Search Publications
The fifth data release of the Kilo Degree Survey: Multi-epoch optical/NIR imaging covering wide and legacy-calibration fields
Hoekstra, Henk; Sifón, Cristóbal; Heymans, Catherine +51 more
We present the final data release of the Kilo-Degree Survey (KiDS-DR5), a public European Southern Observatory (ESO) wide-field imaging survey optimised for weak gravitational lensing studies. We combined matched-depth multi-wavelength observations from the VLT Survey Telescope and the VISTA Kilo-degree INfrared Galaxy (VIKING) survey to create a …
Cosmic hide and seek: The volumetric rate of X-ray quasi-periodic eruptions
Salvato, M.; Liu, Z.; Buchner, J. +6 more
Multiwavelength extragalactic nuclear transients, particularly those detectable as multi-messengers, are among the primary drivers for the next-generation observatories. X-ray quasi-periodic eruptions (QPEs) are the most recent and perhaps most peculiar addition to this group. Here, we report a first estimate of the volumetric rate of QPEs based o…
Hydrogen sulfide and metal-enriched atmosphere for a Jupiter-mass exoplanet
Deming, Drake; Sing, David K.; Fu, Guangwei +15 more
As the closest transiting hot Jupiter to Earth, HD 189733b has been the benchmark planet for atmospheric characterization1–3. It has also been the anchor point for much of our theoretical understanding of exoplanet atmospheres from composition4, chemistry5,6, aerosols7 to atmospheric dynamics8…
JWST Directly Images Giant Planet Candidates Around Two Metal-polluted White Dwarf Stars
Barclay, Thomas; Hermes, J. J.; Reach, William T. +9 more
We report the discovery of two directly imaged, giant planet candidates orbiting the metal-rich, hydrogen atmosphere white dwarfs WD 1202‑232 and WD 2105‑82. JWST's Mid-Infrared Instrument (MIRI) data on these two stars show a nearby resolved source at a projected separation of 11.47 and 34.62 au, respectively. Assuming the planets formed at the s…
The ALMA Reionization Era Bright Emission Line Survey: The molecular gas content of galaxies at z 7
Inami, H.; De Looze, I.; Schneider, R. +19 more
A key to understanding the formation of the first galaxies is to quantify the content of the molecular gas as the fuel for star formation activity through the epoch of reionization. In this paper, we use the 158µm [C II] fine-structure emission line as a tracer of the molecular gas in the interstellar medium (ISM) in a sample of 𝓏 = 6.5-7.5 galaxi…
JWST Imaging of Edge-on Protoplanetary Disks. I. Fully Vertically Mixed 10 µm Grains in the Outer Regions of a 1000 au Disk
Duchêne, Gaspard; Wolff, Schuyler G.; Perrin, Marshall D. +6 more
Scattered light imaging of protoplanetary disks provides key insights on the geometry and dust properties in the disk surface. Here, we present James Webb Space Telescope (JWST) 2–21 µm images of a 1000 au radius edge-on protoplanetary disk surrounding an 0.4 M ⊙ young star in Taurus, Two Micron All Sky Survey (2MASS) J04202144 + …
JWST detection of extremely excited outflowing CO and H2O in VV 114 E SW: A possible rapidly accreting IMBH
González-Alfonso, Eduardo; Pereira-Santaella, Miguel; Neufeld, David A. +3 more
Mid-infrared (mid-IR) gas-phase molecular bands are powerful diagnostics of the warm interstellar medium. We report the James Webb Space Telescope detection of the CO v = 1 − 0 (4.4 − 5.0 µm) and H2O ν2 = 1 − 0 (5.0 − 7.8 µm) ro-vibrational bands, both in absorption, toward the "s2" core in the southwest nucleus o…
Peeling back the layers of extinction of dusty galaxies in the era of JWST: modelling joint NIRSpec + MIRI spectra at rest-frame 1.5-28 µm
Rigopoulou, D.; Pereira-Santaella, M.; Alonso-Herrero, A. +3 more
We present an analysis of the combined NIRSpec and MIRI spectra of dusty galaxies between 1.5 and 28 $\mu$m rest-frame by implementing a differential extinction model, where the strength of extinction varies across the spectrum as different layers of the obscuring dust are probed. Our model is able to recover a 2D distribution of dust temperature …
JWST-TST High Contrast: Asymmetries, Dust Populations, and Hints of a Collision in the β Pictoris Disk with NIRCam and MIRI
Stark, Christopher C.; Valenti, Jeff A.; van der Marel, Roeland P. +21 more
We present the first JWST Mid-Infrared Instrument (MIRI) and Near Infrared Camera (NIRCam) observations of the prominent debris disk around β Pictoris. Coronagraphic observations in eight filters spanning from 1.8 to 23 µm provide an unprecedentedly clear view of the disk at these wavelengths. The objectives of the observing program were to …
Unveiling lens light complexity with a novel multi-Gaussian expansion approach for strong gravitational lensing
Massey, Richard; Robertson, Andrew; Cole, Shaun +8 more
In a strong gravitational lensing system, the distorted light from a source is analysed to infer the properties of the lens. However, light emitted by the lens itself can contaminate the image of the source, introducing systematic errors in the analysis. We present a simple and efficient lens light model based on the well-tested multi-Gaussian exp…