Profil de Anthony BANDAY
Email : anthony.bandaySPAMFILTER@irap.omp.eu
Téléphone / phone: +33 5 61 55 77 78
Bureau / office : J037
Institution : CNRS
Statut / status: Chercheur
I undertake research on the Cosmic Microwave Background (CMB) with particular emphasis on data analysis and phenomenology. I have authored or co-authored more than 100 refereed publications and have professional expertise in space science dating back to the COBE-DMR project that unambiguously detected structure in the CMB for the first time in 1992. My current focus is in the areas of Galactic foreground emission and its removal from microwave observations, and the search for cosmological non-Gaussianity and deviations from isotropy. I am a member of the Planck collaboration and PI or Co-I of two research areas in the key science program. I am also involved within France and Europe to join the LiteBIRD satellite project to study the signature of inflationary gravitational waves (so-called B-modes) in the CMB.
I was a recipient of an Agence Nationale de Recherche Chaire d'excellence (ANR-08-CEXC-0002-01) between December 2008 and December 2012. This provided specific support on the project Confronting the Copernican Principle and Cosmological Isotropy with CMB temperature and polarisation data. The research program attempted to test the fundamental assumptions of cosmology - that of homogeneity and isotropy - or at least to place stringent limits on observed deviations from the so-called concordance cosmological model which has its theoretical basis firmly rooted in the inflationary paradigm. These propositions were tested using observations of the CMB. However, the microwave sky is manifestly anisotropic, principally due to the presence of diffuse emission from our own Galaxy. Thus other questions had to be addressed in detail, related both to the nature of the Galactic foreground emission, and to the statistical properties of fluctuations in the CMB, in both temperature and polarisation.
This led to a series of publications including the following.
Modelling the Galactic magnetic field on the plane in two dimensions. Jaffe, T.R., Leahy, J.P.,Banday, A.J., Leach, S.M., Lowe, S.R. & Wilkinson, A., 2010. MNRAS, 401, 1013. (arXiv:0907.3994)
Constraints on the topology of the Universe derived from the 7-year WMAP data. Bielewicz, P. & Banday, A.J., 2011. MNRAS, 412, 2104. (arXiv:1012.3549)
Connecting synchrotron, cosmic rays and magnetic fields in the plane of the Galaxy. Jaffe, T.R.,Banday, A.J., Leahy, J.P., Leach, S. & Strong, A.W.,2011. MNRAS, 416, 1152. (arXiv:1105.5885)
Constraining the topology of the Universe using the polarized cosmic microwave background maps. Bielewicz, P.,Banday, A. J. & Górski, K. M., 2012. MNRAS 421, 1064. (arXiv:1111.6046)
Foreground analysis using cross-correlations of external templates on the 7-year Wilkinson Microwave Anisotropy Probe data. Ghosh, T.,Banday, A.J.,Jaffe, T, Dickinson, C., Davies, R., Davis, R. & Górski, K.M., 2012. MNRAS, 422, 3617. (arXiv:1112.0509)
Template fitting of WMAP 7-year data: anomalous dust or flattening synchrotron emission? Peel, M. W., Dickinson, C., Davies, R. D.,Banday, A. J.,Jaffe, T. R. & Jonas, J. L., 2012. MNRAS, 424, 2676. (arXiv:1112.0432)
A search for concentric rings with unusual variance in the 7-year WMAP temperature maps using a fast convolution approach. Bielewicz, P., Wandelt, B. D. &Banday, A. J., in press. (arXiv:1207.6905)