{"id":{"repo_id":"anu","oai_identifier":"oai:openresearch-repository.anu.edu.au:1885/136829"},"canonical_url":"https://search.dev.ndltd.org/etd/anu/oai:openresearch-repository.anu.edu.au:1885/136829","repository":{"repo_id":"anu","name":"Australian National University","base_url":"https://openresearch-repository.anu.edu.au/server/oai/request"},"display":{"title":"Distribution of matter in clusters of galaxies","abstract":"We present observations of the Sunyaev-Zel'dovich effect in 5 clusters of galaxies with a Fourier synthesis telescope - the Australia Telescope. A synthesis telescope has the advantage of simultaneously imaging the discrete radio sources and the Sunyaev-Zel'dovich effect. Observations were made at 8.8 GHz and in an ultra-compact 122.4m array configuration. Extended emission either due to radio halo sources or a blend of weak radio sources below the detection threshold, limited our ability to detect the SZ effect. However, upper limits to the SZ effect obtained for the cluster MS2137-23 was useful in constraining the cluster gas temperature when combined with the X-ray measurements and gravitational lensing constraints. The advantages of a multi-wavelength analysis of cluster mass density distributions and the properties of the intra-cluster medium were demonstrated through the examples of MS2137-23 and Abell 2218. Both clusters possess a giant arc that constrains the cluster central mass. In the case of Abell 2218 where there is a large amount of good data available in various wave-bands, we combined gravitational lensing constraints, optical photometry, measurements of the Sunyaev-Zel'dovich effect, X-ray surface brightness and temperature to constrain the cluster potential. H₀ and test the usual assumptions of mass-follows- light and hydrostatic equilibrium.","abstract_html":"We present observations of the Sunyaev-Zel'dovich effect in 5 clusters of galaxies with a Fourier synthesis telescope - the Australia Telescope. A synthesis telescope has the advantage of simultaneously imaging the discrete radio sources and the Sunyaev-Zel'dovich effect. Observations were made at 8.8 GHz and in an ultra-compact 122.4m array configuration. Extended emission either due to radio halo sources or a blend of weak radio sources below the detection threshold, limited our ability to detect the SZ effect. However, upper limits to the SZ effect obtained for the cluster MS2137-23 was useful in constraining the cluster gas temperature when combined with the X-ray measurements and gravitational lensing constraints. The advantages of a multi-wavelength analysis of cluster mass density distributions and the properties of the intra-cluster medium were demonstrated through the examples of MS2137-23 and Abell 2218. Both clusters possess a giant arc that constrains the cluster central mass. In the case of Abell 2218 where there is a large amount of good data available in various wave-bands, we combined gravitational lensing constraints, optical photometry, measurements of the Sunyaev-Zel'dovich effect, X-ray surface brightness and temperature to constrain the cluster potential. H₀ and test the usual assumptions of mass-follows- light and hydrostatic equilibrium.","abstract_has_math":false,"creators":["Liang, Haida"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1995,"date_issued":"1995","date_published":"1995","updated_at":"2026-07-24T00:55:04Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["b1945349"],"render_values":[{"text":"b1945349","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/1885/136829","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Liang, Haida"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2017-12-05T03:26:16Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2017-12-05T03:26:16Z"]},{"key":"dc:date.issued","label":"Date","values":["1995"]},{"key":"dc:type","label":"Dc Type","values":["Thesis (PhD)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["b1945349"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1885/136829"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["We present observations of the Sunyaev-Zel'dovich effect in 5 clusters of galaxies with a Fourier synthesis telescope - the Australia Telescope. A synthesis telescope has the advantage of simultaneously imaging the discrete radio sources and the Sunyaev-Zel'dovich effect. Observations were made at 8.8 GHz and in an ultra-compact 122.4m array configuration. Extended emission either due to radio halo sources or a blend of weak radio sources below the detection threshold, limited our ability to detect the SZ effect. However, upper limits to the SZ effect obtained for the cluster MS2137-23 was useful in constraining the cluster gas temperature when combined with the X-ray measurements and gravitational lensing constraints. The advantages of a multi-wavelength analysis of cluster mass density distributions and the properties of the intra-cluster medium were demonstrated through the examples of MS2137-23 and Abell 2218. Both clusters possess a giant arc that constrains the cluster central mass. In the case of Abell 2218 where there is a large amount of good data available in various wave-bands, we combined gravitational lensing constraints, optical photometry, measurements of the Sunyaev-Zel'dovich effect, X-ray surface brightness and temperature to constrain the cluster potential. H₀ and test the usual assumptions of mass-follows- light and hydrostatic equilibrium."]},{"key":"dc:title","label":"Title","values":["Distribution of matter in clusters of galaxies"]}]}],"canonical_facts":{"dc:creator":["Liang, Haida"],"dc:date.accessioned":["2017-12-05T03:26:16Z"],"dc:date.available":["2017-12-05T03:26:16Z"],"dc:date.issued":["1995"],"dc:description.abstract":["We present observations of the Sunyaev-Zel'dovich effect in 5 clusters of galaxies with a Fourier synthesis telescope - the Australia Telescope. A synthesis telescope has the advantage of simultaneously imaging the discrete radio sources and the Sunyaev-Zel'dovich effect. Observations were made at 8.8 GHz and in an ultra-compact 122.4m array configuration. Extended emission either due to radio halo sources or a blend of weak radio sources below the detection threshold, limited our ability to detect the SZ effect. However, upper limits to the SZ effect obtained for the cluster MS2137-23 was useful in constraining the cluster gas temperature when combined with the X-ray measurements and gravitational lensing constraints. The advantages of a multi-wavelength analysis of cluster mass density distributions and the properties of the intra-cluster medium were demonstrated through the examples of MS2137-23 and Abell 2218. Both clusters possess a giant arc that constrains the cluster central mass. In the case of Abell 2218 where there is a large amount of good data available in various wave-bands, we combined gravitational lensing constraints, optical photometry, measurements of the Sunyaev-Zel'dovich effect, X-ray surface brightness and temperature to constrain the cluster potential. H₀ and test the usual assumptions of mass-follows- light and hydrostatic equilibrium."],"dc:identifier.other":["b1945349"],"dc:identifier.uri":["http://hdl.handle.net/1885/136829"],"dc:language.iso":["en"],"dc:title":["Distribution of matter in clusters of galaxies"],"dc:type":["Thesis (PhD)"]},"updated_at":"2026-07-24T00:55:04Z"}