Motivated by the evidence of relationships between pitch angle (the tightness of spiral arm structure in the disk), P, and various indicators of central mass concentration, as well as the theoretical relationship between halo mass concentration and the density of visible matter in the central part of the galaxy, we look at a possible relationship between P and cvir (the virial concentration of the dark matter halo) in N-body simulations of barred, spiral galaxies. We also look at the evolution of pitch angle over time in higher temporal resolution than any data currently available in the literature. We find that pitch angle structure is recurring, the overall distribution staying within a relatively narrow range. We do not find evidence for a relation between P and cvir.
","abstract_html":"<p>Motivated by the evidence of relationships between pitch angle (the tightness of spiral arm structure in the disk), P, and various indicators of central mass concentration, as well as the theoretical relationship between halo mass concentration and the density of visible matter in the central part of the galaxy, we look at a possible relationship between P and cvir (the virial concentration of the dark matter halo) in N-body simulations of barred, spiral galaxies. We also look at the evolution of pitch angle over time in higher temporal resolution than any data currently available in the literature. We find that pitch angle structure is recurring, the overall distribution staying within a relatively narrow range. We do not find evidence for a relation between P and cvir.</p>","abstract_has_math":false,"creators":["Berlanga Medina, Jazmin Esmeralda"],"institution":null,"degree_name":"Master of Science in Physics (MS)","degree_level":"Thesis","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Kennefick, Julia D.","Arnold, Mark E."],"advisors":["Kennefick, Daniel J."],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-12-01T08:00:00Z","date_published":"2015-12-01T08:00:00Z","updated_at":"2026-07-24T00:59:24Z","subjects":["Pure sciences","Barred spiral galaxies","Cosmology theory","Dark matter","Galaxies","Galaxy evolution","N-body","Spiral galaxies","External Galaxies","Other Astrophysics and Astronomy","Other Physics"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://scholarworks.uark.edu/etd/1439","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Kennefick, Julia D.","Arnold, Mark E."]},{"key":"dc:contributor.advisor","label":"Advisor","values":["Kennefick, Daniel J."]},{"key":"dc:creator","label":"Author","values":["Berlanga Medina, Jazmin Esmeralda"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2017-09-29T07:00:00Z"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science in Physics (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Pure sciences","Barred spiral galaxies","Cosmology theory","Dark matter","Galaxies","Galaxy evolution","N-body","Spiral galaxies","External Galaxies","Other Astrophysics and Astronomy","Other Physics"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarworks.uark.edu/etd/1439"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Motivated by the evidence of relationships between pitch angle (the tightness of spiral arm structure in the disk), P, and various indicators of central mass concentration, as well as the theoretical relationship between halo mass concentration and the density of visible matter in the central part of the galaxy, we look at a possible relationship between P and cvir (the virial concentration of the dark matter halo) in N-body simulations of barred, spiral galaxies. We also look at the evolution of pitch angle over time in higher temporal resolution than any data currently available in the literature. We find that pitch angle structure is recurring, the overall distribution staying within a relatively narrow range. We do not find evidence for a relation between P and cvir.
"]},{"key":"dc:title","label":"Title","values":["Dark Matter Halo Concentration and the Evolution of Spiral Structure in N-Body, Barred Spiral Galaxies"]}]}],"canonical_facts":{"dc:contributor":["Kennefick, Julia D.","Arnold, Mark E."],"dc:contributor.advisor":["Kennefick, Daniel J."],"dc:creator":["Berlanga Medina, Jazmin Esmeralda"],"dc:date":["2015"],"dc:date.available":["2017-09-29T07:00:00Z"],"dc:description.abstract":["Motivated by the evidence of relationships between pitch angle (the tightness of spiral arm structure in the disk), P, and various indicators of central mass concentration, as well as the theoretical relationship between halo mass concentration and the density of visible matter in the central part of the galaxy, we look at a possible relationship between P and cvir (the virial concentration of the dark matter halo) in N-body simulations of barred, spiral galaxies. We also look at the evolution of pitch angle over time in higher temporal resolution than any data currently available in the literature. We find that pitch angle structure is recurring, the overall distribution staying within a relatively narrow range. We do not find evidence for a relation between P and cvir.
"],"dc:identifier":["https://scholarworks.uark.edu/etd/1439"],"dc:subject":["Pure sciences","Barred spiral galaxies","Cosmology theory","Dark matter","Galaxies","Galaxy evolution","N-body","Spiral galaxies","External Galaxies","Other Astrophysics and Astronomy","Other Physics"],"dc:title":["Dark Matter Halo Concentration and the Evolution of Spiral Structure in N-Body, Barred Spiral Galaxies"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science in Physics (MS)"]},"updated_at":"2026-07-24T00:59:24Z"}