{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/40760"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/40760","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"The gas content of luminous compact blue galaxies in the COSMOS field","abstract":"Luminous compact blue galaxies (LCBGs) are a heterogeneous subset of starburst galaxies. Their number density drops quite significantly as we approach lower redshifts. As a set of galaxies that evolve quickly, they make excellent candidates for studying galactic evolution as a whole. In order to understand how galaxies evolve, we make use of LCBGs to study their gas content as it changes over approximately nine billion years of lookback time. We make use of HI emission line data provided by the full CHILES survey, covering a redshift range of z=0 to z=0.45 within the COSMOS f ield as well as continuum data of the same field provided by the CHILES Continuum Polarization survey. In this thesis we set out to study the properties of LCBGs in these f ields to better understand the nature of these objects as they evolve to the present day. We report on direct detections of HI found in LCBGs in CHILES.Wealsoperform acubelet stacking technique on LCBGs for which we have known spectroscopic redshifts in CHILES. From these stacks we measure average HI masses as well as upper limit values for non-detections to study how it evolves with redshift. We also measure the star formation rates of a set of LCBGs using continuum fluxes in CHILES Con Pol and compare our results to measurements made with data from CHILES's first epoch. Continuum stacking is then performed in several redshift and stellar mass bins to extract average star formation rates. We proceed to fit appropriate functions to these relations in order to quantify the dependence of LCBG sSFRs to their stellar mass and redshift.","abstract_html":"Luminous compact blue galaxies (LCBGs) are a heterogeneous subset of starburst galaxies. Their number density drops quite significantly as we approach lower redshifts. As a set of galaxies that evolve quickly, they make excellent candidates for studying galactic evolution as a whole. In order to understand how galaxies evolve, we make use of LCBGs to study their gas content as it changes over approximately nine billion years of lookback time. We make use of HI emission line data provided by the full CHILES survey, covering a redshift range of z=0 to z=0.45 within the COSMOS f ield as well as continuum data of the same field provided by the CHILES Continuum Polarization survey. In this thesis we set out to study the properties of LCBGs in these f ields to better understand the nature of these objects as they evolve to the present day. We report on direct detections of HI found in LCBGs in CHILES.Wealsoperform acubelet stacking technique on LCBGs for which we have known spectroscopic redshifts in CHILES. From these stacks we measure average HI masses as well as upper limit values for non-detections to study how it evolves with redshift. We also measure the star formation rates of a set of LCBGs using continuum fluxes in CHILES Con Pol and compare our results to measurements made with data from CHILES's first epoch. Continuum stacking is then performed in several redshift and stellar mass bins to extract average star formation rates. We proceed to fit appropriate functions to these relations in order to quantify the dependence of LCBG sSFRs to their stellar mass and redshift.","abstract_has_math":false,"creators":["Arlow, Henco"],"institution":"Department of Astronomy","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Pisano, Daniel J","Bershady, Matthew"],"committee_chairs":[],"committee_members":[],"year":2024,"date_issued":"2024","date_published":"2024","updated_at":"2026-07-22T22:23:33Z","subjects":["Luminous compact blue galaxies","LCBGs","heterogeneous","starburst galaxies"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/40760","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Pisano, Daniel J","Bershady, Matthew"]},{"key":"dc:creator","label":"Author","values":["Arlow, Henco"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2024-12-02T10:32:49Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2024-12-02T10:32:49Z"]},{"key":"dc:date.issued","label":"Date","values":["2024"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Astronomy"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cape Town"]},{"key":"dc:type","label":"Dc Type","values":["Thesis / Dissertation"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Masters","MSc"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Luminous compact blue galaxies","LCBGs","heterogeneous","starburst galaxies"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/40760"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Luminous compact blue galaxies (LCBGs) are a heterogeneous subset of starburst galaxies. Their number density drops quite significantly as we approach lower redshifts. As a set of galaxies that evolve quickly, they make excellent candidates for studying galactic evolution as a whole. In order to understand how galaxies evolve, we make use of LCBGs to study their gas content as it changes over approximately nine billion years of lookback time. We make use of HI emission line data provided by the full CHILES survey, covering a redshift range of z=0 to z=0.45 within the COSMOS f ield as well as continuum data of the same field provided by the CHILES Continuum Polarization survey. In this thesis we set out to study the properties of LCBGs in these f ields to better understand the nature of these objects as they evolve to the present day. We report on direct detections of HI found in LCBGs in CHILES.Wealsoperform acubelet stacking technique on LCBGs for which we have known spectroscopic redshifts in CHILES. From these stacks we measure average HI masses as well as upper limit values for non-detections to study how it evolves with redshift. We also measure the star formation rates of a set of LCBGs using continuum fluxes in CHILES Con Pol and compare our results to measurements made with data from CHILES's first epoch. Continuum stacking is then performed in several redshift and stellar mass bins to extract average star formation rates. We proceed to fit appropriate functions to these relations in order to quantify the dependence of LCBG sSFRs to their stellar mass and redshift."]},{"key":"dc:title","label":"Title","values":["The gas content of luminous compact blue galaxies in the COSMOS field"]}]}],"canonical_facts":{"dc:contributor.advisor":["Pisano, Daniel J","Bershady, Matthew"],"dc:creator":["Arlow, Henco"],"dc:date.accessioned":["2024-12-02T10:32:49Z"],"dc:date.available":["2024-12-02T10:32:49Z"],"dc:date.issued":["2024"],"dc:description.abstract":["Luminous compact blue galaxies (LCBGs) are a heterogeneous subset of starburst galaxies. Their number density drops quite significantly as we approach lower redshifts. As a set of galaxies that evolve quickly, they make excellent candidates for studying galactic evolution as a whole. In order to understand how galaxies evolve, we make use of LCBGs to study their gas content as it changes over approximately nine billion years of lookback time. We make use of HI emission line data provided by the full CHILES survey, covering a redshift range of z=0 to z=0.45 within the COSMOS f ield as well as continuum data of the same field provided by the CHILES Continuum Polarization survey. In this thesis we set out to study the properties of LCBGs in these f ields to better understand the nature of these objects as they evolve to the present day. We report on direct detections of HI found in LCBGs in CHILES.Wealsoperform acubelet stacking technique on LCBGs for which we have known spectroscopic redshifts in CHILES. From these stacks we measure average HI masses as well as upper limit values for non-detections to study how it evolves with redshift. We also measure the star formation rates of a set of LCBGs using continuum fluxes in CHILES Con Pol and compare our results to measurements made with data from CHILES's first epoch. Continuum stacking is then performed in several redshift and stellar mass bins to extract average star formation rates. We proceed to fit appropriate functions to these relations in order to quantify the dependence of LCBG sSFRs to their stellar mass and redshift."],"dc:identifier.uri":["http://hdl.handle.net/11427/40760"],"dc:publisher.department":["Department of Astronomy"],"dc:publisher.institution":["University of Cape Town"],"dc:subject":["Luminous compact blue galaxies","LCBGs","heterogeneous","starburst galaxies"],"dc:title":["The gas content of luminous compact blue galaxies in the COSMOS field"],"dc:type":["Thesis / Dissertation"],"dc:type.qualificationlevel":["Masters","MSc"]},"updated_at":"2026-07-22T22:23:33Z"}