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

Author:

Chen Qingxiang12,Meyer Martin13,Popping Attila13,Staveley-Smith Lister13ORCID,Bryant Julia345,Delhaize Jacinta6ORCID,Holwerda B W7ORCID,Cluver M E89ORCID,Loveday J10ORCID,Lopez-Sanchez Angel R31112,Zwaan Martin13,Taylor E N8,Hopkins A M11,Wright Angus14ORCID,Driver Simon115ORCID,Brough S16ORCID

Affiliation:

1. International Centre for Radio Astronomy Research (ICRAR), The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia

2. ARC Centre of Excellence for All-Sky Astrophysics (CAASTRO), Australia

3. ARC Centre of Excellence for All-Sky Astrophysics in 3 Dimensions (ASTRO 3D), Australia

4. Australian Astronomical Optics, AAO-USydney, School of Physics, University of Sydney, Sydney, NSW 2006, Australia

5. Sydney Institute for Astronomy (SIfA), School of Physics, Faculty of Science, The University of Sydney, Sydney, NSW 2006, Australia

6. Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa

7. Department of Physics and Astronomy, University of Louisville, 102 Natural Science Building, Louisville, KY 40292, USA

8. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, John Street, Hawthorn 3122, Australia

9. Department of Physics and Astronomy, University of the Western Cape, Robert Sobukwe Drive, Bellville 7535, South Africa

10. Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH, UK

11. Australian Astronomical Optics, Macquarie University, 105 Delhi Road, North Ryde, NSW 2113, Australia

12. Department of Physics and Astronomy, Macquarie University, Sydney, NSW 2109, Australia

13. European Southern Observatory, Karl-Schwarzschildstrasse 2, D-85748 Garching bei München, Germany

14. German Center for Cosmological Lensing, Astronomiches Institut, Ruhr-Universität Bochum, Universitätsstr 150, D-44780 Bochum, Germany

15. School of Physics & Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK

16. School of Physics, University of New South Wales, Sydney, NSW 2052, Australia

Abstract

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 ${\rm{M_{\rm{{H}\,\small{I}}}}}=(1.67\pm 0.18)\times 10^{9}~{\rm{{\rm M}_{\odot }}}$. The corresponding cosmic density of neutral atomic hydrogen is ${\rm{\Omega _{\rm{{H}\,\small{I}}}}}=(0.38\pm 0.04)\times 10^{-3}$ at redshift of z = 0.051. These values are in good agreement with earlier results, implying there is no significant evolution of $\Omega _{\rm{{H}\,\small{I}}}$ at lower redshifts.

Funder

ASTRO

Associated Universities, Inc.

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 8 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3