Constraining the relation between neutral hydrogen and its environment using radio interferometry

Manasvee Saraf

doi:10.26182/gw6m-dv04

Constraining the relation between neutral hydrogen and its environment using radio interferometry

Manasvee Saraf

School of Physics, Mathematics and Computing

Research output: Thesis › Doctoral Thesis

219 Downloads (Pure)

Abstract

This thesis explores the relationship between neutral atomic hydrogen gas (HI) and its environment using radio interferometry. It examines the scatter of the HI-halo mass relation of central galaxies in the xGASS survey, identifying a strong correlation with stellar specific angular momentum and providing crucial constraints for simulations. The discovery of HI absorption associated with Norma'sbrightest cluster galaxy (BCG) is also discussed, suggesting the BCG's recent arrival into the clustercore. Finally, 25 HI detections towards the Norma cluster are presented, alongside the optimisation of the automated WALLABY data-processing and HI source-finding pipelines near bright continuum sources.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Cortese, Luca, Supervisor Wong, Ivy, Supervisor
Award date	10 Feb 2025
DOIs	https://doi.org/10.26182/gw6m-dv04
Publication status	Unpublished - 2025

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10.26182/gw6m-dv04

THESIS - DOCTOR OF PHILOSOPHY - SARAF Manasvee - 2024_
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xGASS: the scatter of the H i-halo mass relation of central galaxies
Saraf, M., Cortese, L., Wong, O. I., Catinella, B., Janowiecki, S. & Hardwick, J. A., May 2024, In: Monthly Notices of the Royal Astronomical Society. 530, 2, p. 2420-2432 13 p.
Research output: Contribution to journal › Article › peer-review

Open Access
6 Link opens in a new tab Citations (Scopus)
H I absorption associated with Norma's brightest cluster galaxy
Saraf, M., Wong, I., Cortese, L. & Koribalski, B., 1 Mar 2023, In: Monthly Notices of the Royal Astronomical Society. 519, 3, p. 4128–4141 14 p.
Research output: Contribution to journal › Article › peer-review

Open Access
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5 Link opens in a new tab Citations (Scopus)

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Cite this

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title = "Constraining the relation between neutral hydrogen and its environment using radio interferometry",

abstract = "This thesis explores the relationship between neutral atomic hydrogen gas (HI) and its environment using radio interferometry. It examines the scatter of the HI-halo mass relation of central galaxies in the xGASS survey, identifying a strong correlation with stellar specific angular momentum and providing crucial constraints for simulations. The discovery of HI absorption associated with Norma'sbrightest cluster galaxy (BCG) is also discussed, suggesting the BCG's recent arrival into the clustercore. Finally, 25 HI detections towards the Norma cluster are presented, alongside the optimisation of the automated WALLABY data-processing and HI source-finding pipelines near bright continuum sources.",

keywords = "radio astronomy, galaxy evolution, neutral atomic hydrogen, galaxy clusters, dark matter haloes, HI surveys, baryon cycle, data processing and source finding",

author = "Manasvee Saraf",

year = "2025",

doi = "10.26182/gw6m-dv04",

language = "English",

school = "The University of Western Australia",

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AU - Saraf, Manasvee

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Y1 - 2025

N2 - This thesis explores the relationship between neutral atomic hydrogen gas (HI) and its environment using radio interferometry. It examines the scatter of the HI-halo mass relation of central galaxies in the xGASS survey, identifying a strong correlation with stellar specific angular momentum and providing crucial constraints for simulations. The discovery of HI absorption associated with Norma'sbrightest cluster galaxy (BCG) is also discussed, suggesting the BCG's recent arrival into the clustercore. Finally, 25 HI detections towards the Norma cluster are presented, alongside the optimisation of the automated WALLABY data-processing and HI source-finding pipelines near bright continuum sources.

AB - This thesis explores the relationship between neutral atomic hydrogen gas (HI) and its environment using radio interferometry. It examines the scatter of the HI-halo mass relation of central galaxies in the xGASS survey, identifying a strong correlation with stellar specific angular momentum and providing crucial constraints for simulations. The discovery of HI absorption associated with Norma'sbrightest cluster galaxy (BCG) is also discussed, suggesting the BCG's recent arrival into the clustercore. Finally, 25 HI detections towards the Norma cluster are presented, alongside the optimisation of the automated WALLABY data-processing and HI source-finding pipelines near bright continuum sources.

KW - radio astronomy

KW - galaxy evolution

KW - neutral atomic hydrogen

KW - galaxy clusters

KW - dark matter haloes

KW - HI surveys

KW - baryon cycle

KW - data processing and source finding

U2 - 10.26182/gw6m-dv04

DO - 10.26182/gw6m-dv04

M3 - Doctoral Thesis

ER -

Constraining the relation between neutral hydrogen and its environment using radio interferometry

Abstract

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Research output

xGASS: the scatter of the H i-halo mass relation of central galaxies

H I absorption associated with Norma's brightest cluster galaxy

Cite this