Synergies between intensity maps of hydrogen lines
| dc.contributor.author | Fonseca, Jose | |
| dc.contributor.author | Maartens, Roy | |
| dc.contributor.author | Santos, Mario G. | |
| dc.date.accessioned | 2018-09-04T11:48:24Z | |
| dc.date.available | 2018-09-04T11:48:24Z | |
| dc.date.issued | 2018 | |
| dc.description.abstract | We study synergies between Hi 21cm and Hα intensity map observations, focusing on SKA1- like and SPHEREx-like surveys. We forecast how well such a combination can measure features in the angular power spectrum on the largest scales, that arise from primordial non- Gaussianity and from general relativistic effects. For the first time we consider Doppler, Sachs-Wolfe and integrated SW effects separately. We confirm that the single-tracer surveys on their own cannot detect general relativistic effects and can constrain the non-Gaussianity parameter fNL only slightly better than Planck. Using the multi-tracer technique, constraints on fNL can be pushed down to ~ 1. Amongst the general relativistic effects, the Doppler term is detectable with the multi-tracer. The Sachs-Wolfe terms and the integrated SW effect are still not detectable. | en_US |
| dc.description.accreditation | ISI | |
| dc.identifier.citation | Fonseca, J. et al. (2018). Synergies between intensity maps of hydrogen lines. Monthly Notices of the Royal Astronomical Society, 479: 3490 | en_US |
| dc.identifier.issn | 0035-8711 | |
| dc.identifier.uri | http://dx.doi.org/10.1093/mnras/sty1702 | |
| dc.identifier.uri | http://hdl.handle.net/10566/4004 | |
| dc.language.iso | en | en_US |
| dc.privacy.showsubmitter | FALSE | |
| dc.publisher | Oxford University Press | en_US |
| dc.rights | This is the pre-print version of the article published online at: http://dx.doi.org/10.1093/mnras/sty1702 | |
| dc.status.ispeerreviewed | TRUE | |
| dc.subject | Cosmology | en_US |
| dc.subject | Large-scale structure of the Universe | en_US |
| dc.subject | Cosmological parameters | en_US |
| dc.subject | Miscellaneous. | en_US |
| dc.title | Synergies between intensity maps of hydrogen lines | en_US |
| dc.type | Article | en_US |