Matches in SemOpenAlex for { <https://semopenalex.org/work/W4366341755> ?p ?o ?g. }
Showing items 1 to 69 of
69
with 100 items per page.
- W4366341755 abstract "The soft X-ray excess in the spectra of active galactic nuclei is characterized by similar electron temperatures of 0.1 -- 0.3 keV and similar photon indices around 2.2 -- 3, if fitted with inverse Comptonization. It remains a puzzle why both values are not sensitive to the black hole mass nor accretion rate. Supposing that the scattering-dominated surface layer of an accretion disk can act as a warm corona, we construct a vertically one-zone model to understand what determines its temperature By solving the equations of (1) the condition for the effective optical depth, (2) the energy balance, and (3) dominance of the Compton cooling over the bound-free cooling, we could reproduce the basic observational features of the soft excess, provided that anomalous heating (excess heating other than what is expected by local energy dissipation) takes place in the warm corona. The similar temperatures can be understood, since both of the anomalous heating and Compton cooling rates are proportional to the dissipation rate of the accretion energy, while similar photon indices are a natural consequence of the fact that observed photons are finally emitted from the layer of Compton $ysim 1$. The soft excess is not observed in black hole binaries, since disk temperatures are too high for the Compton scattering to work as cooling. The derived temperatures are somewhat underestimation, however. This may indicate a necessity of multi-zone corona structure. The stability of the warm corona and its consequences are briefly discussed." @default.
- W4366341755 created "2023-04-20" @default.
- W4366341755 creator A5044763045 @default.
- W4366341755 creator A5065924638 @default.
- W4366341755 date "2023-04-14" @default.
- W4366341755 modified "2023-09-28" @default.
- W4366341755 title "Model of a `Warm Corona' as the Origin of the Soft X-ray Excess of Active Galactic Nuclei" @default.
- W4366341755 doi "https://doi.org/10.48550/arxiv.2304.07463" @default.
- W4366341755 hasPublicationYear "2023" @default.
- W4366341755 type Work @default.
- W4366341755 citedByCount "0" @default.
- W4366341755 crossrefType "posted-content" @default.
- W4366341755 hasAuthorship W4366341755A5044763045 @default.
- W4366341755 hasAuthorship W4366341755A5065924638 @default.
- W4366341755 hasBestOaLocation W43663417551 @default.
- W4366341755 hasConcept C120665830 @default.
- W4366341755 hasConcept C121332964 @default.
- W4366341755 hasConcept C135402231 @default.
- W4366341755 hasConcept C147120987 @default.
- W4366341755 hasConcept C15908118 @default.
- W4366341755 hasConcept C159317903 @default.
- W4366341755 hasConcept C185544564 @default.
- W4366341755 hasConcept C191486275 @default.
- W4366341755 hasConcept C2776401274 @default.
- W4366341755 hasConcept C2776779350 @default.
- W4366341755 hasConcept C2779248092 @default.
- W4366341755 hasConcept C2779900269 @default.
- W4366341755 hasConcept C43481613 @default.
- W4366341755 hasConcept C44870925 @default.
- W4366341755 hasConcept C61203554 @default.
- W4366341755 hasConcept C81302155 @default.
- W4366341755 hasConcept C87355193 @default.
- W4366341755 hasConcept C97355855 @default.
- W4366341755 hasConcept C98444146 @default.
- W4366341755 hasConceptScore W4366341755C120665830 @default.
- W4366341755 hasConceptScore W4366341755C121332964 @default.
- W4366341755 hasConceptScore W4366341755C135402231 @default.
- W4366341755 hasConceptScore W4366341755C147120987 @default.
- W4366341755 hasConceptScore W4366341755C15908118 @default.
- W4366341755 hasConceptScore W4366341755C159317903 @default.
- W4366341755 hasConceptScore W4366341755C185544564 @default.
- W4366341755 hasConceptScore W4366341755C191486275 @default.
- W4366341755 hasConceptScore W4366341755C2776401274 @default.
- W4366341755 hasConceptScore W4366341755C2776779350 @default.
- W4366341755 hasConceptScore W4366341755C2779248092 @default.
- W4366341755 hasConceptScore W4366341755C2779900269 @default.
- W4366341755 hasConceptScore W4366341755C43481613 @default.
- W4366341755 hasConceptScore W4366341755C44870925 @default.
- W4366341755 hasConceptScore W4366341755C61203554 @default.
- W4366341755 hasConceptScore W4366341755C81302155 @default.
- W4366341755 hasConceptScore W4366341755C87355193 @default.
- W4366341755 hasConceptScore W4366341755C97355855 @default.
- W4366341755 hasConceptScore W4366341755C98444146 @default.
- W4366341755 hasLocation W43663417551 @default.
- W4366341755 hasOpenAccess W4366341755 @default.
- W4366341755 hasPrimaryLocation W43663417551 @default.
- W4366341755 hasRelatedWork W2047505318 @default.
- W4366341755 hasRelatedWork W2051242690 @default.
- W4366341755 hasRelatedWork W2062027210 @default.
- W4366341755 hasRelatedWork W2075819010 @default.
- W4366341755 hasRelatedWork W2156126431 @default.
- W4366341755 hasRelatedWork W2464574710 @default.
- W4366341755 hasRelatedWork W3006978271 @default.
- W4366341755 hasRelatedWork W3099626866 @default.
- W4366341755 hasRelatedWork W4376272447 @default.
- W4366341755 hasRelatedWork W4386034165 @default.
- W4366341755 isParatext "false" @default.
- W4366341755 isRetracted "false" @default.
- W4366341755 workType "article" @default.