{"id":{"repo_id":"heid-diss","oai_identifier":"oai:archiv.ub.uni-heidelberg.de:3067"},"canonical_url":"https://search.dev.ndltd.org/etd/heid-diss/oai:archiv.ub.uni-heidelberg.de:3067","repository":{"repo_id":"heid-diss","name":"Universität Heidelberg","base_url":"http://archiv.ub.uni-heidelberg.de/volltextserver/cgi/oai2"},"display":{"title":"Emission Line Galaxies from CADIS : High Redshift Lyman-Alpha Galaxies and Metal Poor Galaxies at Medium Redshift","abstract":"In this thesis, metal poor galaxies at 0.4<z<0.7 and Ly-alpha galaxies at z>4.7 have been searched for and investigated in a sample of 600 faint emission line galaxies from four fields of the Calar Alto Deep Imaging Survey (CADIS). Employing an imaging Fabry-Perot interferometer, CADIS detects emission lines in three waveband windows, free of night-sky emission lines, at 700 nm, 820 nm, and 920 nm. Metal poor galaxies at 0.4<z<0.7 have been selected by their high [OIII]5007 / [OII]3727 ratios. Their oxygen abundances, determined by follow-up spectroscopy, indicate that the metallicity-luminosity relation which applies to galaxies in the local universe also holds at z=0.6. Ly-alpha galaxy candidates from the emission line sample, which contains more than 97% of objects at z<1.2 , are selected by the absence of flux below the Lyman limit (B-band ``dropouts''), and the non-detection of secondary emission lines in narrow band filters. For two Ly-alpha candidates, the emission line detected in the Fabry-Perot has been verified spectroscopically. The comparison of number counts of Lyman-alpha galaxies from CADIS with those of other Ly-alpha surveys at z>3 , and with model predictions, indicates that bright Ly-alpha galaxies are so rare beyond z=5 that a non-evolving population can be excluded.","abstract_html":"In this thesis, metal poor galaxies at 0.4&lt;z&lt;0.7 and Ly-alpha galaxies at z&gt;4.7 have been searched for and investigated in a sample of 600 faint emission line galaxies from four fields of the Calar Alto Deep Imaging Survey (CADIS). Employing an imaging Fabry-Perot interferometer, CADIS detects emission lines in three waveband windows, free of night-sky emission lines, at 700 nm, 820 nm, and 920 nm. Metal poor galaxies at 0.4&lt;z&lt;0.7 have been selected by their high [OIII]5007 / [OII]3727 ratios. Their oxygen abundances, determined by follow-up spectroscopy, indicate that the metallicity-luminosity relation which applies to galaxies in the local universe also holds at z=0.6. Ly-alpha galaxy candidates from the emission line sample, which contains more than 97% of objects at z&lt;1.2 , are selected by the absence of flux below the Lyman limit (B-band ``dropouts&#x27;&#x27;), and the non-detection of secondary emission lines in narrow band filters. For two Ly-alpha candidates, the emission line detected in the Fabry-Perot has been verified spectroscopically. The comparison of number counts of Lyman-alpha galaxies from CADIS with those of other Ly-alpha surveys at z&gt;3 , and with model predictions, indicates that bright Ly-alpha galaxies are so rare beyond z=5 that a non-evolving population can be excluded.","abstract_has_math":false,"creators":["Maier, Christian"],"institution":"Universität Heidelberg","degree_name":null,"degree_level":"thesis.doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Meisenheimer, Klaus"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2002,"date_issued":"2002-12-04","date_published":"2002-12-04","updated_at":"2026-07-24T02:29:25Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://www.ub.uni-heidelberg.de/archiv/3067","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Meisenheimer, Klaus"]},{"key":"dc:creator","label":"Author","values":["Maier, Christian"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["Universitätsbibliothek Heidelberg"]},{"key":"dc:type","label":"Dc Type","values":["doctoralThesis"]},{"key":"thesis:degree_level","label":"Degree Level","values":["thesis.doctoral"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Universität Heidelberg"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["In this thesis, metal poor galaxies at 0.4<z<0.7 and Ly-alpha galaxies at z>4.7 have been searched for and investigated in a sample of 600 faint emission line galaxies from four fields of the Calar Alto Deep Imaging Survey (CADIS). Employing an imaging Fabry-Perot interferometer, CADIS detects emission lines in three waveband windows, free of night-sky emission lines, at 700 nm, 820 nm, and 920 nm. Metal poor galaxies at 0.4<z<0.7 have been selected by their high [OIII]5007 / [OII]3727 ratios. Their oxygen abundances, determined by follow-up spectroscopy, indicate that the metallicity-luminosity relation which applies to galaxies in the local universe also holds at z=0.6. Ly-alpha galaxy candidates from the emission line sample, which contains more than 97% of objects at z<1.2 , are selected by the absence of flux below the Lyman limit (B-band ``dropouts''), and the non-detection of secondary emission lines in narrow band filters. For two Ly-alpha candidates, the emission line detected in the Fabry-Perot has been verified spectroscopically. The comparison of number counts of Lyman-alpha galaxies from CADIS with those of other Ly-alpha surveys at z>3 , and with model predictions, indicates that bright Ly-alpha galaxies are so rare beyond z=5 that a non-evolving population can be excluded.","In dieser Arbeit werden metallarme Galaxien bei 0.4<z<0.7 und Ly-alpha Galaxien bei z>4.7 anhand eines Samples von 600 schwachen Emissionsliniengalaxien von dem Calar Alto Deep Imaging Survey (CADIS) gesucht und untersucht. CADIS weist Emissionsliniengalaxien mit Hilfe eines Fabry-Perot-Interferometers in drei Wellenlaengenintervallen nach, die in Fenster minimaler Nachthimmelsemission bei 700 nm, 820 nm, und 920 nm platziert sind. Metallarme Galaxien bei 0.4<z<0.7 werden anhand ihrer hohen Flussverhaeltnisse [OIII]5007 / [OII]3727 selektiert. Ihre Sauerstoffhaeufigkeiten, die durch spekroskopische Nachbeobachtungen bestimmt wurden, zeigen, dass die Metallizitaet-Leuchtkraft Beziehung, die im lokalen Universum bekannt ist, auch bei z=0.6 Gueltigkeit besitzt. Ly-alpha Galaxien-Kandidaten werden aus dem Emissionsliniensample selektiert, das mehr als 97% Vordergrundgalaxien bei z<1.2 enthaelt. Die Selektion erfolgt anhand des verschwindenen Flusses unterhalb der Lyman-Kante (kein B Fluss) und dem Nichtvorhandensein einer zweiten Emissionslinie in bestimmten Schmalbandfiltern. Bei zwei Lyman-alpha Kandidaten konnte die Emissionslinie, die im Fabry-Perot gefunden wurde, spektroskopisch bestaetigt werden. Der Vergleich der kumulativen Dichten der Lyman-alpha Galaxien von CADIS mit denen von anderen Surveys bei z>3 sowie mit Modellvorhersagen deutet an, dass helle Lyman-alpha Galaxien so selten bei z>5 sind, dass eine sich nicht entwickelnde Population ausgeschlossen werden kann."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Emission Line Galaxies from CADIS : High Redshift Lyman-Alpha Galaxies and Metal Poor Galaxies at Medium Redshift","Emissionsliniengalaxien von CADIS : hochrotverschobene Lyman-Alpha Galaxien und metallarme Galaxien bei mittleren Rotverschiebung"]}]}],"canonical_facts":{"dc:contributor":["Meisenheimer, Klaus"],"dc:creator":["Maier, Christian"],"dc:description.abstract":["In this thesis, metal poor galaxies at 0.4<z<0.7 and Ly-alpha galaxies at z>4.7 have been searched for and investigated in a sample of 600 faint emission line galaxies from four fields of the Calar Alto Deep Imaging Survey (CADIS). Employing an imaging Fabry-Perot interferometer, CADIS detects emission lines in three waveband windows, free of night-sky emission lines, at 700 nm, 820 nm, and 920 nm. Metal poor galaxies at 0.4<z<0.7 have been selected by their high [OIII]5007 / [OII]3727 ratios. Their oxygen abundances, determined by follow-up spectroscopy, indicate that the metallicity-luminosity relation which applies to galaxies in the local universe also holds at z=0.6. Ly-alpha galaxy candidates from the emission line sample, which contains more than 97% of objects at z<1.2 , are selected by the absence of flux below the Lyman limit (B-band ``dropouts''), and the non-detection of secondary emission lines in narrow band filters. For two Ly-alpha candidates, the emission line detected in the Fabry-Perot has been verified spectroscopically. The comparison of number counts of Lyman-alpha galaxies from CADIS with those of other Ly-alpha surveys at z>3 , and with model predictions, indicates that bright Ly-alpha galaxies are so rare beyond z=5 that a non-evolving population can be excluded.","In dieser Arbeit werden metallarme Galaxien bei 0.4<z<0.7 und Ly-alpha Galaxien bei z>4.7 anhand eines Samples von 600 schwachen Emissionsliniengalaxien von dem Calar Alto Deep Imaging Survey (CADIS) gesucht und untersucht. CADIS weist Emissionsliniengalaxien mit Hilfe eines Fabry-Perot-Interferometers in drei Wellenlaengenintervallen nach, die in Fenster minimaler Nachthimmelsemission bei 700 nm, 820 nm, und 920 nm platziert sind. Metallarme Galaxien bei 0.4<z<0.7 werden anhand ihrer hohen Flussverhaeltnisse [OIII]5007 / [OII]3727 selektiert. Ihre Sauerstoffhaeufigkeiten, die durch spekroskopische Nachbeobachtungen bestimmt wurden, zeigen, dass die Metallizitaet-Leuchtkraft Beziehung, die im lokalen Universum bekannt ist, auch bei z=0.6 Gueltigkeit besitzt. Ly-alpha Galaxien-Kandidaten werden aus dem Emissionsliniensample selektiert, das mehr als 97% Vordergrundgalaxien bei z<1.2 enthaelt. Die Selektion erfolgt anhand des verschwindenen Flusses unterhalb der Lyman-Kante (kein B Fluss) und dem Nichtvorhandensein einer zweiten Emissionslinie in bestimmten Schmalbandfiltern. Bei zwei Lyman-alpha Kandidaten konnte die Emissionslinie, die im Fabry-Perot gefunden wurde, spektroskopisch bestaetigt werden. Der Vergleich der kumulativen Dichten der Lyman-alpha Galaxien von CADIS mit denen von anderen Surveys bei z>3 sowie mit Modellvorhersagen deutet an, dass helle Lyman-alpha Galaxien so selten bei z>5 sind, dass eine sich nicht entwickelnde Population ausgeschlossen werden kann."],"dc:format.medium":["application/pdf"],"dc:publisher":["Universitätsbibliothek Heidelberg"],"dc:title":["Emission Line Galaxies from CADIS : High Redshift Lyman-Alpha Galaxies and Metal Poor Galaxies at Medium Redshift","Emissionsliniengalaxien von CADIS : hochrotverschobene Lyman-Alpha Galaxien und metallarme Galaxien bei mittleren Rotverschiebung"],"dc:type":["doctoralThesis"],"thesis:degree_level":["thesis.doctoral"],"thesis:institution_name":["Universität Heidelberg"]},"updated_at":"2026-07-24T02:29:25Z"}