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

We investigate the prospects of measuring the cosmic magnification effect bycross-correlating neutral hydrogen intensity mapping (HI IM) maps withbackground optical galaxies. We forecast the signal-to-noise ratio for HI IMdata from SKA1-MID and HIRAX, combined with LSST photometric galaxy samples. Wefind that, thanks to their different resolutions, SKA1-MID and HIRAX are highlycomplementary in such an analysis. We predict that SKA1-MID can achieve adetection with a signal-to-noise ratio of $\sim 15$ on a multipole range of$\ell \lesssim 200$, while HIRAX can reach a signal-to-noise ratio of $\sim 50$on $200 < \ell < 2000$. We conclude that measurements of the cosmicmagnification signal will be possible on a wide redshift range with foregroundHI intensity maps up to $z \lesssim 2$, while optimal results are obtained when$0.6 \lesssim z \lesssim 1.3$. Finally, we perform a signal to noise analysisthat shows how these measurements can constrain the HI parameters across a wideredshift range.

Prospects for cosmic magnification measurements using HI intensity mapping