Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Lacasa, Fabien"'
To date, the most precise measurement of the observer's peculiar velocity comes from the dipole in the Cosmic Microwave Background (CMB). This velocity also generates a dipole in the source number counts, whose amplitude is governed not only by the o
Externí odkaz:
http://arxiv.org/abs/2402.18438
Autor:
Lacasa, Fabien, Aubert, Marie, Baratta, Philippe, Carron, Julien, Gorce, Adélie, Beauchamps, Sylvain Gouyou, Legrand, Louis, Dizgah, Azadeh Moradinezhad, Tutusaus, Isaac
Publikováno v:
A&A 671, A115 (2023)
Super-sample covariance (SSC) is an important effect for cosmological analyses that use the deep structure of the cosmic web; it may, however, be nontrivial to include it practically in a pipeline. We solve this difficulty by presenting a formula for
Externí odkaz:
http://arxiv.org/abs/2209.14421
The velocity of the Sun with respect to the cosmic microwave background (CMB) can be extracted from the CMB dipole, provided its intrinsic dipole is assumed to be small in comparison. This interpretation is consistent, within fairly large error bars,
Externí odkaz:
http://arxiv.org/abs/2209.12812
Autor:
Ravenni, Andrea, Rizzato, Matteo, Radinović, Slađana, Liguori, Michele, Lacasa, Fabien, Sellentin, Elena
Non-Gaussian (NG) statistics of the thermal Sunyaev-Zeldovich (tSZ) effect carry significant information which is not contained in the power spectrum. Here, we perform a joint Fisher analysis of the tSZ power spectrum and bispectrum to verify how muc
Externí odkaz:
http://arxiv.org/abs/2008.12947
Autor:
Lacasa, Fabien
Publikováno v:
A&A 661, A70 (2022)
Interest rises to exploit the full shape information of the galaxy power spectrum, as well as pushing analyses to smaller non-linear scales. Here I use the halo model to quantify the information content in the tomographic angular power spectrum of ga
Externí odkaz:
http://arxiv.org/abs/1912.06906
Future large-scale structure surveys will measure three-point statistics with high statistical significance. This will offer significant improvements on our understanding of gravity, provided we can model these statistics accurately. We assess the pe
Externí odkaz:
http://arxiv.org/abs/1909.02504
Autor:
Lacasa, Fabien
Publikováno v:
A&A 634, A74 (2020)
As galaxy surveys become more precise and push to smaller scales, the need for accurate covariances beyond the classical Gaussian formula becomes more acute. Here, I investigate the analytical implementation and impact of non-Gaussian covariance term
Externí odkaz:
http://arxiv.org/abs/1909.00791
Autor:
Jalilvand, Mona, Majerotto, Elisabetta, Bonvin, Camille, Lacasa, Fabien, Kunz, Martin, Naidoo, Warren, Moodley, Kavilan
Publikováno v:
Phys. Rev. Lett. 124, 031101 (2020)
We introduce the Galaxy Intensity Mapping cross-COrrelation estimator (GIMCO), which is a new tomographic estimator for the gravitational lensing potential, based on a combination of intensity mapping (IM) and galaxy number counts. The estimator can
Externí odkaz:
http://arxiv.org/abs/1907.00071
Publikováno v:
MNRAS 490 (2019) 4688-4714
We address key points for an efficient implementation of likelihood codes for modern weak lensing large-scale structure surveys. Specifically, we focus on the joint weak lensing convergence power spectrum-bispectrum probe and we tackle the numerical
Externí odkaz:
http://arxiv.org/abs/1812.07437
Publikováno v:
A&A 630, A149 (2019)
Magnetized plasmas within halos of galaxies leave their footprint on the polarized anisotropies of the cosmic microwave background. The two dominant effects for astrophysical halos are Faraday rotation generating rotation of the plane of linear polar
Externí odkaz:
http://arxiv.org/abs/1810.09221