Search Publications
Baryon acoustic oscillations in the Lyα forest of BOSS DR11 quasars
Pâris, Isabelle; Petitjean, Patrick; Aubourg, Éric +35 more
We report a detection of the baryon acousticoscillation (BAO) feature in the flux-correlation function of the Lyα forest of high-redshift quasars with a statistical significance of five standard deviations. The study uses 137 562 quasars in the redshift range 2.1 ≤ z ≤ 3.5 from the data release 11 (DR11) of the Baryon Oscillation Spectroscopic Sur…
The Herschel view of the dominant mode of galaxy growth from z = 4 to the present day
Magnelli, B.; Aussel, H.; Daddi, E. +20 more
We present an analysis of the deepest Herschel images in four major extragalactic fields GOODS-North, GOODS-South, UDS, and COSMOS obtained within the GOODS-Herschel and CANDELS-Herschel key programs. The star formation picture provided by a total of 10 497 individual far-infrared detections is supplemented by the stacking analysis of a mass compl…
A census of dense cores in the Aquila cloud complex: SPIRE/PACS observations from the Herschel Gould Belt survey
Martin, P. G.; Hill, T.; White, G. J. +29 more
We present and discuss the results of the Herschel Gould Belt survey (HGBS) observations in an 11 deg2 area of the Aquila molecular cloud complex at d 260 pc, imaged with the SPIRE and PACS photometric cameras in parallel mode from 70 µm to 500 µm. Using the multi-scale, multi-wavelength source extraction algorithm getsource…
Planck intermediate results. XIX. An overview of the polarized thermal emission from Galactic dust
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +200 more
This paper presents an overview of the polarized sky as seen by Planck HFI at 353 GHz, which is the most sensitive Planck channel for dust polarization. We construct and analyse maps of dust polarization fraction and polarization angle at 1° resolution, taking into account noise bias and possible systematic effects. The sensitivity of the Planck H…
The VIMOS Ultra-Deep Survey: ~10 000 galaxies with spectroscopic redshifts to study galaxy assembly at early epochs 2 < z ≃ 6
Maccagni, D.; Cimatti, A.; Ilbert, O. +42 more
We present the VIMOS Ultra Deep Survey (VUDS), a spectroscopic redshift survey of ~10 000 very faint galaxies to study the main phase of galaxy assembly in 2 < z ≃ 6. The survey covers 1 deg2 in three separate fields: COSMOS, ECDFS, and VVDS-02h, with the selection of targets based on an inclusive combination of photometric redshifts…
Faint AGNs at z > 4 in the CANDELS GOODS-S field: looking for contributors to the reionization of the Universe
Dickinson, M.; Salvato, M.; Fiore, F. +14 more
Context. Establishing the number of faint active galactic nuclei (AGNs) at z = 4-6 is crucial to understanding their cosmological importance as main contributors to the reionization of the Universe.
Aims: In order to derive the AGN contribution to the cosmological ionizing emissivity we have selected faint AGN candidates at z> 4 in the CAN…
Inventory of the volatiles on comet 67P/Churyumov-Gerasimenko from Rosetta/ROSINA
De Keyser, Johan; Gombosi, Tamas I.; Berthelier, Jean-Jacques +15 more
Context. The ESA Rosetta spacecraft (S/C) is tracking comet 67P/Churyumov-Gerasimenko in close vicinity. This prolonged encounter enables studying the evolution of the volatile coma composition.
Aims: Our work aims at comparing the diversity of the coma of 67P/Churyumov-Gerasimenko at large heliocentric distance to study the evolution of the …
Using Lyman-α to detect galaxies that leak Lyman continuum
Verhamme, Anne; Hayes, Matthew; Schaerer, Daniel +1 more
Aims: We propose to infer the output of the ionising continuum-leaking properties of galaxies based upon their Lyα line profiles.
Methods: We carried out Lyα radiation transfer calculations in two models of H ii regions. These models are porous to ionising continuum escape: 1) we define Lyman-continuum (LyC) optically thin star clusters,…
The Tycho-Gaia astrometric solution . How to get 2.5 million parallaxes with less than one year of Gaia data
Michalik, Daniel; Lindegren, Lennart; Hobbs, David
Context. The first release of astrometric data from Gaia will contain the mean stellar positions and magnitudes from the first year of observations, and proper motions from the combination of Gaia data with Hipparcos prior information (HTPM).
Aims: We study the potential of using the positions from the Tycho-2 Catalogue as additional informat…
The galaxy stellar mass function at 3.5 ≤z ≤ 7.5 in the CANDELS/UDS, GOODS-South, and HUDF fields
Ferguson, H. C.; Finkelstein, S. L.; Giavalisco, M. +38 more
Context. The form and evolution of the galaxy stellar mass function (GSMF) at high redshifts provide crucial information on star formation history and mass assembly in the young Universe, close or even prior to the epoch of reionization.
Aims: We used the unique combination of deep optical/near-infrared/mid-infrared imaging provided by HST, S…