English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The study of the magnification bias produced on high-redshift sub-millimetregalaxies by foreground galaxies through the analysis of the cross-correlationfunction was recently demonstrated as an interesting independent alternative tothe weak-lensing shear as a cosmological probe. In the case of the proposedobservable, most of the cosmological constraints mainly depend on the largestangular separation measurements. Therefore, we aim to study and correct themain large-scale biases that affect foreground and background galaxy samples toproduce a robust estimation of the cross-correlation function. Then we analysethe corrected signal to derive updated cosmological constraintsWe measured thelarge-scale, bias-corrected cross-correlation functions using a backgroundsample of H-ATLAS galaxies with photometric redshifts > 1.2 and two differentforeground samples (GAMA galaxies with spectroscopic redshifts or SDSS galaxieswith photometric ones, both in the range 0.2 < z < 0.8). These measurements aremodelled using the traditional halo model description that depends on both halooccupation distribution and cosmological parameters. We then estimated theseparameters by performing a Markov chain Monte Carlo under multiple scenarios tostudy the performance of this observable and how to improve its results. Afterthe large-scale bias corrections, we obtain only minor improvements withrespect to the previous magnification bias results, mainly confirming theirconclusions: a lower bound on $\Omega_m > 0.22$ at $95\%$ C.L. and an upperbound $\sigma_8 < 0.97$ at $95\%$ C.L. (results from the $z_{spec}$ sample).However, by combining both foreground samples into a simplified tomographicanalysis, we were able to obtain interesting constraints on the$\Omega_m$-$\sigma_8$ plane as follows: $\Omega_m= 0.50_{- 0.20}^{+ 0.14}$ and$\sigma_8= 0.75_{- 0.10}^{+ 0.07}$ at 68\% CL.

Cosmological constraints with the sub-millimetre galaxies Magnification Bias after large scale bias corrections