Search Publications
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…
The SPHERE view of the Taurus star-forming region. The full census of planet-forming disks with GTO and DESTINYS programs
Pinte, C.; Ménard, F.; Quanz, S. P. +31 more
The sample of planet-forming disks observed by high-contrast imaging campaigns over the last decade is mature enough to enable the demographical analysis of individual star-forming regions. We present the full census of Taurus sources with VLT/SPHERE polarimetric images available. The whole sample sums up to 43 targets (of which 31 have not been p…
Insights from super-metal-rich stars: Is the Milky Way bar young?
Guiglion, G.; Chiappini, C.; Queiroz, A. B. +6 more
Context. Bar formation and merger events can contribute to the rearrangement of stars within the Galaxy in addition to triggering star formation (SF) epochs. Super-metal-rich (SMR) stars found in the solar neighbourhood (SNd) can be used as tracers of such events as they are expected to originate only in the inner Galaxy and to have definitely mig…