Cosmic magnification on high-redshift submillimeter galaxies

TL;DR

This paper reviews how cosmic magnification using high-redshift submillimeter galaxies, enabled by Herschel data, offers a promising and underutilized method for cosmological studies, with recent results and future prospects discussed.

Contribution

It summarizes the principles, advantages, recent results, and future challenges of using cosmic magnification on high-redshift submillimeter galaxies for cosmology.

Findings

Cosmic magnification provides a complementary cosmological probe.

Herschel data has enhanced the potential of magnification analyses.

The method shows promise for future cosmological applications.

Abstract

Weak lensing magnification probes the correlation between galaxies and the underlying matter field in a similar fashion to galaxy-galaxy lensing shear. Although it has long been sidelined in favor of the latter on the grounds of a poorer performance in terms of statistical significance, the provision of a large sample of high-redshift submillimeter galaxies by the \emph{Herschel} observatory has transformed the landscape of cosmic magnification due to their optimal physical properties for magnification analyses. This review aims to summarize the core principles and unique advantages of cosmic magnification on high-redshift submillimeter galaxies and discuss recent results applied for cosmological inference. The outlook and challenges of this observable are also outlined, with a focus on the ample scope for exploration and its potential to emerge as a competitive independent cosmological probe.