Zobrazeno 1 - 10
of 243
pro vyhledávání: '"Guzzo Luigi"'
We develop a set of machine-learning based cosmological emulators, to obtain fast model predictions for the $C(\ell)$ angular power spectrum coefficients characterising tomographic observations of galaxy clustering and weak gravitational lensing from
Externí odkaz:
http://arxiv.org/abs/2206.14208
Lagrangian algorithms to simulate the evolution of cold dark matter (CDM) are invaluable tools to generate large suites of mock halo catalogues. In this paper, we first show that the main limitation of current semi-analytical schemes to simulate the
Externí odkaz:
http://arxiv.org/abs/2012.14446
We present a public code to generate random fields with an arbitrary probability distribution function (PDF) and an arbitrary correlation function. The algorithm is cosmology-independent, applicable to any stationary stochastic process over a three d
Externí odkaz:
http://arxiv.org/abs/2006.04653
Autor:
Montero-Dorta, Antonio D., Abramo, L. Raul, Granett, Benjamin R., de la Torre, Sylvain, Guzzo, Luigi
We use mock galaxy data from the VIMOS Public Extragalactic Redshift Survey (VIPERS) to test the performance of the Multi-Tracer Optimal Estimator (MTOE) of Abramo et al. as a tool to measure the monopoles of the power spectra of multiple tracers of
Externí odkaz:
http://arxiv.org/abs/1909.00010
Autor:
Ellis, Richard, Dawson, Kyle, Bland-Hawthorn, Joss, Bacon, Roland, Bolton, Adam, Bremer, Malcolm, Brinchmann, Jarle, Bundy, Kevin, Conroy, Charlie, Delabre, Bernard, Dey, Arjun, Drlica-Wagner, Alex, Greene, Jenny, Guzzo, Luigi, Johnson, Jennifer, Leauthaud, Alexie, Lee, Khee-Gan, Pasquini, Luca, Pentericci, Laura, Richard, Johan, Rix, Hans-Walter, Rockosi, Connie, Schlegel, David, Slosar, Anže, Strauss, Michael, Takada, Masahiro, Tolstoy, Eline, Watson, Darach
We recommend a conceptual design study for a spectroscopic facility in the southern hemisphere comprising a large diameter telescope, fiber system, and spectrographs collectively optimized for massively-multiplexed spectroscopy. As a baseline, we pro
Externí odkaz:
http://arxiv.org/abs/1907.06797
Publikováno v:
JCAP12(2019)040
We test a theoretical description of the void size distribution function against direct estimates from halo catalogues of the DEMNUni suite of large cosmological simulations. Besides standard $\Lambda$CDM, we consider deviations of the dark energy eq
Externí odkaz:
http://arxiv.org/abs/1906.00409
Autor:
Granett, Benjamin R., Favole, Ginevra, Montero-Dorta, Antonio D., Branchini, Enzo, Guzzo, Luigi, de la Torre, Sylvain
Publikováno v:
MNRAS Volume 489, Issue 1, October 2019, Pages 653-662
We test the history of structure formation from redshift 1 to today by matching galaxies from VIPERS and SDSS with dark matter haloes in the MultiDark SMDPL N-body simulation. We first show that the standard subhalo abundance matching (SHAM) recipe i
Externí odkaz:
http://arxiv.org/abs/1905.10375
Autor:
Wang, Yun, Bean, Rachel, Behroozi, Peter, Chuang, Chia-Hsun, Dell'antonio, Ian, Dickinson, Mark, Dore, Olivier, Eisenstein, Daniel, Foley, Ryan, Glazebrook, Karl, Guzzo, Luigi, Hirata, Christopher, Ho, Shirley, Hudson, Michael, Jain, Bhuvnesh, Natarajan, Priyamvada, Newman, Jeff, Orsi, Alvaro, Padmanabhan, Nikhil, Peacock, John, Percival, Will, Rhodes, Jason, Rozo, Eduardo, Samushia, Lado, Scolnic, Dan, Seo, Hee-Jong, Spergel, David, Strauss, Michael, Wechsler, Risa, Weinberg, David
The nature of dark energy remains a profound mystery 20 years after the discovery of cosmic acceleration. A very high number density galaxy redshift survey over a wide area (HD GRS Wide) spanning the redshift range of 0.5
Externí odkaz:
http://arxiv.org/abs/1903.06034
We estimate the velocity field in a large set of $N$-body simulations including massive neutrino particles, and measure the auto-power spectrum of the velocity divergence field as well as the cross-power spectrum between the cold dark matter density
Externí odkaz:
http://arxiv.org/abs/1809.09338
Publikováno v:
Nature Astronomy, 2, 967 (2018)
The recent discovery of gravitational waves marks the culmination of a sequence of successful tests of the general theory of relativity (GR) since its formulation in 1915. Yet these tests remain confined to the scale of stellar systems or the strong
Externí odkaz:
http://arxiv.org/abs/1809.09019