{"id":{"repo_id":"ohiolink","oai_identifier":"oai:etd.ohiolink.edu:ohiou1364229568"},"canonical_url":"https://search.dev.ndltd.org/etd/ohiolink/oai:etd.ohiolink.edu:ohiou1364229568","repository":{"repo_id":"ohiolink","name":"OhioLINK","base_url":"https://etd.ohiolink.edu/acprod/odb_etd/ws/oai/oai"},"display":{"title":"Modeling the Dark Matter of Galaxy Clusters Using the Tensor-Vector-Scalar Theory of Alternate Gravity","abstract":"The invocation of dark matter in the universe is predicated upon gravitational observations that cannot be explained by the amount of luminous matter that we detect. There is an ongoing debate over which gravitational model is correct. The work herein tests a prescription of gravity theory known as Tensor-Vector-Scalar and is based upon the work of Angus et al. (2007). We add upon this work by extending the sample of galaxy clusters to five and testing the accepted Navarro, Frenk & White (NFW) dark matter potential (Navarro et al., 1996). Our independent implementation of this method includes weak gravitational lensing analysis to determine the amount of dark matter in these galaxy clusters by calculating the gas fraction fgas = Mgas=Mtot. The ability of the Tensor-Vector-Scalar theory to predict a consistent fgas across all galaxy clusters is a measure of its liklihood of being the correct gravity model.","abstract_html":"The invocation of dark matter in the universe is predicated upon gravitational observations that cannot be explained by the amount of luminous matter that we detect. There is an ongoing debate over which gravitational model is correct. The work herein tests a prescription of gravity theory known as Tensor-Vector-Scalar and is based upon the work of Angus et al. (2007). We add upon this work by extending the sample of galaxy clusters to five and testing the accepted Navarro, Frenk & White (NFW) dark matter potential (Navarro et al., 1996). Our independent implementation of this method includes weak gravitational lensing analysis to determine the amount of dark matter in these galaxy clusters by calculating the gas fraction fgas = Mgas=Mtot. The ability of the Tensor-Vector-Scalar theory to predict a consistent fgas across all galaxy clusters is a measure of its liklihood of being the correct gravity model.","abstract_has_math":false,"creators":["Ragozzine, Brett"],"institution":"Ohio University","degree_name":"Doctor of Philosophy (PhD)","degree_level":"doctoral","degree_discipline":"Physics and Astronomy (Arts and Sciences)","degree_department":null,"school":null,"contributors":["Clowe, Douglas"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-06-10","date_published":"2013-06-10","updated_at":"2026-07-24T03:37:01Z","subjects":["Astrophysics","Physics","dark matter","galaxy clusters","alternate gravity","TeVeS","X-ray gas"],"languages":["English"],"rights":["unrestricted","This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1364229568","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Clowe, Douglas"]},{"key":"dc:creator","label":"Author","values":["Ragozzine, Brett"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2013-06-10"]},{"key":"dc:publisher","label":"Institution","values":["Ohio University / OhioLINK"]},{"key":"dc:type","label":"Dc Type","values":["Electronic Thesis or Dissertation"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics and Astronomy (Arts and Sciences)"]},{"key":"thesis:degree_level","label":"Degree Level","values":["doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy (PhD)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Ohio University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Astrophysics","Physics","dark matter","galaxy clusters","alternate gravity","TeVeS","X-ray gas"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["unrestricted","This thesis or dissertation is protected by copyright: all rights reserved. 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Our independent implementation of this method includes weak gravitational lensing analysis to determine the amount of dark matter in these galaxy clusters by calculating the gas fraction fgas = Mgas=Mtot. The ability of the Tensor-Vector-Scalar theory to predict a consistent fgas across all galaxy clusters is a measure of its liklihood of being the correct gravity model."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf","5.77 MB"]},{"key":"dc:title","label":"Title","values":["Modeling the Dark Matter of Galaxy Clusters Using the Tensor-Vector-Scalar Theory of Alternate Gravity"]}]}],"canonical_facts":{"dc:contributor":["Clowe, Douglas"],"dc:creator":["Ragozzine, Brett"],"dc:date":["2013-06-10"],"dc:description":["The invocation of dark matter in the universe is predicated upon gravitational observations that cannot be explained by the amount of luminous matter that we detect. There is an ongoing debate over which gravitational model is correct. The work herein tests a prescription of gravity theory known as Tensor-Vector-Scalar and is based upon the work of Angus et al. (2007). We add upon this work by extending the sample of galaxy clusters to five and testing the accepted Navarro, Frenk & White (NFW) dark matter potential (Navarro et al., 1996). Our independent implementation of this method includes weak gravitational lensing analysis to determine the amount of dark matter in these galaxy clusters by calculating the gas fraction fgas = Mgas=Mtot. The ability of the Tensor-Vector-Scalar theory to predict a consistent fgas across all galaxy clusters is a measure of its liklihood of being the correct gravity model."],"dc:format":["application/pdf","5.77 MB"],"dc:identifier":["http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1364229568"],"dc:language":["English"],"dc:publisher":["Ohio University / OhioLINK"],"dc:rights":["unrestricted","This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws."],"dc:subject":["Astrophysics","Physics","dark matter","galaxy clusters","alternate gravity","TeVeS","X-ray gas"],"dc:title":["Modeling the Dark Matter of Galaxy Clusters Using the Tensor-Vector-Scalar Theory of Alternate Gravity"],"dc:type":["Electronic Thesis or Dissertation"],"thesis:degree_discipline":["Physics and Astronomy (Arts and Sciences)"],"thesis:degree_level":["doctoral"],"thesis:degree_name":["Doctor of Philosophy (PhD)"],"thesis:institution_name":["Ohio University"]},"updated_at":"2026-07-24T03:37:01Z"}