{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/98102"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/98102","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"The structure and evolution of dark matter halos and their implications for cosmology","abstract":"This is a study of how the properties of dark matter halos can be used to probe fundamental questions in cosmology. Similar to the inner regions of a halo the outer density profiles of the dark matter halo carry a wealth of information regarding its formation epoch, accretion history and environment. I study how the splashback feature, which is a steepening of the slope of the density profile in a narrow, localized region near the outskirts of the halo, is in reality a powerful physical length scale within the halo that naturally demarcates the actual boundary of its virialized region. This feature can also be used to probe cosmology and fundamental physical processes like dynamical friction. Apart from the density profile I also study the shapes of halos and how to measure them using three-point galaxy statistics and finally I study the evolution of substructure in dark matter halos and its implication for galaxy evolution in clustered environments.","abstract_html":"This is a study of how the properties of dark matter halos can be used to probe fundamental questions in cosmology. Similar to the inner regions of a halo the outer density profiles of the dark matter halo carry a wealth of information regarding its formation epoch, accretion history and environment. I study how the splashback feature, which is a steepening of the slope of the density profile in a narrow, localized region near the outskirts of the halo, is in reality a powerful physical length scale within the halo that naturally demarcates the actual boundary of its virialized region. This feature can also be used to probe cosmology and fundamental physical processes like dynamical friction. Apart from the density profile I also study the shapes of halos and how to measure them using three-point galaxy statistics and finally I study the evolution of substructure in dark matter halos and its implication for galaxy evolution in clustered environments.","abstract_has_math":false,"creators":["Adhikari, Susmita"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Astronomy","degree_department":null,"school":null,"contributors":["Dalal, Neal","Ricker, Paul","Fields, Brian","Vieira, Joaquin"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017-09-29T16:37:46Z","date_published":"2017-09-29T16:37:46Z","updated_at":"2026-07-22T22:24:34Z","subjects":["Halos","Splashback","Cluster","Dark Energy Survey (DES)","Cosmology","Spherical collapse","Sloan Digital Sky Survey (SDSS)"],"languages":["en"],"rights":["Copyright 2017 Susmita Adhikari"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/98102","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Dalal, Neal","Ricker, Paul","Fields, Brian","Vieira, Joaquin"]},{"key":"dc:creator","label":"Author","values":["Adhikari, Susmita"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2017-09-29T16:37:46Z","2017-05-25","2017-08"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Astronomy"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Halos","Splashback","Cluster","Dark Energy Survey (DES)","Cosmology","Spherical collapse","Sloan Digital Sky Survey (SDSS)"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2017 Susmita Adhikari"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/98102"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This is a study of how the properties of dark matter halos can be used to probe fundamental questions in cosmology. Similar to the inner regions of a halo the outer density profiles of the dark matter halo carry a wealth of information regarding its formation epoch, accretion history and environment. I study how the splashback feature, which is a steepening of the slope of the density profile in a narrow, localized region near the outskirts of the halo, is in reality a powerful physical length scale within the halo that naturally demarcates the actual boundary of its virialized region. This feature can also be used to probe cosmology and fundamental physical processes like dynamical friction. Apart from the density profile I also study the shapes of halos and how to measure them using three-point galaxy statistics and finally I study the evolution of substructure in dark matter halos and its implication for galaxy evolution in clustered environments.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-09-29 without embargo terms","The student, Susmita Adhikari, accepted the attached license on 2017-05-17 at 10:39.","The student, Susmita Adhikari, submitted this Dissertation for approval on 2017-05-17 at 10:54.","This Dissertation was approved for publication on 2017-05-25 at 15:13.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11159 on 2017-09-29 at 11:25:48","Made available in DSpace on 2017-09-29T16:37:46Z (GMT). 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I study how the splashback feature, which is a steepening of the slope of the density profile in a narrow, localized region near the outskirts of the halo, is in reality a powerful physical length scale within the halo that naturally demarcates the actual boundary of its virialized region. This feature can also be used to probe cosmology and fundamental physical processes like dynamical friction. Apart from the density profile I also study the shapes of halos and how to measure them using three-point galaxy statistics and finally I study the evolution of substructure in dark matter halos and its implication for galaxy evolution in clustered environments.","Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2017-09-29 without embargo terms","The student, Susmita Adhikari, accepted the attached license on 2017-05-17 at 10:39.","The student, Susmita Adhikari, submitted this Dissertation for approval on 2017-05-17 at 10:54.","This Dissertation was approved for publication on 2017-05-25 at 15:13.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11159 on 2017-09-29 at 11:25:48","Made available in DSpace on 2017-09-29T16:37:46Z (GMT). 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