Simulation of Systematics in Future Single-Dish HI Intensity Mapping Experiments

TL;DR

This paper presents a simulation pipeline to assess systematic errors in future HI intensity mapping experiments, focusing on 1/f noise and satellite emission impacts.

Contribution

It introduces a new simulation pipeline capable of modeling systematics at the TOD level for HI IM surveys, aiding in understanding their effects.

Findings

Systematic errors from 1/f noise can significantly affect HI signal recovery.

Satellite emission introduces measurable contamination in HI IM data.

The pipeline helps in designing mitigation strategies for future experiments.

Abstract

HI intensity mapping (IM) is an exciting new probe that could revolutionize the future of cosmology. However, the relative faintness of the HI signal when compared to foregrounds of astrophysical or terrestrial origin will make HI IM extremely challenging. The imprint of these foregrounds may result in systematic errors in the recovered cosmological signal. We discuss an IM simulation pipeline developed at Manchester that can introduce systematic errors at the TOD level in order to help assess their impact. We will present results for two potential sources of systematics for HI IM surveys: 1/f noise and the integrated emission from global navigation satellites.