WorldCat Identities

Delabrouille, Jacques

Overview
Works: 10 works in 16 publications in 2 languages and 62 library holdings
Roles: Thesis advisor, Opponent, 958, Author
Publication Timeline
.
Most widely held works by Jacques Delabrouille
Les nouveaux messagers du cosmos by Nathalie Palanque-Delabrouille( Book )

3 editions published in 2011 in French and held by 43 WorldCat member libraries worldwide

Analyse multi-composantes d'observations du fond diffus cosmologique by Guillaume Patanchon( Book )

2 editions published in 2003 in French and held by 3 WorldCat member libraries worldwide

MODELISATION ET ANALYSE DE MESURES DES ANISOTROPIES DU FOND DE RAYONNEMENT COSMOLOGIQUE = mulation and analysis of cosmic microwave background anisotropy measurements by Jacques Delabrouille( Book )

1 edition published in 1998 in French and held by 3 WorldCat member libraries worldwide

LES ANISOTROPIES DU FOND DE RAYONNEMENT COSMOLOGIQUE CONTIENNENT UNE IMPORTANTE QUANTITE D'INFORMATION CONCERNANT NOTRE UNIVERS. L'ACCES A CETTE INFORMATION EXIGE LA MISE EN OEUVRE DES MOYENS EXPERIMENTAUX PERFORMANTS, ET NECESSITE UNE BONNE COMPREHENSION DES EFFETS INSTRUMENTAUX SUSCEPTIBLES DE PERTURBER LES MESURES. L'ESSENTIEL DE CE TRAVAIL DE THESE EST CENTRE SUR L'ANALYSE DE METHODES OPTIMALES PERMETTANT LA PROJECTION DES DONNEES, C'EST A DIRE A LA PRODUCTION, A PARTIR DE SEQUENCES TEMPORELLES ENREGISTREES LORS D'UN BALAYAGE DU CIEL, DE CARTES A DEUX DIMENSIONS AFFRANCHIES DE TOUS LES ARTEFACTS D'ORIGINE INSTRUMENTALE. EN PREMIER LIEU, LE SIGNAL COSMOLOGIQUE ATTENDU LORS DU BALAYAGE DU CIEL EST CALCULE EN FONCTION DU SPECTRE DES ANISOTROPIES A DEUX DIMENSIONS. CECI PERMET DE COMPARER LES SPECTRES DU SIGNAL ATTENDU ET DU BRUIT, ET L'OPTIMISATION DE CERTAINS PARAMETRES INSTRUMENTAUX. LE DEUXIEME ASPECT ETUDIE EN DETAIL EST CELUI DE LA PRESENCE DE DERIVES TEMPORELLES BASSE FREQUENCE DANS LA SEQUENCE DES DONNEES, SUSCEPTIBLES DE PROVOQUER UN STRIAGE DES CARTES. REPONDANT A CERTAINES CRITIQUES ADRESSEES A L'EGARD DE LA STRATEGIE D'OBSERVATION DE PLANCK, JE MONTRE, AU MOYEN DE SIMULATIONS NUMERIQUES ET DE CALCULS ANALYTIQUES, QUE CELLE-CI PERMET DE S'AFFRANCHIR DES DERIVES BASSE FREQUENCE, AUX PRIX DE CONTRAINTES FACILEMENT SATISFAITES SUR LA CONCEPTION DE LA CHARGE UTILE. J'ABORDE ENSUITE LE PROBLEME DE LA LUMIERE PARASITE PROVENANT DES LOBES LOINTAINS DU DIAGRAMME D'ANTENNE DE PLANCK. EN RAISON DE L'EXTREME SENSIBILITE VISEE, LA REJECTION DU RAYONNEMENT EN PROVENANCE DU SOLEIL, DE LA TERRE ET DE LA GALAXIE A DES NIVEAUX INFERIEURS A CELUI DU BRUIT EST EXTREMEMENT DIFFICILE A ATTEINDRE. IL EST MONTRE COMMENT UN TRAITEMENT ADEQUAT DES DONNEES PERMET D'IDENTIFIER LE SIGNAL EN PROVENANCE DE DIFFERENTES SOURCES, ET AINSI DE RETRANCHER L'EFFET INDESIRABLE DU SIGNAL UTILE. LA DERNIERE PARTIE DE CE TRAVAIL EST CONSACREE A LA PRESENTATION DE L'EXPERIENCE DIABOLO ET DES DONNEES DES OBSERVATIONS EFFECTUEES AU PETIT OBSERVATOIRE MILLIMETRIQUE POM2, SITUE AU PLATEAU DE BURE
Observation des amas de galaxies par effet Sunyaev-Zel'dovich et de la polarisation du fond diffus cosmologique : de Planck à NIKA by Rémi Adam( )

1 edition published in 2015 in French and held by 3 WorldCat member libraries worldwide

The measurement of the matter distribution in the Universe provides valuable tests for cosmology. It can be traced at various steps of the formation of structures using the analysis of the primary and secondary anisotropies in the Cosmic Microwave Background (CMB). This thesis focuses on the data analysis of the observations of the Planck satellite and that of the ground-based camera NIKA installed at the IRAM-30m telescope.The first part introduces the context, focussing on: 1) the inflation, which provides a natural origin for the matter fluctuations seen in the Universe; 2) the reionization, which corresponds to the moment when the first stars form; 3) clusters of galaxy, that are the building blocks of the more recent Universe.The second part focuses on the data reduction of the NIKA data. The development of the data reduction pipeline, allowing to go from raw data to maps, is presented. It is dedicated for the newly developed kinetic inductance detectors used by NIKA. Tools and simulations are also constructed to characterize the maps.The third part is dedicated to the observation and the analysis of galaxy clusters through the Sunyaev-Zel'dovich (SZ) effect, i.e. the inverse Compton interaction of CMB photons and free electrons in clusters. Once recovered, the SZ maps are combined to X-ray data to measure the matter content and thermodynamic properties of the observed clusters. The main results are: the first observation of the SZ effect with kinetic inductance detectors, the measurement of the pressure profile of a high redshift cluster ($z=0.89$), the study of point source contamination in a resolved cluster, and the SZ mapping in a triple merger.The last part is dedicated to the analysis of Planck polarization data. In particular, we discuss large angular scale systematics and the tools developed to identify and correct for them. The large scales CMB polarization data allows both to search for the imprint of the quantum fluctuations generated during inflation, and to measure the reionization
Analyse des données du fond diffus cosmologique : simulation et séparation de composantes by Marc Betoule( )

2 editions published in 2009 in French and held by 3 WorldCat member libraries worldwide

The next generation of experiments dedicated to measuring temperature and polarization anisotropies of the microwave background radiation (CMB), inaugurated with the launch of the Planck satellite, will enable the detection and study of increasingly subtle effects. However, the superposition of astrophysical foreground emissions hinder the analysis of the cosmological signal and will contribute as the main source of uncertainty in the forthcoming measurements. An improved modeling of foreground emissions and the development of statistical methods to extract the cosmological information from this contamination are thus crucial steps in the scientific analysis of incoming datasets. In this work we describe the development of the Planck Sky Model, a tool for modeling and simulating the sky emission. We then make use of these simulations to develop and evaluate statistical treatments of foreground emission. We explore the efficiency of wavelet analysis on the sphere (needlets) in the domain of spectral estimation on incomplete data with inhomogeneous contamination, and design a method for treating small scales contamination induced by point sources in the Planck and WMAP data. We also study the impact of foregrounds on our ability to detect primordial gravitational waves (predicted by inflation) and offer forecasts of the performance of future dedicated experiments
Amas de galaxies et effet Sunyaev-Zel'dovich observations et étude des effets de sélection des sondages by Jean-Baptiste Melin( Book )

2 editions published in 2004 in French and held by 2 WorldCat member libraries worldwide

Amas de galaxies détectés par Planck avec l'effet Sunyaev-Zel'dovich thermique : contraintes cosmologiques et spectre angulaire by Matthieu Roman( Book )

2 editions published between 2014 and 2015 in French and held by 2 WorldCat member libraries worldwide

Within the framework defined by general relativity, modern cosmology faces several challenges among which the nature of dark energy, or the behaviour and evolution of ordinary matter trapped inside dark matter potential wells. Galaxy clusters, the largest gravitationally bound structures of the Universe, are particulary well suited to tackle those key questions. The thermal Sunyaev-Zel'dovich (SZ) effect is the inverse Compton interaction of cosmic microwave background photons off electrons in the dense gas within galaxy clusters. With this effect, Planck detected the largest SZ-selected sample currently existing. This work present the cosmological exploitation of Planck cluster catalog, with the construction of a model for cluster counts. The model includes the choice of a mass function and builds scaling laws relating cluster observables to mass. Then, a specific Planck selection function is computed. Using a gridded likelihood or Markov chains Monte-Carlo, the Planck cosmological constraints are established and discussed. Another probe of density fluctuations and their evolution is studied in this work : the SZ angular power spectrum. The component separation method allowing for the extraction of the SZ spectrum is described, as well as its validation on a set of simulations from the Planck Sky Model. Then, forecasts on galaxy clusters constraints for the next generation space missions are presented
Foreground implications in the scientific exploitation of CMB data by Pietro Procopio( Book )

1 edition published in 2009 in English and held by 1 WorldCat member library worldwide

The first part of my thesis work focus on the CMB photon distribution function. I show the implementations and the updating phases characterizing a numerical integration code (KYPRIX) for the solution of the Kompaneets equation in cosmological context. Physical implementations were also performed: the introduction of the cosmological constant; the choice of the primordial chemical abundances of H and He is now possible; the ionization fractions for the species involved have been introduced; it was created an optional interface that links KYPRIX with codes, like RECFAST, in order to calculate a recombination history of the ionization fraction of H and He. Ail of the physical implementations contributed to perform more realistic simulation of the spectral distortion of the CMB. During my second stage at APC I performed several tests on the Planck Sky Model. The tests involved the latest two release of Galactic emission model, the Galactic foreground template derived by WMAP data and a clean CMB anisotropy map. The last release of the PSM total intensity prediction of the Galactic processes showed results consistent with the previous ones for almost ail the frequencies tested, while it still needs some tuning at 23 GHz, where synchrotron emission and free-free emission are more prominent. I started using SMICA (component separation techniques) during my first stage at APC, in 2007.1 used SMICA, and another filter (FFT filter) I developed, for a reprocessing of the IRIS mapset. A FFT filter was developed for this purpose and I used the filter only on localized regions, not on the full-sky maps. The dramatic improvements obtained on the IRIS maps are clearly visible just by eye
Simulation et modélisation du ciel dans le domaine millimétrique by Guillaume Castex( Book )

1 edition published in 2013 in English and held by 1 WorldCat member library worldwide

This work is dedicated to the modelisation of the sky in the millimeter domain. It has been done in the context of the Planck mission. This thesis starts with a brief introduction to cosmology/ followed by a chapter introducing Planck mission, its scientific context, its data analysis pipeline, and some early results. The next chapter presents the Planck Sky Model (PSM), software and physic models used to make realistic simulations of the sky and its components in the millimeter range. Most of my work has been devoted to participating to its development and its use in the context of the Planck community activities. The Full Focal Plane simulations, made for the Planck community are described in the next chapter. A likelihood model for component separation methods, based on internal linear combination, is then presented. Some basic algorithms and tools dedicated to the point sources processing are then introduced. The final chapter presents a new far infrared background model, now included in the PSM. This model is based on a 3D distribution of galaxies in the infrared background
Etude de la calibration et de la reconstruction des cartes du ciel avec les données Planck-HFI by Clement Filliard( )

1 edition published in 2012 in French and held by 1 WorldCat member library worldwide

 
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.90 (from 0.89 for Les nouvea ... to 0.99 for Etude de l ...)

Languages
French (14)

English (2)