Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data

Qingxiang Chen; Martin Meyer; Attila Popping; Lister Staveley-Smith; Julia Bryant; Jacinta Delhaize; B W Holwerda; M E Cluver; J Loveday; Angel R Lopez-Sanchez; Martin Zwaan; E N Taylor; A M Hopkins; Angus Wright; Simon Driver; S Brough

doi:10.1093/mnras/stab2810

Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data

Qingxiang Chen, Martin Meyer, Attila Popping, Lister Staveley-Smith, Julia Bryant, Jacinta Delhaize, B W Holwerda, M E Cluver, J Loveday, Angel R Lopez-Sanchez, Martin Zwaan, E N Taylor, A M Hopkins, Angus Wright, Simon Driver, S Brough

School of Physics and Astronomy

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

Abstract

We use the 21-cm emission-line data from the Deep Investigation of Neutral Gas Origin-Very Large Array (DINGO-VLA) project to study the atomic hydrogen gas H I of the Universe at redshifts z< 0.1. Results are obtained using a stacking analysis, combining the H I signals from 3622 galaxies extracted from 267 VLA pointings in the G09 field of the Galaxy and Mass Assembly Survey (GAMA). Rather than using a traditional one-dimensional spectral stacking method, a three-dimensional cubelet stacking method is used to enable deconvolution and the accurate recovery of average galaxy fluxes from this high-resolution interferometric data set. By probing down to galactic scales, this experiment also overcomes confusion corrections that have been necessary to include in previous single-dish studies. After stacking and deconvolution, we obtain a 30σ H I mass measurement from the stacked spectrum, indicating an average H I mass of M_HI=(1.67±0.18)×10⁹ M_⊙MHI=(1.67±0.18)×10⁹ M_⊙⁠. The corresponding cosmic density of neutral atomic hydrogen is Ω_HI=(0.38±0.04)×10⁻³ at redshift of z = 0.051. These values are in good agreement with earlier results, implying there is no significant evolution of Ω_HI at lower redshifts.

Original language	English
Pages (from-to)	2758-2770
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	508
Issue number	2
Early online date	2 Oct 2021
DOIs	https://doi.org/10.1093/mnras/stab2810
Publication status	Published - Dec 2021

Keywords

Galaxies: star formation
Radio lines: galaxies
ISM: atoms

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10.1093/mnras/stab2810

Chen_2021_MNRAS_Measuring-cosmic-density_VoR
Copyright © 2021 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at https://doi.org/10.1093/mnras/stab2810.
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Chen, Q., Meyer, M., Popping, A., Staveley-Smith, L., Bryant, J., Delhaize, J., Holwerda, B. W., Cluver, M. E., Loveday, J., Lopez-Sanchez, A. R., Zwaan, M., Taylor, E. N., Hopkins, A. M., Wright, A., Driver, S., & Brough, S. (2021). Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data. Monthly Notices of the Royal Astronomical Society, 508(2), 2758-2770. https://doi.org/10.1093/mnras/stab2810

@article{06f8b02c05a04d7c9f7f48215b1bbbd8,

title = "Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data",

abstract = "We use the 21-cm emission-line data from the Deep Investigation of Neutral Gas Origin-Very Large Array (DINGO-VLA) project to study the atomic hydrogen gas H I of the Universe at redshifts z< 0.1. Results are obtained using a stacking analysis, combining the H I signals from 3622 galaxies extracted from 267 VLA pointings in the G09 field of the Galaxy and Mass Assembly Survey (GAMA). Rather than using a traditional one-dimensional spectral stacking method, a three-dimensional cubelet stacking method is used to enable deconvolution and the accurate recovery of average galaxy fluxes from this high-resolution interferometric data set. By probing down to galactic scales, this experiment also overcomes confusion corrections that have been necessary to include in previous single-dish studies. After stacking and deconvolution, we obtain a 30σ H I mass measurement from the stacked spectrum, indicating an average H I mass of MHI=(1.67±0.18)×109 M⊙MHI=(1.67±0.18)×109 M⊙⁠. The corresponding cosmic density of neutral atomic hydrogen is ΩHI=(0.38±0.04)×10−3 at redshift of z = 0.051. These values are in good agreement with earlier results, implying there is no significant evolution of ΩHI at lower redshifts.",

keywords = "Galaxies: star formation, Radio lines: galaxies, ISM: atoms",

author = "Qingxiang Chen and Martin Meyer and Attila Popping and Lister Staveley-Smith and Julia Bryant and Jacinta Delhaize and Holwerda, {B W} and Cluver, {M E} and J Loveday and Lopez-Sanchez, {Angel R} and Martin Zwaan and Taylor, {E N} and Hopkins, {A M} and Angus Wright and Simon Driver and S Brough",

note = "Parts of this research were supported by the Australian Research Council Centres of Excellence for All-Sky Astrophysics in 3 Dimensions (ASTRO 3D) and All-Sky Astrophysics (CAASTRO), through project numbers CE170100013 and CE110001020, respectively.",

year = "2021",

month = dec,

doi = "10.1093/mnras/stab2810",

language = "English",

volume = "508",

pages = "2758--2770",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "2",

}

Chen, Q, Meyer, M, Popping, A, Staveley-Smith, L, Bryant, J, Delhaize, J, Holwerda, BW, Cluver, ME, Loveday, J, Lopez-Sanchez, AR, Zwaan, M, Taylor, EN, Hopkins, AM, Wright, A, Driver, S & Brough, S 2021, 'Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data', Monthly Notices of the Royal Astronomical Society, vol. 508, no. 2, pp. 2758-2770. https://doi.org/10.1093/mnras/stab2810

TY - JOUR

T1 - Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data

AU - Chen, Qingxiang

AU - Meyer, Martin

AU - Popping, Attila

AU - Staveley-Smith, Lister

AU - Bryant, Julia

AU - Delhaize, Jacinta

AU - Holwerda, B W

AU - Cluver, M E

AU - Loveday, J

AU - Lopez-Sanchez, Angel R

AU - Zwaan, Martin

AU - Taylor, E N

AU - Hopkins, A M

AU - Wright, Angus

AU - Driver, Simon

AU - Brough, S

N1 - Parts of this research were supported by the Australian Research Council Centres of Excellence for All-Sky Astrophysics in 3 Dimensions (ASTRO 3D) and All-Sky Astrophysics (CAASTRO), through project numbers CE170100013 and CE110001020, respectively.

PY - 2021/12

Y1 - 2021/12

N2 - We use the 21-cm emission-line data from the Deep Investigation of Neutral Gas Origin-Very Large Array (DINGO-VLA) project to study the atomic hydrogen gas H I of the Universe at redshifts z< 0.1. Results are obtained using a stacking analysis, combining the H I signals from 3622 galaxies extracted from 267 VLA pointings in the G09 field of the Galaxy and Mass Assembly Survey (GAMA). Rather than using a traditional one-dimensional spectral stacking method, a three-dimensional cubelet stacking method is used to enable deconvolution and the accurate recovery of average galaxy fluxes from this high-resolution interferometric data set. By probing down to galactic scales, this experiment also overcomes confusion corrections that have been necessary to include in previous single-dish studies. After stacking and deconvolution, we obtain a 30σ H I mass measurement from the stacked spectrum, indicating an average H I mass of MHI=(1.67±0.18)×109 M⊙MHI=(1.67±0.18)×109 M⊙⁠. The corresponding cosmic density of neutral atomic hydrogen is ΩHI=(0.38±0.04)×10−3 at redshift of z = 0.051. These values are in good agreement with earlier results, implying there is no significant evolution of ΩHI at lower redshifts.

AB - We use the 21-cm emission-line data from the Deep Investigation of Neutral Gas Origin-Very Large Array (DINGO-VLA) project to study the atomic hydrogen gas H I of the Universe at redshifts z< 0.1. Results are obtained using a stacking analysis, combining the H I signals from 3622 galaxies extracted from 267 VLA pointings in the G09 field of the Galaxy and Mass Assembly Survey (GAMA). Rather than using a traditional one-dimensional spectral stacking method, a three-dimensional cubelet stacking method is used to enable deconvolution and the accurate recovery of average galaxy fluxes from this high-resolution interferometric data set. By probing down to galactic scales, this experiment also overcomes confusion corrections that have been necessary to include in previous single-dish studies. After stacking and deconvolution, we obtain a 30σ H I mass measurement from the stacked spectrum, indicating an average H I mass of MHI=(1.67±0.18)×109 M⊙MHI=(1.67±0.18)×109 M⊙⁠. The corresponding cosmic density of neutral atomic hydrogen is ΩHI=(0.38±0.04)×10−3 at redshift of z = 0.051. These values are in good agreement with earlier results, implying there is no significant evolution of ΩHI at lower redshifts.

KW - Galaxies: star formation

KW - Radio lines: galaxies

KW - ISM: atoms

U2 - 10.1093/mnras/stab2810

DO - 10.1093/mnras/stab2810

M3 - Article

SN - 0035-8711

VL - 508

SP - 2758

EP - 2770

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data

Abstract

Keywords

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