Prospects for cosmic magnification measurements using H I intensity mapping

dc.contributor.authorWitzemann, Amadeus
dc.contributor.authorPourtsidou, Alkistis
dc.contributor.authorSantos, Mario G.
dc.date.accessioned2021-02-08T09:38:09Z
dc.date.available2021-02-08T09:38:09Z
dc.date.issued2020
dc.description.abstractWe 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.citationWitzemann, A. et al. (2020). Prospects for cosmic magnification measurements using H I intensity mapping. Monthly Notices of the Royal Astronomical Society, 496( 2), 1959–1966en_US
dc.identifier.issn1365-2966
dc.identifier.urihttps://doi.org/10.1093/mnras/staa1578
dc.identifier.urihttp://hdl.handle.net/10566/5853
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.subjectGravitational lensing: weaken_US
dc.subjectLarge-scale structure of Universeen_US
dc.subjectH I intensity mappingen_US
dc.subjectCosmic magnificationen_US
dc.subjectRadio galaxy surveysen_US
dc.titleProspects for cosmic magnification measurements using H I intensity mappingen_US
dc.typeArticleen_US

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