{"id":{"repo_id":"heid-diss","oai_identifier":"oai:archiv.ub.uni-heidelberg.de:4595"},"canonical_url":"https://search.dev.ndltd.org/etd/heid-diss/oai:archiv.ub.uni-heidelberg.de:4595","repository":{"repo_id":"heid-diss","name":"Universität Heidelberg","base_url":"http://archiv.ub.uni-heidelberg.de/volltextserver/cgi/oai2"},"display":{"title":"Optical study of F, G and K stars in the ROSAT All-Sky Survey","abstract":"I analyze a sample of 107 southern stars of spectral types A to K, which were identified as the optical counterparts of X-ray sources detected by ROSAT during its All-Sky Survey. The study is conducted using optical observations, photometric as well as spectroscopic (high-resolution). Various parameters are determined for the sample objects, mainly spectral types and luminosity classes, absolute magnitudes, distances, radial velocities, projected rotational velocities, effective temperatures, Lithium abundances. I compare the X-ray parameters of my sample stars with those of a similar sample, detected by the Einstein Observatory during its Medium Sensitivity Survey (EMSS). I also look for correlations between the different stellar parameters determined for my sample, and compare those results to those obtained for the EMSS sample, and also to some results obtained from other, earlier studies.","abstract_html":"I analyze a sample of 107 southern stars of spectral types A to K, which were identified as the optical counterparts of X-ray sources detected by ROSAT during its All-Sky Survey. The study is conducted using optical observations, photometric as well as spectroscopic (high-resolution). Various parameters are determined for the sample objects, mainly spectral types and luminosity classes, absolute magnitudes, distances, radial velocities, projected rotational velocities, effective temperatures, Lithium abundances. I compare the X-ray parameters of my sample stars with those of a similar sample, detected by the Einstein Observatory during its Medium Sensitivity Survey (EMSS). I also look for correlations between the different stellar parameters determined for my sample, and compare those results to those obtained for the EMSS sample, and also to some results obtained from other, earlier studies.","abstract_has_math":false,"creators":["Metanomski, Agnès D.F."],"institution":"Universität Heidelberg","degree_name":null,"degree_level":"thesis.doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Krautter, Joachim"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1998,"date_issued":"1998-04-22","date_published":"1998-04-22","updated_at":"2026-07-24T02:29:49Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://www.ub.uni-heidelberg.de/archiv/4595","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Krautter, Joachim"]},{"key":"dc:creator","label":"Author","values":["Metanomski, Agnès D.F."]}]},{"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":["I analyze a sample of 107 southern stars of spectral types A to K, which were identified as the optical counterparts of X-ray sources detected by ROSAT during its All-Sky Survey. The study is conducted using optical observations, photometric as well as spectroscopic (high-resolution). Various parameters are determined for the sample objects, mainly spectral types and luminosity classes, absolute magnitudes, distances, radial velocities, projected rotational velocities, effective temperatures, Lithium abundances. I compare the X-ray parameters of my sample stars with those of a similar sample, detected by the Einstein Observatory during its Medium Sensitivity Survey (EMSS). I also look for correlations between the different stellar parameters determined for my sample, and compare those results to those obtained for the EMSS sample, and also to some results obtained from other, earlier studies.","Ich untersuche eine Stichprobe von 107 Südhimmels-Sternen von Spektraltyp A bis K. Diese Sterne sind als die optischen Gegenstücke zu Röntgen-Quellen, die der ROSAT Satellit während seines All-Sky Survey (RASS) entdeckte, identifiziert wurden. Die Untersuchung wird mit Hilfe optischen Beobachtungen, sowohl photometrischer als auch spektroskopischer, durchgeführt. Verschiedene Parameter werden für die untersuchten Objekte bestimmt, wie z.B. Spektraltyp und Leuchtkraftklasse, absolute Helligkeit, Entfernung, Radialgeschwindigkeit, projezierte Rotationsgeschwindigkeit, Effektivtemperatur, Lithium Häufigkeit. Ich vergleiche die Röntgen-Parameter meiner Stichproben-Sterne mit denen aus einer ähnlichen Stichprobe von Sternen, die vom Einstein Observatory während dessen Medium Sensitivity Survey (EMSS) entdeckt wurden. Ich suche auch nach Korrelationen zwischen verschiedenen Parametern, die für meine Stichproben-Sterne bestimmt wurden und vergleiche die Ergebnisse mit denen, die für die EMSS Stichprobe erhalten wurden, sowie mit den Ergebnissne anderer, früherer Studien."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Optical study of F, G and K stars in the ROSAT All-Sky Survey","Optische Studie von F, G und K Sterne im ROSAT All-sky Survey"]}]}],"canonical_facts":{"dc:contributor":["Krautter, Joachim"],"dc:creator":["Metanomski, Agnès D.F."],"dc:description.abstract":["I analyze a sample of 107 southern stars of spectral types A to K, which were identified as the optical counterparts of X-ray sources detected by ROSAT during its All-Sky Survey. The study is conducted using optical observations, photometric as well as spectroscopic (high-resolution). Various parameters are determined for the sample objects, mainly spectral types and luminosity classes, absolute magnitudes, distances, radial velocities, projected rotational velocities, effective temperatures, Lithium abundances. I compare the X-ray parameters of my sample stars with those of a similar sample, detected by the Einstein Observatory during its Medium Sensitivity Survey (EMSS). I also look for correlations between the different stellar parameters determined for my sample, and compare those results to those obtained for the EMSS sample, and also to some results obtained from other, earlier studies.","Ich untersuche eine Stichprobe von 107 Südhimmels-Sternen von Spektraltyp A bis K. Diese Sterne sind als die optischen Gegenstücke zu Röntgen-Quellen, die der ROSAT Satellit während seines All-Sky Survey (RASS) entdeckte, identifiziert wurden. Die Untersuchung wird mit Hilfe optischen Beobachtungen, sowohl photometrischer als auch spektroskopischer, durchgeführt. Verschiedene Parameter werden für die untersuchten Objekte bestimmt, wie z.B. Spektraltyp und Leuchtkraftklasse, absolute Helligkeit, Entfernung, Radialgeschwindigkeit, projezierte Rotationsgeschwindigkeit, Effektivtemperatur, Lithium Häufigkeit. Ich vergleiche die Röntgen-Parameter meiner Stichproben-Sterne mit denen aus einer ähnlichen Stichprobe von Sternen, die vom Einstein Observatory während dessen Medium Sensitivity Survey (EMSS) entdeckt wurden. Ich suche auch nach Korrelationen zwischen verschiedenen Parametern, die für meine Stichproben-Sterne bestimmt wurden und vergleiche die Ergebnisse mit denen, die für die EMSS Stichprobe erhalten wurden, sowie mit den Ergebnissne anderer, früherer Studien."],"dc:format.medium":["application/pdf"],"dc:publisher":["Universitätsbibliothek Heidelberg"],"dc:title":["Optical study of F, G and K stars in the ROSAT All-Sky Survey","Optische Studie von F, G und K Sterne im ROSAT All-sky Survey"],"dc:type":["doctoralThesis"],"thesis:degree_level":["thesis.doctoral"],"thesis:institution_name":["Universität Heidelberg"]},"updated_at":"2026-07-24T02:29:49Z"}