English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Compton scattering by a locally plane parallel atmosphere is analyzed withinthe Kompaneets approximation. In contrast to almost all previous analyticcalculations of inverse Compton scattering, we assume neither homogeneity norisotropy of the photon distribution. However, we do adopt an assumed angulardistribution of the photons. For any specified energy dependence of the fluxentering the base of the atmosphere, an analytic expression is obtained for theflux at any optical depth. Only integrals over the input flux are involved. Ifthe thickness of the atmosphere is much less than its radial position on anaccretion disk, the contribution from all radii may be summed. The initialmotivation (addressed in a subsequent paper) is the computation of the energyspectrum of (possibly modulated) photons originating from a specified radialregion of an accretion disk, relative to the total energy spectrum.Comment: Accepted for publication by The Astrophysical Journal. 15 pages, no  figure

An Analytic Approximation for Plane‐parallel Compton Scattering near Accretion Disks