Search Publications
Gaia Data Release 2. Catalogue validation
Jordi, C.; Luri, X.; Cantat-Gaudin, T. +35 more
Context. The second Gaia data release (DR2) contains very precise astrometric and photometric properties for more than one billion sources, astrophysical parameters for dozens of millions, radial velocities for millions, variability information for half a million stars from selected variability classes, and orbits for thousands of solar system obj…
From thermal dissociation to condensation in the atmospheres of ultra hot Jupiters: WASP-121b in context
Fortney, Jonathan J.; Désert, Jean-Michel; Showman, Adam P. +10 more
Context. A new class of exoplanets has emerged: the ultra hot Jupiters, the hottest close-in gas giants. The majority of them have weaker-than-expected spectral features in the 1.1-1.7 µm bandpass probed by HST/WFC3 but stronger spectral features at longer wavelengths probed by Spitzer. This led previous authors to puzzling conclusions about…
The nature of the TRAPPIST-1 exoplanets
Triaud, Amaury H. M. J.; Burgasser, Adam J.; Gillon, Michaël +23 more
Context. The TRAPPIST-1 system hosts seven Earth-sized, temperate exoplanets orbiting an ultra-cool dwarf star. As such, it represents a remarkable setting to study the formation and evolution of terrestrial planets that formed in the same protoplanetary disk. While the sizes of the TRAPPIST-1 planets are all known to better than 5% precision, the…
Near infrared spectroscopy and star-formation histories of 3 ≤ z ≤ 4 quiescent galaxies
Papovich, C.; Glazebrook, K.; Kacprzak, G. G. +8 more
We present Keck-MOSFIRE H and K spectra for a sample of 24 candidate quiescent galaxies at 3 < z < 4, identified from their rest-frame UVJ colors and photometric redshifts in the ZFOURGE and 3DHST surveys. With median integration times of one hour in H and five in K, we obtain spectroscopic redshifts for half of the sample, using either Balm…
GOODS-ALMA: 1.1 mm galaxy survey. I. Source catalog and optically dark galaxies
Magnelli, B.; Daddi, E.; Elbaz, D. +36 more
Aims: We present a 69 arcmin2 ALMA survey at 1.1 mm, GOODS-ALMA, matching the deepest HST-WFC3 H-band part of the GOODS-South field.
Methods: We tapered the 0″24 original image with a homogeneous and circular synthesized beam of 0″60 to reduce the number of independent beams - thus reducing the number of purely statistical spu…
Dust temperature and mid-to-total infrared color distributions for star-forming galaxies at 0 < z < 4
Elbaz, D.; Franco, M.; Ciesla, L. +3 more
We present a new, publicly available library of dust spectral energy distributions (SEDs). These SEDs are characterized by only three parameters: the dust mass (Mdust), the dust temperature (Tdust), and the mid-to-total infrared color (IR8 ≡ LIR/L8). The latter measures the relative contribution of polyc…
The evolution of the X-ray afterglow emission of GW 170817/ GRB 170817A in XMM-Newton observations
Covino, S.; D'Avanzo, P.; Campana, S. +12 more
We report our observation of the short gamma-ray burst (GRB) GRB 170817A, associated to the binary neutron star merger gravitational wave (GW) event GW 170817, performed in the X-ray band with XMM-Newton 135 d after the event (on 29 December, 2017). We find evidence for a flattening of the X-ray light curve with respect to the previously observed …
Starbursts in and out of the star-formation main sequence
Daddi, E.; Elbaz, D.; Franco, M. +13 more
Aims: We use high-resolution continuum images obtained with the Atacama Large Millimeter Array (ALMA) to probe the surface density of star formation in z ~ 2 galaxies and study the different physical properties between galaxies within and above the star-formation main sequence of galaxies.
Methods: We use ALMA images at 870 µm with…
Hubble PanCET: an extended upper atmosphere of neutral hydrogen around the warm Neptune GJ 3470b
Sanz-Forcada, J.; Ehrenreich, D.; Lecavelier des Etangs, A. +16 more
GJ 3470b is a warm Neptune transiting an M-dwarf star at the edge of the evaporation desert. It offers the possibility of investigating how low-mass, close-in exoplanets evolve under the irradiation from their host stars. We observed three transits of GJ 3470b in the Lyman-α line with the Hubble Space Telescope (HST) as part of the Panchromatic Co…
Reanalysis of the Gaia Data Release 2 photometric sensitivity curves using HST/STIS spectrophotometry
Weiler, M.; Maíz Apellániz, J.
Context. The second data release (DR2) from the European Space Agency mission Gaia took place on April 2018. DR2 included photometry for more than 1.3 × 109 sources in the three bands G, GBP, and GRP. Even though the Gaia DR2 photometry is very precise, there are currently three alternative definitions of the sensi…