Search Publications
Constraints on the star-formation rate of z ~ 3 LBGs with measured metallicity in the CANDELS GOODS-South field
Maiolino, R.; Schaerer, D.; Ferguson, H. C. +19 more
Aims: We aim to constrain the assembly history of high-redshift galaxies and the reliability of UV-based estimates of their physical parameters from an accurate analysis of a unique sample of z ~ 3 Lyman-break galaxies (LBGs).
Methods: We analyse 14 LBGs at z ~ 2.8-3.8 constituting the only sample where both a spectroscopic measurement o…
The formation heights of coronal shocks from 2D density and Alfvén speed maps
Gallagher, Peter T.; Zucca, Pietro; Carley, Eoin P. +1 more
Context. Super-Alfvénic shocks associated with coronal mass ejections (CMEs) can produce radio emission known as Type II bursts. In the absence of direct imaging, accurate estimates of coronal electron densities, magnetic field strengths, and Alfvén speeds are required to calculate the kinematics of shocks. To date, 1D radial models have been used…
The rotation state of 67P/Churyumov-Gerasimenko from approach observations with the OSIRIS cameras on Rosetta
Jorda, L.; Lamy, P. L.; Bertaux, J. -L. +46 more
Aims: Approach observations with the Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) experiment onboard Rosetta are used to determine the rotation period, the direction of the spin axis, and the state of rotation of comet 67P's nucleus.
Methods: Photometric time series of 67P have been acquired by OSIRIS since the pos…
Chemical composition and constraints on mass loss for globular clusters in dwarf galaxies: WLM and IKN
Forbes, Duncan A.; Brodie, Jean P.; Strader, Jay +1 more
Aims: We determine the metallicities of globular clusters (GCs) in the
Molecular ions in the protostellar shock L1157-B1
Podio, L.; Codella, C.; Ceccarelli, C. +2 more
Aims: We perform a complete census of molecular ions with an abundance greater than ~10-10 in the protostellar shock L1157-B1. This allows us to study the ionisation structure and chemistry of the shock.
Methods: An unbiased high-sensitivity survey of L1157-B1 performed with the IRAM-30 m and Herschel/HIFI as part of the CHESS…
Dust and gas in luminous proto-cluster galaxies at z = 4.05: the case for different cosmic dust evolution in normal and starburst galaxies
Daddi, E.; Elbaz, D.; Béthermin, M. +14 more
We measure the dust and gas content of the three submillimeter galaxies (SMGs) in the GN20 proto-cluster at z = 4.05 using new IRAM Plateau de Bure interferometer (PdBI) CO(4-3) and 1.2-3.3 mm continuum observations. All these three SMGs are heavily dust obscured, with UV-based star formation rate (SFR) estimates significantly smaller than the one…
A hidden reservoir of Fe/FeS in interstellar silicates?
Ysard, N.; Jones, A.; Köhler, M.
Context. The depletion of iron and sulphur into dust in the interstellar medium and the exact nature of interstellar amorphous silicate grains is still an open question.
Aims: We study the incorporation of iron and sulphur into amorphous silicates of olivine- and pyroxene-types and their effects on the dust spectroscopy and thermal emission. …
Near-infrared transmission spectrum of the warm-Uranus GJ 3470b with the Wide Field Camera-3 on the Hubble Space Telescope
Ségransan, D.; Bonfils, X.; Ehrenreich, D. +7 more
The atmospheric composition of super-Earths and Neptunes is the object of intense observational and theoretical investigations. Transmission spectra recently obtained for such exoplanets are featureless in the near infrared. This flat signature is attributed to the presence of optically-thick clouds or translucent hazes. The planet
The W43-MM1 mini-starburst ridge, a test for star formation efficiency models
Hill, T.; Csengeri, T.; Bontemps, S. +13 more
Context. Star formation efficiency (SFE) theories are currently based on statistical distributions of turbulent cloud structures and a simple model of star formation from cores. They remain poorly tested, especially at the highest densities.
Aims: We investigate the effects of gas density on the SFE through measurements of the core formation …
Planck 2013 results. II. Low Frequency Instrument data processing
Bernard, J. -P.; Planck Collaboration; Aghanim, N. +229 more
We describe the data processing pipeline of the Planck Low Frequency Instrument (LFI) data processing centre (DPC) to create and characterize full-sky maps based on the first 15.5 months of operations at 30, 44, and 70 GHz. In particular, we discuss the various steps involved in reducing the data, from telemetry packets through to the production o…