Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-05T10:00:45.379Z Has data issue: false hasContentIssue false

The e+–e Annihilation Line and the Cosmic X-Ray Background

Published online by Cambridge University Press:  04 August 2017

Demosthenes Kazanas
Affiliation:
NASA/Goddard Space Flight Center, Code 665, Greenbelt, MD. 20771 and University of Maryland
Richard A. Shafer
Affiliation:
NASA/Goddard Space Flight Center, Code 665, Greenbelt, MD. 20771 and University of Maryland

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The possibility that the processes responsible for the Cosmic X-ray Background (CXB) would also produce an e-e+ annihilation feature is examined. Under the assumption that these processes are thermal, the absence of a strong e-e+ annihilation feature places constraints on the compactness (L/R ratio) of these sources. Observations favor sources of small compactness ratio.

Type
Research Article
Copyright
Copyright © Reidel 1983 

References

Cowsik, R. and Kobetich, E. J., 1972, Ap. J., 177, 585.Google Scholar
Dezotti, G., 1982, Astron. and Astrophys. Google Scholar
Field, G. B. and Perrenod, S., 1977, Ap. J., 215, 717.Google Scholar
Giacconi, R., Gursky, J., Paolini, F. and Rossi, B., 1962, Phys. Rev. Lett., 9, 439.Google Scholar
Lightman, A. D. and Band, D. L., 1981, Ap. J., 251, 715.Google Scholar
Lightman, A. D., 1982, Ap. J., 253, 842.Google Scholar
Marshall, F., Boldt, E., Holt, S., Miller, R., Mushotzky, R., Rose, L. A., Rothchild, R. and Serlemitsos, P., 1980, Ap. J., 235, 377.Google Scholar
Ramaty, R. and Meszaros, P., 1981, Ap. J., 250, 384.Google Scholar
Ramaty, R. and Lingenfelter, R. E., 1982, Annual Reviews of Nuclear and Particle Science.Google Scholar
Weaver, T. A., 1976, Phys. Rev. A, 13, 1536.Google Scholar