Search Publications
Weeds: a CLASS extension for the analysis of millimeter and sub-millimeter spectral surveys
Maret, S.; Pety, J.; Hily-Blant, P. +2 more
The advent of large instantaneous bandwidth receivers and high spectral resolution spectrometers on (sub-)millimeter telescopes has opened up the possibilities for unbiased spectral surveys. Because of the large amount of data they contain, any analysis of these surveys requires dedicated software tools. Here we present an extension of the widely …
Planck early results. XXI. Properties of the interstellar medium in the Galactic plane
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +199 more
Planck has observed the entire sky from 30 GHz to 857GHz. The observed foreground emission contains contributions from different phases of the interstellar medium (ISM). We have separated the observed Galactic emission into the different gaseous components (atomic, molecular and ionised) in each of a number of Galactocentric rings. This technique …
Planck early results. VI. The High Frequency Instrument data processing
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +163 more
We describe the processing of the 336 billion raw data samples from the High Frequency Instrument (HFI) which we performed to produce six temperature maps from the first 295 days of Planck-HFI survey data. These maps provide an accurate rendition of the sky emission at 100, 143, 217, 353, 545 and 857 GHz with an angular resolution ranging from 9.9…
SDO AIA and Hinode EIS observations of "warm" loops
Mason, H. E.; Del Zanna, G.; O'Dwyer, B.
We present simultaneous observations of active region "warm" (1 MK) loops using the Solar Dynamics Observatory (SDO) Atmospheric Imaging Assembly (AIA) and Hinode EUV Imaging Spectrometer (EIS). Sample EIS spectra for a loop footpoint and a lop leg region are presented, and are used to describe the spectral lines which contribute to the six AIA EU…
MESS (Mass-loss of Evolved StarS), a Herschel key program
Ivison, R. J.; Blommaert, J. A. D. L.; Olofsson, G. +39 more
MESS (Mass-loss of Evolved StarS) is a guaranteed time key program that uses the PACS and SPIRE instruments on board the Herschel space observatory to observe a representative sample of evolved stars, that include asymptotic giant branch (AGB) and post-AGB stars, planetary nebulae and red supergiants, as well as luminous blue variables, Wolf-Rayet…
Planck early results. III. First assessment of the Low Frequency Instrument in-flight performance
Baccigalupi, C.; Banday, A. J.; Barreiro, R. B. +158 more
The scientific performance of the Planck Low Frequency Instrument (LFI) after one year of in-orbit operation is presented. We describe the main optical parameters and discuss photometric calibration, white noise sensitivity, and noise properties. A preliminary evaluation of the impact of the main systematic effects is presented. For each of the pe…
HIFLUGCS: Galaxy cluster scaling relations between X-ray luminosity, gas mass, cluster radius, and velocity dispersion
Zhang, Y. -Y.; Böhringer, H.; Girardi, M. +5 more
We present relations between X-ray luminosity and velocity dispersion (L - σ), X-ray luminosity and gas mass (L - Mgas), and cluster radius and velocity dispersion (r500 - σ) for 62 galaxy clusters in the HIFLUGCS, an X-ray flux-limited sample minimizing bias toward any cluster morphology. Our analysis in total is based on ~ …
Intermittent heating in the solar corona employing a 3D MHD model
Peter, H.; Bingert, S.
Aims: We investigate the spatial and temporal evolution of the heating of the corona of a cool star such as our Sun in a three-dimensional magneto-hydrodynamic (3D MHD) model.
Methods: We solve the 3D MHD problem numerically in a box representing part of the (solar) corona. The energy balance includes Spitzer heat conduction along the ma…
Planck early results. XII. Cluster Sunyaev-Zeldovich optical scaling relations
Kneissl, R.; Dahle, H.; Miville-Deschênes, M. -A. +202 more
We present the Sunyaev-Zeldovich (SZ) signal-to-richness scaling relation (Y500 - N200) for the MaxBCG cluster catalogue. Employing a multi-frequency matched filter on the Planck sky maps, we measure the SZ signal for each cluster by adapting the filter according to weak-lensing calibrated mass-richness relations (N200
Reflection in Seyfert galaxies and the unified model of AGN
Paltani, S.; Walter, R.; Ricci, C. +1 more
We present a deep study of the average hard X-ray spectra of Seyfert galaxies. We aim to test the unified model of active galactic nuclei, and constrain differences and similarities between different classes of objects. We analyzed all public INTEGRAL IBIS/ISGRI data available on all the 165 Seyfert galaxies detected at z < 0.2. Our final sampl…