{"id":{"repo_id":"unlv","oai_identifier":"oai:oasis.library.unlv.edu:rtds-1894"},"canonical_url":"https://search.dev.ndltd.org/etd/unlv/oai:oasis.library.unlv.edu:rtds-1894","repository":{"repo_id":"unlv","name":"University of Nevada - Las Vegas","base_url":"https://oasis.library.unlv.edu/do/oai/"},"display":{"title":"A study of x-ray substructure in rich clusters of galaxies","abstract":"A comparison of three tests to determine substructure in rich Abell clusters of galaxies was preformed and the results are presented in this paper. The data used are ROSAT PSPC X-ray images of a sample of 21 clusters drawn from the ACO catalog, and a subset of the ESO Nearby Abell Cluster Survey done by Katgert et, al. The three methods used are: the 'center shift' method developed by Mohr et al., the 'moment' method developed by Buote & Tsai and a wavelet analysis developed by Starck et al. Models were then created to check the significance of our findings. The conclusions reached were that substructure and cooling flows are present in at least 50% of our sample. In addition, although it is possible to get a generally accurate result using only one of the above methods, the use of a multi-pronged analysis approach to achieve maximum accuracy is desirable.","abstract_html":"A comparison of three tests to determine substructure in rich Abell clusters of galaxies was preformed and the results are presented in this paper. The data used are ROSAT PSPC X-ray images of a sample of 21 clusters drawn from the ACO catalog, and a subset of the ESO Nearby Abell Cluster Survey done by Katgert et, al. The three methods used are: the 'center shift' method developed by Mohr et al., the 'moment' method developed by Buote & Tsai and a wavelet analysis developed by Starck et al. Models were then created to check the significance of our findings. The conclusions reached were that substructure and cooling flows are present in at least 50% of our sample. In addition, although it is possible to get a generally accurate result using only one of the above methods, the use of a multi-pronged analysis approach to achieve maximum accuracy is desirable.","abstract_has_math":false,"creators":["Rogers, Philip Leroy"],"institution":"University of Nevada, Las Vegas","degree_name":"Master of Science (MS)","degree_level":"Thesis","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["George Rhee"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1998,"date_issued":"1998-01-01T08:00:00Z","date_published":"1998-01-01T08:00:00Z","updated_at":"2026-07-24T05:24:53Z","subjects":[],"languages":[],"rights":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://oasis.library.unlv.edu/rtds/895"],"render_values":[{"text":"https://oasis.library.unlv.edu/rtds/895","href":"https://oasis.library.unlv.edu/rtds/895","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.25669/8q3w-3m3y","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["George Rhee"]},{"key":"dc:creator","label":"Author","values":["Rogers, Philip Leroy"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["University of Nevada, Las Vegas"]},{"key":"dc:type","label":"Dc Type","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.25669/8q3w-3m3y","https://oasis.library.unlv.edu/rtds/895","https://oasis.library.unlv.edu/context/rtds/article/1894/viewcontent/uc.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A comparison of three tests to determine substructure in rich Abell clusters of galaxies was preformed and the results are presented in this paper. The data used are ROSAT PSPC X-ray images of a sample of 21 clusters drawn from the ACO catalog, and a subset of the ESO Nearby Abell Cluster Survey done by Katgert et, al. The three methods used are: the 'center shift' method developed by Mohr et al., the 'moment' method developed by Buote & Tsai and a wavelet analysis developed by Starck et al. Models were then created to check the significance of our findings. The conclusions reached were that substructure and cooling flows are present in at least 50% of our sample. In addition, although it is possible to get a generally accurate result using only one of the above methods, the use of a multi-pronged analysis approach to achieve maximum accuracy is desirable."]},{"key":"dc:format","label":"Dc Format","values":["pdf"]},{"key":"dc:title","label":"Title","values":["A study of x-ray substructure in rich clusters of galaxies"]}]}],"canonical_facts":{"dc:contributor":["George Rhee"],"dc:creator":["Rogers, Philip Leroy"],"dc:description.abstract":["A comparison of three tests to determine substructure in rich Abell clusters of galaxies was preformed and the results are presented in this paper. The data used are ROSAT PSPC X-ray images of a sample of 21 clusters drawn from the ACO catalog, and a subset of the ESO Nearby Abell Cluster Survey done by Katgert et, al. The three methods used are: the 'center shift' method developed by Mohr et al., the 'moment' method developed by Buote & Tsai and a wavelet analysis developed by Starck et al. Models were then created to check the significance of our findings. The conclusions reached were that substructure and cooling flows are present in at least 50% of our sample. In addition, although it is possible to get a generally accurate result using only one of the above methods, the use of a multi-pronged analysis approach to achieve maximum accuracy is desirable."],"dc:format":["pdf"],"dc:identifier":["10.25669/8q3w-3m3y","https://oasis.library.unlv.edu/rtds/895","https://oasis.library.unlv.edu/context/rtds/article/1894/viewcontent/uc.pdf"],"dc:publisher":["University of Nevada, Las Vegas"],"dc:rights":["IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["A study of x-ray substructure in rich clusters of galaxies"],"dc:type":["Text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T05:24:53Z"}