Search Publications
MINDS: JWST/NIRCam imaging of the protoplanetary disk PDS 70. A spiral accretion stream and a potential third protoplanet
Waters, L. B. F. M.; Olofsson, G.; Kamp, I. +28 more
Context. Two protoplanets have recently been discovered within the PDS 70 protoplanetary disk. JWST/NIRCam offers a unique opportunity to characterize them and their birth environment at wavelengths that are difficult to access from the ground.
Aims: We image the circumstellar environment of PDS 70 at 1.87 µm and 4.83 µm, assess t…
Constraining stellar and orbital co-evolution through ensemble seismology of solar-like oscillators in binary systems. A census of oscillating red giants and dwarf stars in Gaia DR3 binaries
Allende Prieto, C.; Merc, J.; Holl, B. +23 more
Context. Binary systems constitute a valuable astrophysics tool for testing our understanding of stellar structure and evolution. Systems containing at least one oscillating component are interesting in this regard because asteroseismology offers independent parameters for the oscillating component that aid in the analysis. Systems of particular i…
GA-NIFS: Early-stage feedback in a heavily obscured active galactic nucleus at z = 4.76
Charlot, Stéphane; Chevallard, Jacopo; Parlanti, Eleonora +19 more
Dust-obscured galaxies are thought to represent an early evolutionary phase of massive galaxies in which the active galactic nucleus (AGN) is still deeply buried in significant amounts of dusty material and its emission is strongly suppressed. The unprecedented sensitivity of the James Webb Space Telescope (JWST) enabled us for the first time to d…
Tracing Population III supernovae with extreme energies through the Sculptor dwarf spheroidal galaxy
Salvadori, S.; Skúladóttir, Á.; Vanni, I. +1 more
The Sculptor dwarf spheroidal galaxy is old and metal-poor, making it ideal to study the earliest chemical enrichment in the Local Group. We followed up on the most metal-poor star known in this (or any external) galaxy, AS0039, with high-resolution ESO VLT/UVES spectra. Our new analysis confirmed its low metallicity, [Fe/H]LTE = −3.90 …
A3COSMOS: The infrared luminosity function and dust-obscured star formation rate density at 0.5 < z < 6
Magnelli, B.; Pozzi, F.; Feltre, A. +16 more
Aims: We leverage the largest available Atacama Large Millimeter/submillimeter Array (ALMA) survey from the archive (A3COSMOS) to study infrared luminosity function and dust-obscured star formation rate density of (sub)millimeter galaxies from z = 0.5 − 6.
Methods: The A3COSMOS survey utilizes all publicly available…
GA-NIFS: JWST/NIRSpec integral field unit observations of HFLS3 reveal a dense galaxy group at z ∼ 6.3
Chevallard, Jacopo; Carniani, Stefano; Übler, Hannah +19 more
Massive, starbursting galaxies in the early Universe represent some of the most extreme objects in the study of galaxy evolution. One such source is HFLS3 (z ∼ 6.34), which was originally identified as an extreme starburst galaxy with mild gravitational magnification (µ ∼ 2.2). Here, we present new observations of HFLS3 with the JWST/NIRSpec…
Spatially resolved Hα and ionizing photon production efficiency in the lensed galaxy MACS1149-JD1 at a redshift of 9.11
Ilbert, O.; Östlin, G.; Colina, L. +32 more
We present MIRI/JWST medium-resolution spectroscopy (MRS) and imaging (MIRIM) of the lensed galaxy MACS1149-JD1 at a redshift of z = 9.1092 ± 0.0002, when the Universe was about 530 Myr old. We detect, for the first time, spatially resolved Hα emission in a galaxy at a redshift above nine. The structure of the Hα emitting gas consists of two clump…
A quasar-galaxy merger at z ∼ 6.2: Black hole mass and quasar properties from the NIRSpec spectrum
Strauss, Michael A.; Fan, Xiaohui; Trebitsch, Maxime +31 more
We present JWST/NIRSpec integral field data of the quasar PJ308-21 at z = 6.2342. As shown by previous ALMA and HST imaging, the quasar has two companion sources, interacting with the quasar host galaxy. The high-resolution G395H/290LP NIRSpec spectrum covers the 2.87 − 5.27 µm wavelength range and shows the rest-frame optical emission of th…
Gaia DR3 detectability of unresolved binary systems
Casey, Andrew R.; Rix, Hans-Walter; Brown, Anthony G. A. +10 more
Context.Gaia cannot individually resolve very close binary systems; however, the collected data can still be used to identify them. A powerful indicator of stellar multiplicity is the sources' reported re-normalised unit weight error (RUWE), which effectively captures the astrometric deviations from single-source solutions.
Aims: We aim to ch…
A new census of dust and polycyclic aromatic hydrocarbons at z = 0.7–2 with JWST MIRI
Pérez-González, Pablo G.; D'Eugenio, Francesco; Bunker, Andrew J. +26 more
Aims. This paper utilises the James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI) to extend the observational studies of dust and polycyclic aromatic hydrocarbon (PAH) emission to a new mass and star formation rate (SFR) parameter space beyond our local Universe. The combination of fully sampled spectral energy distributions (SEDs) wi…