Search Publications
Planck intermediate results. XLIX. Parity-violation constraints from polarization data
Miville-Deschênes, M. -A.; Bernard, J. -P.; Planck Collaboration +148 more
Parity-violating extensions of the standard electromagnetic theory cause in vacuo rotation of the plane of polarization of propagating photons. This effect, also known as cosmic birefringence, has an impact on the cosmic microwave background (CMB) anisotropy angular power spectra, producing non-vanishing T-B and E-B correlations that are otherwise…
Spectro-photometric distances to stars: A general purpose Bayesian approach
Schneider, Donald P.; Steinmetz, Matthias; Girardi, Léo +16 more
Context. Determining distances to individual field stars is a necessary step towards mapping Galactic structure and determining spatial variations in the chemo-dynamical properties of stellar populations in the Milky Way.
Aims: In order to provide stellar distance estimates for various spectroscopic surveys, we have developed a code that esti…
Planck 2015 results. II. Low Frequency Instrument data processings
Bernard, J. -P.; Planck Collaboration; Ade, P. A. R. +214 more
We present an updated description of the Planck Low Frequency Instrument (LFI) data processing pipeline, associated with the 2015 data release. We point out the places where our results and methods have remained unchanged since the 2013 paper and we highlight the changes made for the 2015 release, describing the products (especially timelines) and…
The XXL Survey. III. Luminosity-temperature relation of the bright cluster sample
Smith, G. P.; Chiappetti, L.; Pierre, M. +13 more
Context. The XXL Survey is the largest homogeneous survey carried out with XMM-Newton. Covering an area of 50 deg2, the survey contains several hundred galaxy clusters out to a redshift of ~2 above an X-ray flux limit of ~5 × 10-15 erg cm-2 s-1. This paper belongs to the first series of XXL papers focusi…
Measures of galaxy dust and gas mass with Herschel photometry and prospects for ALMA
Berta, S.; Lutz, D.; Genzel, R. +2 more
Combining the deepest Herschel extragalactic surveys (PEP, GOODS-H, HerMES), and Monte Carlo mock catalogs, we explore the robustness of dust mass estimates based on modeling of broadband spectral energy distributions (SEDs) with two popular approaches: Draine & Li (2007, ApJ, 657, 810; DL07) and a modified blackbody (MBB). We analyze the caus…
Flat rotation curves and low velocity dispersions in KMOS star-forming galaxies at z ~ 1
Miller, S. H.; Fraternali, F.; Di Teodoro, E. M.
The study of the evolution of star-forming galaxies requires the determination of accurate kinematics and scaling relations out to high redshift. In this paper we select a sample of 18 galaxies at z ~ 1, observed in the Hα emission line with KMOS, to derive accurate kinematics using a novel 3D analysis technique. We use the new code 3DB…
Planck intermediate results. XXXIII. Signature of the magnetic field geometry of interstellar filaments in dust polarization maps
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +190 more
Planck observations at 353 GHz provide the first fully sampled maps of the polarized dust emission towards interstellar filaments and their backgrounds (I.e., the emission observed in the surroundings of the filaments). The data allow us to determine the intrinsic polarization properties of the filaments and therefore to provide insight into the s…
A rigorous detection of interstellar CH3NCO: An important missing species in astrochemical networks
Cernicharo, J.; Tercero, B.; Guillemin, J. -C. +8 more
The recent analysis of the composition of the frozen surface of comet 67P/Churyumov-Gerasimenko has revealed a significant number of complex organic molecules. Methyl isocyanate (CH3NCO) is one of the more abundant species detected on the comet surface. In this work we report extensive characterization of its rotational spectrum resulti…
Detection of exposed H2O ice on the nucleus of comet 67P/Churyumov-Gerasimenko. as observed by Rosetta OSIRIS and VIRTIS instruments
Jorda, L.; Lamy, P. L.; Bertaux, J. -L. +63 more
Context. Since the orbital insertion of the Rosetta spacecraft, comet 67P/Churyumov-Gerasimenko (67P) has been mapped by OSIRIS camera and VIRTIS spectro-imager, producing a huge quantity of images and spectra of the comet's nucleus.
Aims: The aim of this work is to search for the presence of H2O on the nucleus which, in general, a…
Towards universal hybrid star formation rate estimators
Boquien, M.; De Looze, I.; Pellegrini, E. +13 more
Context. To compute the star formation rate (SFR) of galaxies from the rest-frame ultraviolet (UV), it is essential to take the obscuration by dust into account. To do so, one of the most popular methods consists in combining the UV with the emission from the dust itself in the infrared (IR). Yet, different studies have derived different estimator…