Search Publications
The VANDELS survey: The relation between the UV continuum slope and stellar metallicity in star-forming galaxies at z ∼ 3
Cimatti, A.; Schaerer, D.; Franco, M. +23 more
The estimate of stellar metallicities (Z*) of high-z galaxies are of paramount importance in order to understand the complexity of dust effects and the reciprocal interrelations among stellar mass, dust attenuation, stellar age, and metallicity. Benefiting from uniquely deep far-UV spectra of > 500 star-forming galaxies at redshifts …
The ALPINE-ALMA [CII] survey. The contribution of major mergers to the galaxy mass assembly at z ∼ 5
Cimatti, A.; Rodighiero, G.; Schaerer, D. +25 more
Context. Galaxy mergers are thought to be one of the main mechanisms of the mass assembly of galaxies in the Universe, but there is still little direct observational evidence of how frequent they are at z ≳ 4. Recently, many works have suggested a possible increase in the fraction of major mergers in the early Universe, reviving the debate on whic…
Gaia Early Data Release 3. Modelling and calibration of Gaia's point and line spread functions
Mora, A.; Evans, D. W.; Brown, A. G. A. +18 more
Context. The unprecedented astrometric precision of the Gaia mission relies on accurate estimates of the locations of sources in the Gaia data stream. This is ultimately performed by point spread function (PSF) fitting, which in turn requires an accurate reconstruction of the PSF, including calibrations of all the major dependences. These include …
Bright galaxy sample in the Kilo-Degree Survey Data Release 4. Selection, photometric redshifts, and physical properties
Heymans, C.; Hoekstra, H.; Hildebrandt, H. +16 more
We present a bright galaxy sample with accurate and precise photometric redshifts (photo-zs), selected using ugriZYJHKs photometry from the Kilo-Degree Survey (KiDS) Data Release 4. The highly pure and complete dataset is flux-limited at r < 20 mag, covers ∼1000 deg2, and contains about 1 million galaxies after artifact ma…
The Galaxy Activity, Torus, and Outflow Survey (GATOS). II. Torus and polar dust emission in nearby Seyfert galaxies
Rouan, D.; Rigopoulou, D.; Hunt, L. K. +30 more
We compare high angular resolution mid-infrared (mid-IR) and Atacama Large Millimeter/submillimeter Array (ALMA) far-infrared (far-IR) images of twelve nearby (median 21 Mpc) Seyfert galaxies selected from the Galaxy Activity, Torus, and Outflow Survey (GATOS). The mid-IR unresolved emission contributes more than 60% of the nuclear (diameters of 1…
Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program. IV. Carbon and C/O ratios for Galactic stellar populations and planet hosts
Adibekyan, V.; Sousa, S. G.; Santos, N. C. +4 more
Context. To understand the formation and composition of planetary systems, it is essential to have insights into the chemical composition of their host stars. In particular, C/O elemental ratios are useful for constraining the density and bulk composition of terrestrial planets.
Aims: We study the carbon abundances with a twofold objective. O…
A new high-precision strong lensing model of the galaxy cluster MACS J0416.1-2403. Robust characterization of the cluster mass distribution from VLT/MUSE deep observations
Grillo, C.; Tozzi, P.; Rosati, P. +8 more
We present a new high-precision parametric strong lensing model of the galaxy cluster MACS J0416.1-2403, at z = 0.396, which takes advantage of the MUSE Deep Lensed Field (MDLF), with 17.1 h integration in the northeast region of the cluster, and Hubble Frontier Fields data. We spectroscopically identify 182 multiple images from 48 background sour…
First year of energetic particle measurements in the inner heliosphere with Solar Orbiter's Energetic Particle Detector
Kulkarni, S. R.; Lario, D.; Vainio, R. +45 more
Context. Solar Orbiter strives to unveil how the Sun controls and shapes the heliosphere and fills it with energetic particle radiation. To this end, its Energetic Particle Detector (EPD) has now been in operation, providing excellent data, for just over a year.
Aims: EPD measures suprathermal and energetic particles in the energy range from …
CHEOPS precision phase curve of the Super-Earth 55 Cancri e
Guterman, P.; Alonso, R.; Deleuil, M. +79 more
Context. 55 Cnc e is a transiting super-Earth (radius 1.88 R⊕ and mass 8 M⊕) orbiting a G8V host star on a 17-h orbit. Spitzer observations of the planet's phase curve at 4.5 µm revealed a time-varying occultation depth, and MOST optical observations are consistent with a time-varying phase curve amplitude and phase off…
Formation and dynamics of water clouds on temperate sub-Neptunes: the example of K2-18b
Bézard, B.; Charnay, B.; Leconte, J. +3 more
Context. Hubble Space Telescope (HST) spectroscopic transit observations of the temperate sub-Neptune K2-18b were interpreted as the presence of water vapour with potential water clouds. 1D modelling studies also predict the formation of water clouds in K2-18b's atmosphere in some conditions. However, such models cannot predict the cloud cover, wh…