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Compton backscattered annihilation line emission: a new diagnostic of accreting compact sources
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hua, Xin-Min Lingenfelter, Richard E. |
| Copyright Year | 1992 |
| Description | It is shown that Compton scattering of 511 keV electron-positron annihilation radiation produces a line like feature at approx. 170 keV from backscattered photons. Assuming a simple model of an accretion disk around a compact source, the spectrum is explored of the spectrum of Compton scattered annihilation line emission for a range of conditions. It is further shown that such Compton baskscattering of annihilation line emission from the inner edge of an accretion disk could account for the previously unidentified 170 keV line emission and high energy continuum observed from a variable, compact source, or sources, of annihilation radiation near the Galactic Center. Identification of the observed 170 keV line as an annihilation line reflection feature provides strong new evidence that the source of the emission is an accreting compact object. Further study of these features in existing spectra and in forthcoming GRO observation of these and other sources can provide unique new diagnostics of the innermost regions of accretion disks around compact objects. |
| File Size | 586984 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920012655 |
| Archival Resource Key | ark:/13960/t3vt6jz8z |
| Language | English |
| Publisher Date | 1992-02-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Stellar Spectra Electron Scattering Emission Spectra Backscattering Gamma Ray Observatory Continuums Photons Positron Annihilation Line Spectra Compton Effect Accretion Disks Gamma Ray Astronomy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
