Prospects for cosmic magnification measurements using H I intensity mapping
| dc.contributor.author | Witzemann, Amadeus | |
| dc.contributor.author | Pourtsidou, Alkistis | |
| dc.contributor.author | Santos, Mario G. | |
| dc.date.accessioned | 2021-02-08T09:38:09Z | |
| dc.date.available | 2021-02-08T09:38:09Z | |
| dc.date.issued | 2020 | |
| dc.description.abstract | We investigate the prospects of measuring the cosmic magnification effect by cross-correlating neutral hydrogen intensity mapping (H I IM) maps with background optical galaxies. We forecast the signal-to-noise ratio for H i IM data from SKA1-MID and HIRAX, combined with LSST photometric galaxy samples. We find that, thanks to their different resolutions, SKA1-MID and HIRAX are highly complementary in such an analysis. We predict that SKA1-MID can achieve a detection with a signal-to-noise ratio of ∼15 on a multipole range of ℓ ≲ 200, while HIRAX can reach a signal-to-noise ratio of ∼50 on 200 < ℓ < 2000. We conclude that measurements of the cosmic magnification signal will be possible on a wide redshift range with foreground H I intensity maps up to z ≲ 2, while optimal results are obtained when 0.6 ≲ z ≲ 1.3. | en_US |
| dc.identifier.citation | Witzemann, A. et al. (2020). Prospects for cosmic magnification measurements using H I intensity mapping. Monthly Notices of the Royal Astronomical Society, 496( 2), 1959–1966 | en_US |
| dc.identifier.issn | 1365-2966 | |
| dc.identifier.uri | https://doi.org/10.1093/mnras/staa1578 | |
| dc.identifier.uri | http://hdl.handle.net/10566/5853 | |
| dc.language.iso | en | en_US |
| dc.publisher | Oxford University Press | en_US |
| dc.subject | Gravitational lensing: weak | en_US |
| dc.subject | Large-scale structure of Universe | en_US |
| dc.subject | H I intensity mapping | en_US |
| dc.subject | Cosmic magnification | en_US |
| dc.subject | Radio galaxy surveys | en_US |
| dc.title | Prospects for cosmic magnification measurements using H I intensity mapping | en_US |
| dc.type | Article | en_US |