Search Publications
The quiescent intracluster medium in the core of the Perseus cluster
Done, Chris; Safi-Harb, Samar; Hamaguchi, Kenji +213 more
Clusters of galaxies are the most massive gravitationally bound objects in the Universe and are still forming. They are thus important probes of cosmological parameters and many astrophysical processes. However, knowledge of the dynamics of the pervasive hot gas, the mass of which is much larger than the combined mass of all the stars in the clust…
Planck 2015 results. XIX. Constraints on primordial magnetic fields
Kim, J.; Miville-Deschênes, M. -A.; Bernard, J. -P. +230 more
We compute and investigate four types of imprint of a stochastic background of primordial magnetic fields (PMFs) on the cosmic microwave background (CMB) anisotropies: the impact of PMFs on the CMB temperature and polarization spectra, which is related to their contribution to cosmological perturbations; the effect on CMB polarization induced by F…
UV-extended E-MILES stellar population models: young components in massive early-type galaxies
Koleva, M.; Falcón-Barroso, J.; Ricciardelli, E. +2 more
We present UV-extended E-MILES stellar population synthesis models covering the spectral range λλ 1680-50 000 Å at moderately high resolution. We employ the NGSL space-based stellar library to compute spectra of single-age, single-metallicity stellar populations in the wavelength range from 1680 to 3540 Å. These models represent a significant impr…
A unified multiwavelength model of galaxy formation
Baugh, Carlton M.; Lagos, Claudia D. P.; Cole, Shaun +7 more
We present a new version of the GALFORM semi-analytical model of galaxy formation. This brings together several previous developments of GALFORM into a single unified model, including a different initial mass function (IMF) in quiescent star formation and in starbursts, feedback from active galactic nuclei suppressing gas cooling in massive haloes…
Modelling and interpreting spectral energy distributions of galaxies with BEAGLE
Charlot, Stéphane; Chevallard, Jacopo
We present a new-generation tool to model and interpret spectral energy distributions (SEDs) of galaxies, which incorporates in a consistent way the production of radiation and its transfer through the interstellar and intergalactic media. This flexible tool, named BEAGLE (for BayEsian Analysis of GaLaxy sEds), allows one to build mock galaxy cata…
Prebiotic chemicals--amino acid and phosphorus--in the coma of comet 67P/Churyumov-Gerasimenko
Wurz, P.; Bochsler, P.; Altwegg, K. +29 more
The importance of comets for the origin of life on Earth has been advocated for many decades. Amino acids are key ingredients in chemistry, leading to life as we know it. Many primitive meteorites contain amino acids, and it is generally believed that these are formed by aqueous alterations. In the collector aerogel and foil samples of the Stardus…
Development of the Model of Galactic Interstellar Emission for Standard Point-source Analysis of Fermi Large Area Telescope Data
Troja, E.; Caraveo, P. A.; Mirabal, N. +131 more
Most of the celestial γ rays detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope originate from the interstellar medium when energetic cosmic rays interact with interstellar nucleons and photons. Conventional point-source and extended-source studies rely on the modeling of this diffuse emission for accurate char…
Fermi GBM Observations of LIGO Gravitational-wave Event GW150914
McBreen, S.; Meegan, C. A.; McEnery, J. E. +32 more
With an instantaneous view of 70% of the sky, the Fermi Gamma-ray Burst Monitor (GBM) is an excellent partner in the search for electromagnetic counterparts to gravitational-wave (GW) events. GBM observations at the time of the Laser Interferometer Gravitational-wave Observatory (LIGO) event GW150914 reveal the presence of a weak transient above 5…
Planck 2015 results. XXII. A map of the thermal Sunyaev-Zeldovich effect
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +199 more
We have constructed all-sky Compton parameters maps, y-maps, of the thermal Sunyaev-Zeldovich (tSZ) effect by applying specifically tailored component separation algorithms to the 30 to 857 GHz frequency channel maps from the Planck satellite. These reconstructed y-maps are delivered as part of the Planck 2015 release. The y-maps are characterized…
Planck intermediate results. XXXV. Probing the role of the magnetic field in the formation of structure in molecular clouds
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +195 more
Within ten nearby (d < 450 pc) Gould belt molecular clouds we evaluate statistically the relative orientation between the magnetic field projected on the plane of sky, inferred from the polarized thermal emission of Galactic dust observed by Planck at 353 GHz, and the gas column density structures, quantified by the gradient of the column densi…