Neutral hydrogen lensing simulations in the hubble frontier fields

dc.contributor.authorBlecher, Tariq
dc.contributor.authorDeane, Roger
dc.contributor.authorObreschkow, Danail
dc.contributor.authorHeywood, Ian
dc.date.accessioned2025-02-21T07:34:57Z
dc.date.available2025-02-21T07:34:57Z
dc.date.issued2024-07
dc.descriptionDATA AVAILABILITY : There are no new data associated with this article.en_US
dc.description.abstractCold gas evolution ties the formation of dark matter haloes to the star formation history of the universe. A primary component of cold gas, neutral atomic hydrogen (HI), can be traced by its 21-cm emission line. However, the faintness of this emission typically limits individual detections to low redshifts ( z 0 . 2). To address this limitation, we investigate the potential of targeting gravitationally lensed systems. Building on our prior galaxy–galaxy simulations, we have developed a ray-tracing code to simulate lensed HI images for known galaxies situated behind the massive hubble frontier field galaxy clusters. Our findings reveal the existence of high HI mass, high HI magnification systems in these cluster-lensing scenarios. Through simulations of hundreds of sources, we have identified compelling targets within the redshift range z ≈0 . 7 −1 . 5. The most promising candidate from our simulations is the Great Arc at z = 0.725 in Abell 370, which should be detectable by MeerKAT in approximately 50 h. Importantly, the derived HI mass is predicted to be relatively insensitive to systematic uncertainties in the lensing model, and should be constrained within a factor of ∼2 . 5 for a 95 per cent confidence interval.en_US
dc.description.departmentPhysicsen_US
dc.description.librarianam2024en_US
dc.description.sdgNoneen_US
dc.description.sponsorshipThe South African Radio Astronomy Observatory, which is a facility of the National Research Foundation, an agency of the Department of Science and Technology; RPD’s research is funded by the South African Research Chairs Initiative of the DSI/NRF; an Australian Research Council Future Fellowship funded by the Australian Government; this lens modelling was partially funded by the HST Frontier Fields program.en_US
dc.description.urihttps://academic.oup.com/mnrasen_US
dc.identifier.citationBlecher, T., Deane, R., Obreschkow, D. et al. 2024, 'Neutral hydrogen lensing simulations in the hubble frontier fields', Monthly Notices of the Royal Astronomical Society, vol. 532, pp. 3236-3251. https://DOI.org/10.1093/mnras/stae1706.en_US
dc.identifier.issn0035-8711 (print)
dc.identifier.issn1365-2966 (online)
dc.identifier.other10.1093/mnras/stae1706
dc.identifier.urihttp://hdl.handle.net/2263/101111
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.rights© 2024 The Author(s). This is an Open Access article distributed under the terms of the Creative Commons Attribution License.en_US
dc.subjectGravitational lensing: strongen_US
dc.subjectGalaxies: evolutionen_US
dc.subjectGalaxies: high-redshiften_US
dc.subjectRadio lines: galaxiesen_US
dc.titleNeutral hydrogen lensing simulations in the hubble frontier fieldsen_US
dc.typeArticleen_US

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