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From 2009 to 2011 I was postdoc at the Laboratoire AstroParticule et Cosmologie in Paris, then at the Institut d'Astrophysique Spatiale in Orsay from 2011 to 2013. I obtained my PhD in theoretical cosmology at the Laboratoire de Physique Théorique in Orsay under the supervision of Martin Bucher.
I have looked at a broad range of topics in Cosmology, going from observational aspects, including:
Component separation, primordial CMB B-modes, Sunyaev-Zeldovich effects, CMB spectral distortions, CMB lensing, 21-cm intensity mapping, and Planck data analysis (also here and here), to more theoretical aspects, e.g. extra-dimensions and cosmological perturbations.
We have revisited the Planck SZ y-map power spectrum analysis by accounting for relativistic temperature corrections, showing that relativistic SZ corrections alleviate the tension on σ8 between CMB and SZ probes. We have also determined the relevant weighting of the average cluster temperature for SZ power spectrum analyses, and shown that it offers a new way to break spectral degeneracy between mass-bias and σ8.Remazeilles, Bolliet, Rotti, Chluba, "Can we neglect relativistic temperature corrections in the Planck thermal SZ analysis?", arXiv:1809.09666
We propose a solution to detect foreground-obscured µ-type spectral distortion anisotropies with future CMB satellites through the enhanced µ-T cross power spectrum, with vanishing residual TT correlations, and to constrain primordial non-Gaussianity on very small scales.Remazeilles and Chluba, "Extracting foreground-obscured µ-distortion anisotropies to constrain primordial non-Gaussianity", MNRAS (2018)
A comprehensive study of the foregrounds and the component separation problem for the search for primordial CMB B-modes, in the context of the proposed CMB space mission CORE.Remazeilles et al., for the CORE collaboration, "Exploring Cosmic Origins with CORE: B-mode Component Separation", JCAP 04 (2018) 023
By applying the component separation method GNILC (Remazeilles et al 2011b) to Planck data, we have managed to disentangle the cosmic infrared background (CIB) and Galactic dust emissions over the full sky. We have obtained new estimates of dust temperature and emissivity, with reduced CIB contamination. The GNILC dust and CIB all-sky maps have been publicly released on the Planck Legacy Archive (see Release PR2 - 2015, Foreground maps, dust or CIB), and featured on the front cover of A&A (vol. 596, Dec 2016)Planck Collaboration (corresponding author: Remazeilles),
"Planck intermediate results. XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies", A&A 596, A109 (2016)
We have compared the sensitivity to the tensor-to-scalar ratio of different CMB B-mode satellite concepts after foreground removal.
We have also quantified the impact on the tensor-to-scalar ratio of incorrect foreground modelling.
Using a needlet internal linear combination (NILC) algorithm (Remazeilles et al 2011a), we have released the first thermal Sunyaev-Zeldovich all-sky map, from which we derived new constraints on the amplitude of dark matter fluctuations. Please follow this link to download the Planck NILC SZ map.Planck Collaboration (co-corresponding author: Remazeilles),
"Planck 2015 results. XXII. A map of the thermal Sunyaev-Zeldovich effect", A&A 594, A22 (2016)
We have reprocessed the Haslam et al map to release a significantly improved template of Galactic synchrotron radiation at 408 MHz in terms of subtraction of systematics and extra-galactic radio sources. Please download the Reprocessed Haslam 408 MHz map on the NASA LAMBDA dedicated webpage.Remazeilles et al., "An improved source-subtracted and destriped 408 MHz all-sky map", MNRAS (2015)
Jodrell Bank Centre for Astrophysics
School of Physics & Astronomy
The University of Manchester
Manchester M13 9PL, U.K.
phone: +44 (0)161 275 4142
E-mail: mathieu "dot" remazeilles "at" manchester "dot" ac "dot" uk