Matches in SemOpenAlex for { <https://semopenalex.org/work/W2007684380> ?p ?o ?g. }
Showing items 1 to 83 of
83
with 100 items per page.
- W2007684380 endingPage "872" @default.
- W2007684380 startingPage "867" @default.
- W2007684380 abstract "We consider the properties of soft X-ray emission lines in the reprocessed emission from a photoionized accretion disc. Observations of these lines will be important in determining the ionization state and metallicity ofthe innermost regions of active galaxies. Calculations of reflection from a constant-density disc with an ionization parameter, ξ, between 250 and 1000 erg cm s - 1 show that emission from O VIII Lya will dominate the soft X-ray emission spectrum. There is also significant emission from C VI, N VII, O VII and Fe XVII-XIX. As ξ is increased these lines become weaker and are broadened by Compton scattering. Significantly increasing the O abundance primarily strengthens the O VII line, making it as large or larger than the O VIII line. The nitrogen and carbon lines are quite weak with equivalent widths (EWs) <30 eV, even with an increase in the N abundance. A hydrostatic ionized disc model has a more realistic density structure and shows a similar spectrum, but with the lines weaker and broader. This is a result of the hot ionized skin at the surface of the disc. We apply these results to the controversial claim of soft X-ray relativistic lines in the XMM-Newton spectrum of MCG-6-30-15. We are unable to find a situation where O VIII has the required EW without substantial emission from O VII. Furthermore, Compton scattering results in the blue wing of the O VIII line being much broader than the «10 eV drop observed in the data. We conclude that soft X-ray accretion disc lines will, in general, be weak and broad features and are unlikely to produce sharp edges in the data." @default.
- W2007684380 created "2016-06-24" @default.
- W2007684380 creator A5024983697 @default.
- W2007684380 creator A5056843075 @default.
- W2007684380 creator A5074133520 @default.
- W2007684380 date "2002-11-01" @default.
- W2007684380 modified "2023-10-18" @default.
- W2007684380 title "Soft X-ray emission lines from photoionized accretion discs: constraints on their strength and width" @default.
- W2007684380 cites W1567379595 @default.
- W2007684380 cites W1844333606 @default.
- W2007684380 cites W1971519887 @default.
- W2007684380 cites W1982205612 @default.
- W2007684380 cites W1987451417 @default.
- W2007684380 cites W2017396100 @default.
- W2007684380 cites W2017772783 @default.
- W2007684380 cites W2023755959 @default.
- W2007684380 cites W2035670220 @default.
- W2007684380 cites W2037978621 @default.
- W2007684380 cites W2043384049 @default.
- W2007684380 cites W2047918491 @default.
- W2007684380 cites W2051490449 @default.
- W2007684380 cites W2076672907 @default.
- W2007684380 cites W2081293134 @default.
- W2007684380 cites W2083123053 @default.
- W2007684380 cites W2088772258 @default.
- W2007684380 cites W2135635659 @default.
- W2007684380 cites W2269481227 @default.
- W2007684380 cites W3098097999 @default.
- W2007684380 cites W3099357603 @default.
- W2007684380 cites W3102529193 @default.
- W2007684380 cites W3103637722 @default.
- W2007684380 doi "https://doi.org/10.1046/j.1365-8711.2002.05818.x" @default.
- W2007684380 hasPublicationYear "2002" @default.
- W2007684380 type Work @default.
- W2007684380 sameAs 2007684380 @default.
- W2007684380 citedByCount "38" @default.
- W2007684380 countsByYear W20076843802012 @default.
- W2007684380 countsByYear W20076843802019 @default.
- W2007684380 countsByYear W20076843802020 @default.
- W2007684380 countsByYear W20076843802021 @default.
- W2007684380 crossrefType "journal-article" @default.
- W2007684380 hasAuthorship W2007684380A5024983697 @default.
- W2007684380 hasAuthorship W2007684380A5056843075 @default.
- W2007684380 hasAuthorship W2007684380A5074133520 @default.
- W2007684380 hasBestOaLocation W20076843801 @default.
- W2007684380 hasConcept C121332964 @default.
- W2007684380 hasConcept C1276947 @default.
- W2007684380 hasConcept C169791425 @default.
- W2007684380 hasConcept C195803813 @default.
- W2007684380 hasConcept C2776401274 @default.
- W2007684380 hasConcept C44870925 @default.
- W2007684380 hasConcept C4839761 @default.
- W2007684380 hasConcept C96141758 @default.
- W2007684380 hasConceptScore W2007684380C121332964 @default.
- W2007684380 hasConceptScore W2007684380C1276947 @default.
- W2007684380 hasConceptScore W2007684380C169791425 @default.
- W2007684380 hasConceptScore W2007684380C195803813 @default.
- W2007684380 hasConceptScore W2007684380C2776401274 @default.
- W2007684380 hasConceptScore W2007684380C44870925 @default.
- W2007684380 hasConceptScore W2007684380C4839761 @default.
- W2007684380 hasConceptScore W2007684380C96141758 @default.
- W2007684380 hasIssue "3" @default.
- W2007684380 hasLocation W20076843801 @default.
- W2007684380 hasLocation W20076843802 @default.
- W2007684380 hasOpenAccess W2007684380 @default.
- W2007684380 hasPrimaryLocation W20076843801 @default.
- W2007684380 hasRelatedWork W1570869982 @default.
- W2007684380 hasRelatedWork W2017899146 @default.
- W2007684380 hasRelatedWork W2091176966 @default.
- W2007684380 hasRelatedWork W2123997370 @default.
- W2007684380 hasRelatedWork W2131806557 @default.
- W2007684380 hasRelatedWork W2139437008 @default.
- W2007684380 hasRelatedWork W2160903695 @default.
- W2007684380 hasRelatedWork W2318455429 @default.
- W2007684380 hasRelatedWork W3104025681 @default.
- W2007684380 hasRelatedWork W3204427859 @default.
- W2007684380 hasVolume "336" @default.
- W2007684380 isParatext "false" @default.
- W2007684380 isRetracted "false" @default.
- W2007684380 magId "2007684380" @default.
- W2007684380 workType "article" @default.