Matches in SemOpenAlex for { <https://semopenalex.org/work/W4301355375> ?p ?o ?g. }
Showing items 1 to 74 of
74
with 100 items per page.
- W4301355375 abstract "HST archival FOS spectra of 40 QSOs with z <= 0.5 in the Bright Quasar Survey have been analyzed. The spectra cover the region 1800-2000 A in the QSOs' rest frames, including the Al III 1859, Si III] 1892, C III] 1909, and Fe III UV34 emission-lines. We measured the flux of these UV emission-lines, and analyzed the correlations among UV and optical (H beta, Fe II, and [O III]) emission-line properties as well as soft X-ray photon indices. We found a significant correlation between Si III]/C III] and Fe II/H beta. Si III and C III have similar ionization potentials, but Si III] has one order magnitude larger critical density than C III]. Si III]/C III] is thus a density indicator and becomes larger when density is higher. The correlation between Si III]/C III] and Fe II/H beta indicates that optical Fe II becomes strong when the density of the broad line region becomes high. Our correlation analysis shows that large Si III]/C III] associates with weak [O III] 5007, large soft X-ray photon index, and narrow H beta width as well as with large Fe II/H beta. Our results support the previous suggestions that the density of the broad line region gas and the mass accretion rate govern this correlation." @default.
- W4301355375 created "2022-10-05" @default.
- W4301355375 creator A5056126580 @default.
- W4301355375 creator A5060328311 @default.
- W4301355375 date "1998-12-19" @default.
- W4301355375 modified "2023-09-26" @default.
- W4301355375 title "The Correlation between Si III] 1892/ C III] 1909 and Fe II 4500/ H beta in low redshift QSOs" @default.
- W4301355375 hasPublicationYear "1998" @default.
- W4301355375 type Work @default.
- W4301355375 citedByCount "0" @default.
- W4301355375 crossrefType "posted-content" @default.
- W4301355375 hasAuthorship W4301355375A5056126580 @default.
- W4301355375 hasAuthorship W4301355375A5060328311 @default.
- W4301355375 hasBestOaLocation W43013553751 @default.
- W4301355375 hasConcept C113196181 @default.
- W4301355375 hasConcept C121332964 @default.
- W4301355375 hasConcept C1276947 @default.
- W4301355375 hasConcept C135041427 @default.
- W4301355375 hasConcept C145148216 @default.
- W4301355375 hasConcept C185592680 @default.
- W4301355375 hasConcept C198291218 @default.
- W4301355375 hasConcept C198352243 @default.
- W4301355375 hasConcept C199360897 @default.
- W4301355375 hasConcept C2524010 @default.
- W4301355375 hasConcept C26141928 @default.
- W4301355375 hasConcept C2776174256 @default.
- W4301355375 hasConcept C2776968204 @default.
- W4301355375 hasConcept C33024259 @default.
- W4301355375 hasConcept C33923547 @default.
- W4301355375 hasConcept C41008148 @default.
- W4301355375 hasConcept C43617362 @default.
- W4301355375 hasConcept C44870925 @default.
- W4301355375 hasConcept C4839761 @default.
- W4301355375 hasConcept C62520636 @default.
- W4301355375 hasConcept C96141758 @default.
- W4301355375 hasConcept C98444146 @default.
- W4301355375 hasConceptScore W4301355375C113196181 @default.
- W4301355375 hasConceptScore W4301355375C121332964 @default.
- W4301355375 hasConceptScore W4301355375C1276947 @default.
- W4301355375 hasConceptScore W4301355375C135041427 @default.
- W4301355375 hasConceptScore W4301355375C145148216 @default.
- W4301355375 hasConceptScore W4301355375C185592680 @default.
- W4301355375 hasConceptScore W4301355375C198291218 @default.
- W4301355375 hasConceptScore W4301355375C198352243 @default.
- W4301355375 hasConceptScore W4301355375C199360897 @default.
- W4301355375 hasConceptScore W4301355375C2524010 @default.
- W4301355375 hasConceptScore W4301355375C26141928 @default.
- W4301355375 hasConceptScore W4301355375C2776174256 @default.
- W4301355375 hasConceptScore W4301355375C2776968204 @default.
- W4301355375 hasConceptScore W4301355375C33024259 @default.
- W4301355375 hasConceptScore W4301355375C33923547 @default.
- W4301355375 hasConceptScore W4301355375C41008148 @default.
- W4301355375 hasConceptScore W4301355375C43617362 @default.
- W4301355375 hasConceptScore W4301355375C44870925 @default.
- W4301355375 hasConceptScore W4301355375C4839761 @default.
- W4301355375 hasConceptScore W4301355375C62520636 @default.
- W4301355375 hasConceptScore W4301355375C96141758 @default.
- W4301355375 hasConceptScore W4301355375C98444146 @default.
- W4301355375 hasLocation W43013553751 @default.
- W4301355375 hasOpenAccess W4301355375 @default.
- W4301355375 hasPrimaryLocation W43013553751 @default.
- W4301355375 hasRelatedWork W1530751381 @default.
- W4301355375 hasRelatedWork W2063294917 @default.
- W4301355375 hasRelatedWork W2078902449 @default.
- W4301355375 hasRelatedWork W2080740544 @default.
- W4301355375 hasRelatedWork W2084606955 @default.
- W4301355375 hasRelatedWork W2111512453 @default.
- W4301355375 hasRelatedWork W2516056038 @default.
- W4301355375 hasRelatedWork W2951170748 @default.
- W4301355375 hasRelatedWork W3017349062 @default.
- W4301355375 hasRelatedWork W4206820831 @default.
- W4301355375 isParatext "false" @default.
- W4301355375 isRetracted "false" @default.
- W4301355375 workType "article" @default.