Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Ajani, Virginia"'
Publikováno v:
A&A 672, L10 (2023)
We present a first application to photometric galaxy clustering and weak lensing of wavelet based multi-scale higher order summary statistics: starlet peak counts and starlet $\ell_1$-norm. Peak counts are the local maxima in the map and the $\ell_1$
Externí odkaz:
http://arxiv.org/abs/2211.10519
Autor:
Zürcher, Dominik, Fluri, Janis, Ajani, Virginia, Fischbacher, Silvan, Refregier, Alexandre, Kacprzak, Tomasz
The next generation of weak lensing surveys will measure the matter distribution of the local Universe with unprecedented precision, allowing the resolution of non-Gaussian features of the convergence field. This encourages the use of higher-order ma
Externí odkaz:
http://arxiv.org/abs/2206.01450
Autor:
Ayçoberry, Emma, Ajani, Virginia, Guinot, Axel, Kilbinger, Martin, Pettorino, Valeria, Farrens, Samuel, Starck, Jean-Luc, Gavazzi, Raphaël, Hudson, Michael J.
Publikováno v:
A&A 671, A17 (2023)
UNIONS is an ongoing deep photometric multi-band survey of the Northern sky. As part of UNIONS, CFIS provides r-band data which we use to study weak-lensing peak counts for cosmological inference. We assess systematic effects for weak-lensing peak co
Externí odkaz:
http://arxiv.org/abs/2204.06280
Publikováno v:
A&A 645, L11 (2021)
We present a new summary statistic for weak lensing observables, higher than second order, suitable for extracting non-Gaussian cosmological information and inferring cosmological parameters. We name this statistic the 'starlet $\ell_1$-norm' as it i
Externí odkaz:
http://arxiv.org/abs/2101.01542
Publikováno v:
Phys. Rev. D 102, 103531, (2020)
Massive neutrinos influence the background evolution of the Universe as well as the growth of structure. Being able to model this effect and constrain the sum of their masses is one of the key challenges in modern cosmology. Weak-lensing cosmological
Externí odkaz:
http://arxiv.org/abs/2001.10993
Akademický článek
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Akademický článek
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Autor:
Ajani, Virginia
Publikováno v:
Other [cond-mat.other]. Université Paris Cité, 2021. English. ⟨NNT : 2021UNIP7071⟩
Weak gravitational lensing by the large-scale structure is the effect of bending of light emitted by backgroundgalaxies due to the presence of foreground matter. It represents a powerful tool for estimating cosmologicalparameters, as it is sensitive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::c212450b419d74f5e00ac1469371840f
https://theses.hal.science/tel-03644314/file/Virginia_Ajani_va2.pdf
https://theses.hal.science/tel-03644314/file/Virginia_Ajani_va2.pdf
Massive neutrinos influence the background evolution of the Universe as well as the growth of structure. Being able to model this effect and constrain the sum of their masses is one of the key challenges in modern cosmology. Weak gravitational lensin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::811b93380f4c3f374498162fc4723fc0
https://hal.archives-ouvertes.fr/hal-02484006
https://hal.archives-ouvertes.fr/hal-02484006