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Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
Prusti, T.; Mazeh, T.; Zucker, S. +589 more
Context. At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7.
Aims: A summary of Gaia DR1 is presented along with illustrations of the scientific quality of the data, followed by a discussion of the limitat…
Planck 2015 results. I. Overview of products and scientific results
Böhringer, H.; Kneissl, R.; Kim, J. +367 more
The European Space Agency's Planck satellite, which is dedicated to studying the early Universe and its subsequent evolution, was launched on 14 May 2009. It scanned the microwave and submillimetre sky continuously between 12 August 2009 and 23 October 2013. In February 2015, ESA and the Planck Collaboration released the second set of cosmology pr…
Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +221 more
This paper presents the Planck 2015 likelihoods, statistical descriptions of the 2-point correlationfunctions of the cosmic microwave background (CMB) temperature and polarization fluctuations that account for relevant uncertainties, both instrumental and astrophysical in nature. They are based on the same hybrid approach used for the previous rel…
Planck 2015 results. XIV. Dark energy and modified gravity
Miville-Deschênes, M. -A.; Bernard, J. -P.; Planck Collaboration +234 more
We study the implications of Planck data for models of dark energy (DE) and modified gravity (MG) beyond the standard cosmological constant scenario. We start with cases where the DE only directly affects the background evolution, considering Taylor expansions of the equation of state w(a), as well as principal component analysis and parameterizat…
Planck 2015 results. XXIV. Cosmology from Sunyaev-Zeldovich cluster counts
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +233 more
We present cluster counts and corresponding cosmological constraints from the Planck full mission data set. Our catalogue consists of 439 clusters detected via their Sunyaev-Zeldovich (SZ) signal down to a signal-to-noise ratio of 6, and is more than a factor of 2 larger than the 2013 Planck cluster cosmology sample. The counts are consistent with…
Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
Kim, J.; Miville-Deschênes, M. -A.; Boulanger, F. +239 more
The Planck full mission cosmic microwave background (CMB) temperature and E-mode polarization maps are analysed to obtain constraints on primordial non-Gaussianity (NG). Using three classes of optimal bispectrum estimators - separable template-fitting (KSW), binned, and modal - we obtain consistent values for the primordial local, equilateral, and…
Planck 2015 results. XXVII. The second Planck catalogue of Sunyaev-Zeldovich sources
Böhringer, H.; Kneissl, R.; Dahle, H. +257 more
We present the all-sky Planck catalogue of Sunyaev-Zeldovich (SZ) sources detected from the 29 month full-mission data. The catalogue (PSZ2) is the largest SZ-selected sample of galaxy clusters yet produced and the deepest systematic all-sky surveyof galaxy clusters. It contains 1653 detections, of which 1203 are confirmed clusters with identified…
Gaia Data Release 1. Astrometry: one billion positions, two million proper motions and parallaxes
Mora, A.; Jordan, S.; Figueras, F. +80 more
Context. Gaia Data Release 1 (DR1) contains astrometric results for more than 1 billion stars brighter than magnitude 20.7 based on observations collected by the Gaia satellite during the first 14 months of its operational phase.
Aims: We give a brief overview of the astrometric content of the data release and of the model assumptions, data p…
Planck 2015 results. X. Diffuse component separation: Foreground maps
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +237 more
Planck has mapped the microwave sky in temperature over nine frequency bands between 30 and 857 GHz and in polarization over seven frequency bands between 30 and 353 GHz in polarization. In this paper we consider the problem of diffuse astrophysical component separation, and process these maps within a Bayesian framework to derive an internally co…
Planck 2015 results. XV. Gravitational lensing
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +227 more
We present the most significant measurement of the cosmic microwave background (CMB) lensing potential to date (at a level of 40σ), using temperature and polarization data from the Planck 2015 full-mission release. Using a polarization-only estimator, we detect lensing at a significance of 5σ. We cross-check the accuracy of our measurement using t…