Search Publications
Planck 2015 results. XII. Full focal plane simulations
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +228 more
We present the 8th full focal plane simulation set (FFP8), deployed in support of the Planck 2015 results. FFP8 consists of 10 fiducial mission realizations reduced to 18 144 maps, together with the most massive suite of Monte Carlo realizations of instrument noise and CMB ever generated, comprising 104 mission realizations reduced to a…
Planck intermediate results. XXIX. All-sky dust modelling with Planck, IRAS, and WISE observations
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +195 more
We present all-sky modelling of the high resolution Planck, IRAS, and WISE infrared (IR) observations using the physical dust model presented by Draine & Li in 2007 (DL, ApJ, 657, 810). We study the performance and results of this model, and discuss implications for future dust modelling. The present work extends the DL dust modelling carried …
High-mass X-ray binaries in the Small Magellanic Cloud
Haberl, F.; Sturm, R.
Aims: The last comprehensive catalogue of high-mass X-ray binaries in the Small Magellanic Cloud (SMC) was published about ten years ago. Since then new such systems were discovered, mainly by X-ray observations with Chandra and XMM-Newton. For the majority of the proposed HMXBs in the SMC no X-ray pulsations were discovered as yet, and unles…
The population of X-ray supernova remnants in the Large Magellanic Cloud
Pietsch, W.; Haberl, F.; Greiner, J. +11 more
Aims: We present a comprehensive X-ray study of the population of supernova remnants (SNRs) in the Large Magellanic Cloud (LMC). Using primarily XMM-Newton observations, we conduct a systematic spectral analysis of LMC SNRs to gain new insight into their evolution and the interplay with their host galaxy.
Methods: We combined all the arc…
An evaporating planet in the wind: stellar wind interactions with the radiatively braked exosphere of GJ 436 b
Vidotto, A. A.; Ehrenreich, D.; Lecavelier des Etangs, A. +2 more
Observations of the warm Neptune GJ 436 b were performed with HST/STIS at three different epochs (2012, 2013, 2014) in the stellar Lyman-α line. They showed deep, repeated transits that were attributed to a giant exosphere of neutral hydrogen. The low radiation pressure from the M-dwarf host star was shown to play a major role in the dynamics of t…
Gamma-ray spectroscopy of positron annihilation in the Milky Way
Diehl, Roland; Greiner, Jochen; Siegert, Thomas +5 more
Context. The annihilation of positrons in the Galaxy's interstellar medium produces characteristic gamma-rays with a line at 511 keV. This gamma-ray emission has been observed with the spectrometer SPI on ESA's INTEGRAL observatory, confirming a puzzling morphology with bright emission from an extended bulge-like region, while emission from the di…
The XXL Survey. II. The bright cluster sample: catalogue and luminosity function
Smith, G. P.; Chiappetti, L.; Altieri, B. +40 more
Context. The XXL Survey is the largest survey carried out by the XMM-Newton satellite and covers a total area of 50 square degrees distributed over two fields. It primarily aims at investigating the large-scale structures of the Universe using the distribution of galaxy clusters and active galactic nuclei as tracers of the matter distribution. The…
Planck intermediate results. XLII. Large-scale Galactic magnetic fields
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +175 more
Recent models for the large-scale Galactic magnetic fields in the literature have been largely constrained by synchrotron emission and Faraday rotation measures. We use three different but representative models to compare their predicted polarized synchrotron and dust emission with that measured by the Planck satellite. We first update these model…
CLASH-VLT: A highly precise strong lensing model of the galaxy cluster RXC J2248.7-4431 (Abell S1063) and prospects for cosmography
Zitrin, A.; Grillo, C.; Tozzi, P. +32 more
Aims: We perform a comprehensive study of the total mass distribution of the galaxy cluster RXC J2248.7-4431 (z = 0.348) with a set of high-precision strong lensing models, which take advantage of extensive spectroscopic information on many multiply lensed systems. In the effort to understand and quantify inherent systematics in parametric st…
The physical and chemical structure of Sagittarius B2. I. Three-dimensional thermal dust and free-free continuum modeling on 100 au to 45 pc scales
Csengeri, T.; Comito, C.; Schilke, P. +8 more
Context. We model the dust and free-free continuum emission in the high-mass star-forming region Sagittarius B2.
Aims: We want to reconstruct the 3D density and dust temperature distribution, as a crucial input to follow-up studies of the gas velocity field and molecular abundances.
Methods: We employ the 3D radiative transfer program RA…