Search Publications
Estimation of the XUV radiation onto close planets and their evaporation
Eiroa, C.; Ribas, I.; Solano, E. +5 more
Context. The current distribution of planet mass vs. incident stellar X-ray flux supports the idea that photoevaporation of the atmosphere may take place in close-in planets. Integrated effects have to be accounted for. A proper calculation of the mass loss rate through photoevaporation requires the estimation of the total irradiation from the who…
Planck early results. XIX. All-sky temperature and dust optical depth from Planck and IRAS. Constraints on the "dark gas" in our Galaxy
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +205 more
An all sky map of the apparent temperature and optical depth of thermal dust emission is constructed using the Planck-HFI (350µm to 2 mm) andIRAS(100µm) data. The optical depth maps are correlated with tracers of the atomic (Hi) and molecular gas traced by CO. The correlation with the column density of observed gas is linear in the low…
The global dust SED: tracing the nature and evolution of dust with DustEM
Boulanger, F.; Bernard, J. -P.; Le Bourlot, J. +6 more
The Planck and Herschel missions are currently measuring the far-infrared to millimeter emission of dust, which combined with existing IR data, will for the first time provide the full spectral energy distribution (SED) of the galactic interstellar medium dust emission, from the mid-IR to the mm range, with an unprecedented sensitivity and down to…
Evolution of the dusty infrared luminosity function from z = 0 to z = 2.3 using observations from Spitzer
Magnelli, B.; Elbaz, D.; Frayer, D. T. +4 more
Aims: We derive the evolution of the infrared luminosity function (LF) over the last 4/5ths of cosmic time using deep 24 and 70 µm imaging of the GOODS North and South fields.
Methods: We use an extraction technique based on prior source positions at shorter wavelengths to build the 24 and 70 µm source catalogs. The majority …
The VLT-FLAMES Tarantula Survey. I. Introduction and observational overview
van Loon, J. Th.; Costa, E.; Howarth, I. D. +39 more
The VLT-FLAMES Tarantula Survey (VFTS) is an ESO Large Programme that has obtained multi-epoch optical spectroscopy of over 800 massive stars in the 30 Doradus region of the Large Magellanic Cloud (LMC). Here we introduce our scientific motivations and give an overview of the survey targets, including optical and near-infrared photometry and compr…
Planck early results. VII. The Early Release Compact Source Catalogue
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +228 more
A brief description of the methodology of construction, contents and usage of the Planck Early Release Compact Source Catalogue (ERCSC), including the Early Cold Cores (ECC) and the Early Sunyaev-Zeldovich (ESZ) cluster catalogue is provided. The catalogue is based on data that consist of mapping the entire sky once and 60% of the sky a second tim…
Evolution of the solar irradiance during the Holocene
Solanki, S. K.; Usoskin, I.; Krivova, N. A. +1 more
Context. Long-term records of solar radiative output are vital for understanding solar variability and past climate change. Measurements of solar irradiance are available for only the last three decades, which calls for reconstructions of this quantity over longer time scales using suitable models.
Aims: We present a physically consistent rec…
The underlying physical meaning of the νmax - νc relation
Baudin, F.; Samadi, R.; Mosser, B. +4 more
Asteroseismology of stars that exhibit solar-like oscillations are enjoying a growing interest with the wealth of observational results obtained with the CoRoT and Kepler missions. In this framework, scaling laws between asteroseismic quantities and stellar parameters are becoming essential tools to study a rich variety of stars. However, the phys…
Filaments and ridges in Vela C revealed by Herschel: from low-mass to high-mass star-forming sites
Bernard, J. -P.; Martin, P. G.; Hill, T. +29 more
We present the first Herschel PACS and SPIRE results of the Vela C molecular complex in the far-infrared and submillimetre regimes at 70, 160, 250, 350, and 500 µm, spanning the peak of emission of cold prestellar or protostellar cores. Column density and multi-resolution analysis (MRA) differentiates the Vela C complex into five distinct su…
A new approach to the long-term reconstruction of the solar irradiance leads to large historical solar forcing
Schmutz, W.; Rozanov, E.; Shapiro, A. I. +4 more
Context. The variable Sun is the most likely candidate for the natural forcing of past climate changes on time scales of 50 to 1000 years. Evidence for this understanding is that the terrestrial climate correlates positively with the solar activity. During the past 10 000 years, the Sun has experienced the substantial variations in activity and th…