Search Publications
Planck intermediate results. LI. Features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters
Kim, J.; Miville-Deschênes, M. -A.; Planck Collaboration +155 more
The six parameters of the standard ΛCDM model have best-fit values derived from the Planck temperature power spectrum that are shifted somewhat from the best-fit values derived from WMAP data. These shifts are driven by features in the Planck temperature power spectrum at angular scales that had never before been measured to cosmic-variance level …
The impact of clustering and angular resolution on far-infrared and millimeter continuum observations
Daddi, Emanuele; Béthermin, Matthieu; Wu, Hao-Yi +7 more
Follow-up observations at high-angular resolution of bright submillimeter galaxies selected from deep extragalactic surveys have shown that the single-dish sources are comprised of a blend of several galaxies. Consequently, number counts derived from low- and high-angular-resolution observations are in tension. This demonstrates the importance of …
Fibers in the NGC 1333 proto-cluster
Alves, J.; Tafalla, M.; Hacar, A.
Are the initial conditions for clustered star formation the same as for non-clustered star formation? To investigate the initial gas properties in young proto-clusters we carried out a comprehensive and high-sensitivity study of the internal structure, density, temperature, and kinematics of the dense gas content of the NGC 1333 region in Perseus,…
The relation between the column density structures and the magnetic field orientation in the Vela C molecular complex
Ade, P. A. R.; Martin, P. G.; Netterfield, C. B. +27 more
We statistically evaluated the relative orientation between gas column density structures, inferred from Herschel submillimetre observations, and the magnetic field projected on the plane of sky, inferred from polarized thermal emission of Galactic dust observed by the Balloon-borne Large-Aperture Submillimetre Telescope for Polarimetry (BLASTPol)…
2WHSP: A multi-frequency selected catalogue of high energy and very high energy γ-ray blazars and blazar candidates
Giommi, P.; Padovani, P.; Chang, Y. -L. +1 more
Aims: High synchrotron peaked blazars (HSPs) dominate the γ-ray sky at energies higher than a few GeV; however, only a few hundred blazars of this type have been cataloged so far. In this paper we present the 2WHSP sample, the largest and most complete list of HSP blazars available to date, which is an expansion of the 1WHSP catalogue of γ-ra…
Cosmic rays, gas and dust in nearby anticentre clouds. I. CO-to-H2 conversion factors and dust opacities
Marshall, D. J.; Casandjian, J. M.; Grenier, I. A. +1 more
Aims: We aim to explore the capabilities of dust emission and γ rays for probing the properties of the interstellar medium in the nearby anti-centre region, using γ-ray observations with the Fermi Large Area Telescope (LAT), and the thermal dust optical depth inferred from Planck and IRAS observations. We also aim to study massive star-formin…
Planck intermediate results. L. Evidence of spatial variation of the polarized thermal dust spectral energy distribution and implications for CMB B-mode analysis
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +156 more
The characterization of the Galactic foregrounds has been shown to be the main obstacle in thechallenging quest to detect primordial B-modes in the polarized microwave sky. We make use of the Planck-HFI 2015 data release at high frequencies to place new constraints on the properties of the polarized thermal dust emission at high Galactic latitudes…
Statistical simulations of the dust foreground to cosmic microwave background polarization
Boulanger, F.; Aumont, J.; Ghosh, T. +6 more
The characterization of the dust polarization foreground to the cosmic microwave background (CMB) is a necessary step toward the detection of the B-mode signal associated with primordial gravitational waves. We present a method to simulate maps of polarized dust emission on the sphere that is similar to the approach used for CMB anisotropies. This…
Cosmological constraints on the neutrino mass including systematic uncertainties
Couchot, F.; Henrot-Versillé, S.; Perdereau, O. +4 more
When combining cosmological and oscillations results to constrain the neutrino sector, the question of the propagation of systematic uncertainties is often raised. We address this issue in the context of the derivation of an upper bound on the sum of the neutrino masses (Σmν) with recent cosmological data. This work is performed within …
Calibrating the Planck cluster mass scale with CLASH
Bartlett, J. G.; Evrard, A. E.; Rykoff, E. +5 more
We determine the mass scale of Planck galaxy clusters using gravitational lensing mass measurements from the Cluster Lensing And Supernova survey with Hubble (CLASH). We have compared the lensing masses to the Planck Sunyaev-Zeldovich (SZ) mass proxy for 21 clusters in common, employing a Bayesian analysis to simultaneously fit an idealized CLASH …