Zobrazeno 1 - 10
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pro vyhledávání: '"de Belsunce, Roger"'
We present a novel maximum a posteriori estimator to jointly estimate band-powers and the covariance of the three-dimensional power spectrum (P3D) of Lyman-alpha forest flux fluctuations, called MAPLE. Our Wiener-filter based algorithm reconstructs a
Externí odkaz:
http://arxiv.org/abs/2403.17294
Autor:
de Belsunce, Roger, Philcox, Oliver H. E., Irsic, Vid, McDonald, Patrick, Guy, Julien, Palanque-Delabrouille, Nathalie
Publikováno v:
MNRAS 533, 3756-3770 (2024)
We measure the three-dimensional power spectrum (P3D) of the transmitted flux in the Lyman-a (Ly-a) forest using the complete extended Baryon Oscillation Spectroscopic Survey data release 16 (eBOSS DR16). This sample consists of 205,012 quasar spectr
Externí odkaz:
http://arxiv.org/abs/2403.08241
We present constraints on primordial B modes from large angular scale cosmic microwave background polarisation anisotropies measured with the Planck satellite. To remove Galactic polarised foregrounds, we use a Bayesian parametric component separatio
Externí odkaz:
http://arxiv.org/abs/2207.04903
We present a Bayesian parametric component separation method for polarised microwave sky maps. We solve jointly for the primary cosmic microwave background (CMB) signal and the main Galactic polarised foreground components. For the latter, we conside
Externí odkaz:
http://arxiv.org/abs/2205.13968
Autor:
Wang, Ben, Zou, Jiaqi, Cai, Zheng, Prochaska, J. Xavier, Sun, Zechang, Ding, Jiani, Font-Ribera, Andreu, Gonzalez, Alma, Herrera-Alcantar, Hiram K., Irsic, Vid, Lin, Xiaojing, Brooks, David, Chabanier, Solène, de Belsunce, Roger, Palanque-Delabrouille, Nathalie, Tarle, Gregory, Zhou, Zhimin
We have updated and applied a convolutional neural network (CNN) machine learning model to discover and characterize damped Ly$\alpha$ systems (DLAs) based on Dark Energy Spectroscopic Instrument (DESI) mock spectra. We have optimized the training pr
Externí odkaz:
http://arxiv.org/abs/2201.00827
Publikováno v:
MNRAS 507, 1072-1091 (2021)
This paper explores methods for constructing low multipole temperature and polarisation likelihoods from maps of the cosmic microwave background anisotropies that have complex noise properties and partial sky coverage. We use Planck 2018 High Frequen
Externí odkaz:
http://arxiv.org/abs/2103.14378
Autor:
de Belsunce, Roger, Senatore, Leonardo
Publikováno v:
JCAP02(2019)038
We compute the tree-level bispectrum of dark matter in the presence of massive neutrinos in the mildly non-linear regime in the context of the effective field theory of large-scale structure (EFTofLSS). For neutrinos, whose typical free streaming wav
Externí odkaz:
http://arxiv.org/abs/1804.06849
Autor:
de Belsunce, Roger, Philcox, Oliver H E, Iršič, Vid, McDonald, Patrick, Guy, Julien, Palanque-Delabrouille, Nathalie
Publikováno v:
Monthly Notices of the Royal Astronomical Society; 9/30/2024, Vol. 533 Issue 3, p3756-3770, 15p
Autor:
De Belsunce, Roger
In this thesis, we study challenges arising in cosmological data analysis using data from the cosmic microwave background (CMB), remnant radiation from the Big Bang, and the Lyman-α forest, absorption features in spectra of distant quasars. A six-pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1ac93a0f4ed6c2b942ef88266451202
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