained. Aims . We aim to characterise th…
View article: MINDS. JWST-MIRI Observations of a Spatially Resolved Atomic Jet and Polychromatic Molecular Wind Toward SY Cha
MINDS. JWST-MIRI Observations of a Spatially Resolved Atomic Jet and Polychromatic Molecular Wind Toward SY Cha Open
The removal of angular momentum from protostellar systems drives accretion onto the central star and may drive the dispersal of the protoplanetary disk. Winds and jets can contribute to removing angular momentum from the disk, though the d…
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: JWST Observations of Young protoStars (JOYS) Linked accretion and ejection in a Class I protobinary system
JWST Observations of Young protoStars (JOYS) Linked accretion and ejection in a Class I protobinary system Open
Context. Accretion and ejection dictate the outcomes of star and planet formation processes. The mid-infrared (MIR) wavelength range offers key tracers of processes that have been difficult to detect and spatially resolve in protostars unt…