Search Publications
Planck intermediate results. XXXI. Microwave survey of Galactic supernova remnants
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +160 more
The all-sky Planck survey in 9 frequency bands was used to search for emission from all 274 known Galactic supernova remnants. Of these, 16 were detected in at least two Planck frequencies. The radio-through-microwave spectral energy distributions were compiled to determine the mechanism for microwave emission. In only one case, IC 443, is there h…
Planck 2015 results. V. LFI calibration
Bernard, J. -P.; Planck Collaboration; Ade, P. A. R. +206 more
We present a description of the pipeline used to calibrate the Planck Low Frequency Instrument (LFI) timelines into thermodynamic temperatures for the Planck 2015 data release, covering four years of uninterrupted operations. As in the 2013 data release, our calibrator is provided by the spin-synchronous modulation of the cosmic microwave backgrou…
Exploring the mass assembly of the early-type disc galaxy NGC 3115 with MUSE
Krajnović, D.; Guérou, A.; Emsellem, E. +3 more
We present MUSE integral field spectroscopic data of the S0 galaxy NGC 3115 obtained during the instrument commissioning at the ESO Very Large Telescope (VLT). We analyse the galaxy stellar kinematics and stellar populations and present two-dimensional maps of their associated quantities. We thus illustrate the capacity of MUSE to map extra-galact…
Characterization of foreground emission on degree angular scales for CMB B-mode observations . Thermal dust and synchrotron signal from Planck and WMAP data
Aumont, J.; Baccigalupi, C.; Bersanelli, M. +2 more
We quantify the contamination from polarized diffuse Galactic synchrotron and thermal dust emissions to the B modes of the cosmic microwave background (CMB) anisotropies on the degree angular scale, using data from the Planck and Wilkinson Microwave Anisotropy Probe (WMAP) satellites. We compute power spectra of foreground polarized emissions in 3…
Planck 2015 results. III. LFI systematic uncertainties
Bernard, J. -P.; Planck Collaboration; Ade, P. A. R. +168 more
We present the current accounting of systematic effect uncertainties for the Low Frequency Instrument (LFI) that are relevant to the 2015 release of the Planck cosmological results, showing the robustness and consistency of our data set, especially for polarization analysis. We use two complementary approaches: (I) simulations based on measured da…
The bolometric and UV attenuation in normal spiral galaxies of the Herschel Reference Survey
Ciesla, L.; Boquien, M.; Fritz, J. +11 more
The dust in nearby galaxies absorbs a fraction of the UV-optical-near-infrared radiation produced by stars. This energy is consequently re-emitted in the infrared. We investigate the portion of the stellar radiation absorbed by spiral galaxies from the Herschel Reference Survey (HRS) by modelling their UV-to-submillimetre spectral energy distribut…
Modelling observations of the inner gas and dust coma of comet 67P/Churyumov-Gerasimenko using ROSINA/COPS and OSIRIS data: First results
Jorda, L.; Altwegg, K.; Shi, X. +19 more
Context. This paper describes the initial modelling of gas and dust data acquired in August and September 2014 from the European Space Agency's Rosetta spacecraft when it was in close proximity to the nucleus of comet 67P/Churyumov-Gerasimenko.
Aims: This work is an attempt to provide a self-consistent model of the innermost gas and dust coma…
Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function
Paolillo, M.; Middei, R.; Vagnetti, F. +2 more
Context. Most investigations of the X-ray variability of active galactic nuclei (AGN) have been concentrated on the detailed analyses of individual, nearby sources. A relatively small number of studies have treated the ensemble behaviour of the more general AGN population in wider regions of the luminosity-redshift plane.
Aims: We want to det…
Dust particle flux and size distribution in the coma of 67P/Churyumov-Gerasimenko measured in situ by the COSIMA instrument on board Rosetta
Altobelli, Nicolas; Langevin, Yves; Fischer, Henning +14 more
Context. The COmetary Secondary Ion Mass Analyzer (COSIMA) on board Rosetta is dedicated to the collection and compositional analysis of the dust particles in the coma of 67P/Churyumov-Gerasimenko (67P).
Aims: Investigation of the physical properties of the dust particles collected along the comet trajectory around the Sun starting at a helio…
Tracing extended low-velocity shocks through SiO emission. Case study of the W43-MM1 ridge
Hill, T.; Schneider, N.; Maury, A. +8 more
Aims: Previous literature suggests that the densest structures in the interstellar medium form through colliding flows, but patent evidence of this process is still missing. Recent literature proposes using SiO line emission to trace low-velocity shocks associated with cloud formation through collision. In this paper we investigate the bright…