Compton backscattered 511 keV annihilation line emission and the 170 keV line from the Galactic center direction Export

@article{citeulike:4094069, abstract = {It is shown that Compton scattering of 511 keV electron-positron annihilation radiation produces a linelike reflection feature at 170 keV from backscattered photons. Assuming simple models of clouds and accretion disks around a compact source, the paper explores the spectrum of Compton-scattered annihilation line emission for a range of geometries, opacities, and observing angles, and finds that the linelike feature is produced under a wide variety of conditions. It is further shown that such Compton backscattering of slightly redshifted annihilation line emission from the inner edge of an accretion disk could account for the 170 keV line emission and higher energy continuum observed together with the 511 keV annihilation radiation from the direction of the Galactic center. Identification of the observed 170 keV line as a slightly redshifted annihilation line reflection feature provides strong new evidence that the source of this emission is a compact object surrounded by a disk of presumably accreting matter.}, author = {Lingenfelter, R. E. and Hua, X. M.}, citeulike-article-id = {4094069}, citeulike-linkout-0 = {http://dx.doi.org/10.1086/170665}, citeulike-linkout-1 = {http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1991ApJ...381..426L}, doi = {10.1086/170665}, journal = {Astrophys. J.}, keywords = {bibtex, theory, uncited}, month = {November}, pages = {426--438}, posted-at = {2009-02-24 14:14:47}, priority = {2}, title = {Compton backscattered 511 keV annihilation line emission and the 170 keV line from the Galactic center direction}, url = {http://dx.doi.org/10.1086/170665}, volume = {381}, year = {1991} }

TY - JOUR ID - citeulike:4094069 L3 - citeulike-article-id:4094069 N2 - It is shown that Compton scattering of 511 keV electron-positron annihilation radiation produces a linelike reflection feature at 170 keV from backscattered photons. Assuming simple models of clouds and accretion disks around a compact source, the paper explores the spectrum of Compton-scattered annihilation line emission for a range of geometries, opacities, and observing angles, and finds that the linelike feature is produced under a wide variety of conditions. It is further shown that such Compton backscattering of slightly redshifted annihilation line emission from the inner edge of an accretion disk could account for the 170 keV line emission and higher energy continuum observed together with the 511 keV annihilation radiation from the direction of the Galactic center. Identification of the observed 170 keV line as a slightly redshifted annihilation line reflection feature provides strong new evidence that the source of this emission is a compact object surrounded by a disk of presumably accreting matter. JF - Astrophys. J. EP - 438 TI - Compton backscattered 511 keV annihilation line emission and the 170 keV line from the Galactic center direction VL - 381 SP - 426 KW - bibtex KW - theory KW - uncited AU - Lingenfelter, RE AU - Hua, XM PY - 1991/November// UR - http://dx.doi.org/10.1086/170665 ER -