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• W3204168839 endingPage "A99" @default.
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• W3204168839 abstract "As in Gonzalez-Nuevo et al. 2017 and Bonavera et al. 2019, the high-z sub-millimetre galaxies can be used as background sample for gravitational lensing studies thanks to their magnification bias. In particular, as in Bonavera et al. 2020 the magnification bias can be exploited in order to constrain the free parameters of a Halo Occupation Distribution (HOD) model and some of the main cosmological parameters. In this work the magnification bias has been evaluated as cosmological tool in a tomographic set up. The cross-correlation function (CCF) data have been used to jointly constrain the astrophysical parameters $M_{min}$, $M_{1}$ and $alpha$ in each one of the selected redshift bins and the $Omega_{M}$, $sigma_{8}$, and $H_0$ cosmological ones ($Lambda$CDM). Moreover, we explore the possible time evolution of the dark energy density introducing also the $omega_0, omega_a$ parameters in the joint analysis ($omega_0$CDM and $omega_0omega_a$CDM). The CCF has been measured between a foreground spectroscopic sample of GAMA galaxies that has been divided into four redshift bins (0.1-0.2, 0.2-0.3, 0.3-0.5 and 0.5-0.8) and a sample of H-ATLAS galaxies with photometric redshifts >1.2. The CCF is modelled using a description that depends on HOD and cosmological parameters that are estimated with MCMC in different cases. For the $Lambda$CDM model, the analysis yields a maximum posterior value at 0.26 with $[0.17,0.41]$ 68% C.I. for $Omega_M$ and at 0.87 with $[0.75,1]$ 68% C.I. for $sigma_8$. With our current results $H_0$ is not yet constrained. With the $omega_0$CDM model, the constraints on $Omega_M$ and $sigma_8$ are similar, but we found a maximum posterior value for $omega_0$ at -1 with $[-1.56, -0.47]$ 68% C.I. In the $omega_0omega_a$CDM model, the results are -1.09 with $[-1.72, -0.66]$ 68% C.I. for $omega_0$ and -0.19 with $[-1.88, 1.48]$ 68% C.I. for $omega_a$." @default.
• W3204168839 created "2021-10-11" @default.
• W3204168839 creator A5010274077 @default.
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• W3204168839 date "2021-12-01" @default.
• W3204168839 modified "2023-10-01" @default.
• W3204168839 title "Cosmology with the submillimetre galaxies magnification bias" @default.
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• W3204168839 doi "https://doi.org/10.1051/0004-6361/202141521" @default.
• W3204168839 hasPublicationYear "2021" @default.
• W3204168839 type Work @default.

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