Search Publications
Beyond Gaia DR3: Tracing the [α/M] - [M/H] bimodality from the inner to the outer Milky Way disc with Gaia-RVS and convolutional neural networks
Guiglion, G.; Fabbro, S.; Valentini, M. +17 more
Context. In June 2022, Gaia DR3 provided the astronomy community with about one million spectra from the Radial Velocity Spectrometer (RVS) covering the CaII triplet region. In the next Gaia data releases, we anticipate the number of RVS spectra to successively increase from several 10 million spectra to eventually more than 200 million spectra. T…
PDRs4All. II. JWST's NIR and MIR imaging view of the Orion Nebula
Hartigan, Patrick; Zhang, Yong; Gordon, Karl D. +139 more
Context. The James Webb Space Telescope (JWST) has captured the most detailed and sharpest infrared (IR) images ever taken of the inner region of the Orion Nebula, the nearest massive star formation region, and a prototypical highly irradiated dense photo-dissociation region (PDR).
Aims: We investigate the fundamental interaction of far-ultra…
The Mantis Network. IV. A titanium cold trap on the ultra-hot Jupiter WASP-121 b
Allart, R.; Morris, B. M.; Heng, Kevin +10 more
Context. Using emission lines from metals, we investigate the three-dimensional distribution of temperature and chemistry in ultra-hot Jupiters.
Aims: Existing observations of WASP-121 b have suggested an underabundance of titanium and titanium oxide in its terminator region. In this study, we aim to determine whether this depletion is global…
GA-NIFS: Co-evolution within a highly star-forming galaxy group at z ∼ 3.7 witnessed by JWST/NIRSpec IFS
Maiolino, R.; Perna, M.; Cresci, G. +17 more
We present NIRSpec IFS observations of a galaxy group around the massive GS_4891 galaxy at z ∼ 3.7 in GOODS-South that includes two other two systems, GS_4891n to the north and GS_28356 to the east. These observations, obtained as part of the GTO Galaxy Assembly - NIRSpec IFS (GA-NIFS) program, allow us to study for the first time the s…
The Galaxy Activity, Torus, and Outflow Survey (GATOS). III. Revealing the inner icy structure in local active galactic nuclei
Rouan, D.; Rigopoulou, D.; Stalevski, M. +24 more
We use JWST/MIRI MRS spectroscopy of a sample of six local obscured type 1.9/2 active galactic nuclei (AGN) to compare their nuclear mid-IR absorption bands with the level of nuclear obscuration traced by X-rays. This study is the first to use subarcsecond angular resolution data of local obscured AGN to investigate the nuclear mid-IR absorption b…
JWST/CEERS sheds light on dusty star-forming galaxies: Forming bulges, lopsidedness, and outside-in quenching at cosmic noon
Papovich, Casey; Finkelstein, Steven L.; Pérez-González, Pablo G. +26 more
Context. We investigate the morphology and resolved physical properties of a sample of 22 IR-selected dusty star-forming galaxies at cosmic noon using the James Webb Space Telescope NIRCam images obtained in the EGS field for the CEERS survey. The exceptional resolution of the NIRCam images allowed us to spatially resolve these galaxies up to 4.4 …
Magnetic field properties inside the jet of Mrk 421. Multiwavelength polarimetry, including the Imaging X-ray Polarimetry Explorer
Kaaret, Philip; Wu, Kinwah; Enoto, Teruaki +133 more
Aims: We aim to probe the magnetic field geometry and particle acceleration mechanism in the relativistic jets of supermassive black holes.
Methods: We conducted a polarimetry campaign from radio to X-ray wavelengths of the high-synchrotron-peak (HSP) blazar Mrk 421, including Imaging X-ray Polarimetry Explorer (IXPE) measurements from 2…
From super-Earths to sub-Neptunes: Observational constraints and connections to theoretical models
Bouchy, François; Helled, Ravit; Parc, Léna +2 more
The growing number of well-characterized exoplanets smaller than Neptune enables us to conduct more detailed population studies. We have updated the PlanetS catalog of transiting planets with precise and robust mass and radius measurements and use this comprehensive catalog to explore mass-radius (M-R) diagrams. On the one hand, we propose new M-R…
Sustained super-Eddington accretion in high-redshift quasars
Lupi, Alessandro; Volonteri, Marta; Colpi, Monica +2 more
Observations of z ≳ 6 quasars provide information on the early evolution of the most massive black holes (MBHs) and galaxies. Current observations, able to trace both gas and stellar properties, reveal a population of MBHs that is significantly more massive than expected from the local MBH-stellar mass relation. The population lies on, but mostly …
JADES: Balmer decrement measurements at redshifts 4 < z < 7
Chevallard, Jacopo; Carniani, Stefano; Übler, Hannah +33 more
We present Balmer decrement, Hα/Hβ, measurements for a sample of 51 galaxies at redshifts z = 4 ‑ 7 observed with the JWST/NIRSpec micro-shutter assembly (MSA), as part of the JWST Advanced Deep Extragalactic Survey (JADES). Leveraging 28-hour long exposures and the efficiency of the prism/clear configuration (but also using information from the m…