Full-sky bispectrum in redshift space for 21cm intensity maps

Ruth Durrer; Mona Jalilvand; Rahul Kothari; Roy Maartens; Francesco Montanari

doi:10.1088/1475-7516/2020/12/003

Full-sky bispectrum in redshift space for 21cm intensity maps

Ruth Durrer, Mona Jalilvand, Rahul Kothari, Roy Maartens, Francesco Montanari

Institute of Cosmology & Gravitation

Research output: Contribution to journal › Article › peer-review

76 Downloads (Pure)

Abstract

We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in the directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift bins, for which the lensing contribution is negligible. We demonstrate the importance of the contributions from redshift-space distortions which typically dominate the result. Taking into account the effects of telescope beams and foreground cleaning, we estimate the signal to noise and show that the bispectrum is detectable by both SKA in single-dish mode and HIRAX in interferometer mode, especially at the lower redshifts in their respective ranges.

Original language	English
Article number	003
Number of pages	18
Journal	Journal of Cosmology and Astroparticle Physics
Volume	12
DOIs	https://doi.org/10.1088/1475-7516/2020/12/003
Publication status	Published - 1 Dec 2020

Keywords

astro-ph.CO
RCUK
STFC
ST/N000668/1

Access to Document

10.1088/1475-7516/2020/12/003

Durrer_et_al_AAM
This Accepted Manuscript is available for reuse under a CC BY-NC-ND licence after the 12 month embargo period provided that all the terms of the licence are adhered to.
Accepted author manuscript (Post-print), 4.27 MBLicence: CC BY-NC-ND

Data availability statement for 'Full-sky bispectrum in redshift space for 21cm intensity maps'.
Durrer, R. (Creator), Jalilvand, M. (Creator), Kothari, R. (Creator), Maartens, R. (Creator) & Montanari, F. (Creator), IOP Publishing, 6 Aug 2020
Dataset

Cite this

@article{93adc838dff14cd58c0f6b2cb341c9e6,

title = "Full-sky bispectrum in redshift space for 21cm intensity maps",

abstract = "We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in the directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift bins, for which the lensing contribution is negligible. We demonstrate the importance of the contributions from redshift-space distortions which typically dominate the result. Taking into account the effects of telescope beams and foreground cleaning, we estimate the signal to noise and show that the bispectrum is detectable by both SKA in single-dish mode and HIRAX in interferometer mode, especially at the lower redshifts in their respective ranges. ",

keywords = "astro-ph.CO, RCUK, STFC, ST/N000668/1",

author = "Ruth Durrer and Mona Jalilvand and Rahul Kothari and Roy Maartens and Francesco Montanari",

note = "Version accepted by JCAP. 12 months embargo. This Accepted Manuscript is available for reuse under a CC BY-NC-ND licence after the 12 month embargo period provided that all the terms of the licence are adhered to.",

year = "2020",

month = dec,

day = "1",

doi = "10.1088/1475-7516/2020/12/003",

language = "English",

volume = "12",

journal = "Journal of Cosmology and Astroparticle Physics",

issn = "1475-7516",

publisher = "IOP Publishing",

}

TY - JOUR

T1 - Full-sky bispectrum in redshift space for 21cm intensity maps

AU - Durrer, Ruth

AU - Jalilvand, Mona

AU - Kothari, Rahul

AU - Maartens, Roy

AU - Montanari, Francesco

N1 - Version accepted by JCAP. 12 months embargo. This Accepted Manuscript is available for reuse under a CC BY-NC-ND licence after the 12 month embargo period provided that all the terms of the licence are adhered to.

PY - 2020/12/1

Y1 - 2020/12/1

N2 - We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in the directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift bins, for which the lensing contribution is negligible. We demonstrate the importance of the contributions from redshift-space distortions which typically dominate the result. Taking into account the effects of telescope beams and foreground cleaning, we estimate the signal to noise and show that the bispectrum is detectable by both SKA in single-dish mode and HIRAX in interferometer mode, especially at the lower redshifts in their respective ranges.

AB - We compute the tree-level bispectrum of 21cm intensity mapping after reionisation. We work in the directly observable angular and redshift space, focusing on equal-redshift correlations and thin redshift bins, for which the lensing contribution is negligible. We demonstrate the importance of the contributions from redshift-space distortions which typically dominate the result. Taking into account the effects of telescope beams and foreground cleaning, we estimate the signal to noise and show that the bispectrum is detectable by both SKA in single-dish mode and HIRAX in interferometer mode, especially at the lower redshifts in their respective ranges.

KW - astro-ph.CO

KW - RCUK

KW - STFC

KW - ST/N000668/1

U2 - 10.1088/1475-7516/2020/12/003

DO - 10.1088/1475-7516/2020/12/003

M3 - Article

SN - 1475-7516

VL - 12

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

M1 - 003

ER -

Full-sky bispectrum in redshift space for 21cm intensity maps

Abstract

Keywords

Access to Document

Fingerprint

Datasets

Data availability statement for 'Full-sky bispectrum in redshift space for 21cm intensity maps'.

Cite this