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Annihilation Radiation and Gamma-Ray Continuum from the Galactic Center Region

Published online by Cambridge University Press:  23 September 2016

Richard E. Lingenfelter  and
Reuven Ramaty
Richard E. Lingenfelter
Affiliation:
Center for Astrophysics and Space Sciences University of California, San Diego La Jolla, CA 92093 U. S. A.
Reuven Ramaty
Affiliation:
Laboratory for High Energy Astrophysics Goddard Space Flight Center Greenbelt, MD 20771 U. S. A.

Abstract

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Observations of the time-dependent, electron-positron annihilation line radiation and gamma-ray continuum emission from the region of the Galactic Center show that there are two components to the annihilation line emission: a variable, compact source at or near the Galactic Center, and a steady, diffuse interstellar distribution. We suggest that the annihilating positrons in the compact source, observed from 1977 through 1979, result from photon-photon pair production, most likely around an accreting black hole, and that the annihilating, interstellar positrons result from the decay of radionuclei produced by thermonuclear burning in supernovae.

Type
The High - Energy View
Information
Symposium - International Astronomical Union , Volume 136: The Galactic Center , 1989 , pp. 587 - 605
Copyright
Copyright © Kluwer 1989 

References

Albernhe, F., et al. 1981, Astron. Astrophys. , 94, 214.Google Scholar
Blandford, R. D. 1979, in Active Galactic Nuclei , (London: Cambridge Univ.) p. 241.Google Scholar
Blandford, R. D. 1982, in The Galactic Center , ed. Riegler, G. R. and Blandford, R. D. (New York: Am. Inst. Phys.) p. 177.Google Scholar
Brown, B. L., and Leventhal, M. 1987, Astrophys. J. , 319, 637.CrossRefGoogle Scholar
Brown, B. L., Leventhal, M., and Mills, A. P. Jr. 1986, Phys. Rev. , A33, 2281.CrossRefGoogle Scholar
Burns, M. L. 1983, in Positron-Electron Pairs in Astrophysics , ed. Burns, M. L., Harding, A. K., and Ramaty, R., (New York, Am. Inst. Phys.) p. 281.Google Scholar
Bussard, R. W., Ramaty, R., and Drachman, R. J. 1979, Astrophys. J. , 228, 928.CrossRefGoogle Scholar
Cameron, A. G. W. 1982, in Essays in Nuclear Astrophysics , ed. Barnes, C. A., Clayton, D. D., and Schramm, D. N. (Cambridge: Cambridge Univ.) p. 23.Google Scholar
Carrigan, B. J., and Katz, J. I. 1987, Astrophys. J. , 323, 557.CrossRefGoogle Scholar
Clayton, D. D. 1973, Nature Phys. Sci. , 244, 137.CrossRefGoogle Scholar
Colgate, S. A. 1970, Astrophys. Space Sci. , 8, 457.CrossRefGoogle Scholar
Cook, W. R., et al., (This volume).Google Scholar
Crannell, C. J., et al. 1976, Astrophys. J. , 210, 582.CrossRefGoogle Scholar
Dunphy, P. P., Chupp, E. L., and Forrest, D. J. 1983, in Positron-Electron Pairs in Astrophysics , ed. Burns, M. L., Harding, A. K., and Ramaty, R., (New York, Am. Inst. Phys.) p. 237.Google Scholar
Eardley, D. M., et al. 1978, Astrophys. J. , 224, 53.CrossRefGoogle Scholar
Gardner, B. M., et al. 1982, in The Galactic Center , ed. Riegler, G. R. and Blandford, R. D. (New York: Am. Inst. Phys.) p. 144.Google Scholar
Harding, A. K., and Stecker, F. W. 1981, Nature , 290, 316.CrossRefGoogle Scholar
Haymes, R. C., et al., 1975, Astrophys. J. , 201, 593.CrossRefGoogle Scholar
Higdon, J. C., and Fowler, W. A. 1987, Astrophys. J. , 317, 710.CrossRefGoogle Scholar
Johnson, W. N., Harnden, F. R., and Haymes, R. C. 1972, Astrophys. J. , 172, L1.CrossRefGoogle Scholar
Johnson, W. N., and Haymes, R. C. 1973, Astrophys. J. , 184, 103.CrossRefGoogle Scholar
Kardeshev, N. S., et al. 1983, in Positron-Electron Pairs in Astrophysics , ed. Burns, M. L., Harding, A. K., and Ramaty, R., (New York, Am. Inst. Phys.) p. 253.Google Scholar
Knight, F. K., et al. 1985, 19th Internat. Cosmic Ray Conf. Papers , 1, 217.Google Scholar
Lacy, J. H., et al. 1980, Astrophys. J. , 241, 132.CrossRefGoogle Scholar
Leventhal, M. 1973, Astrophys. J. , 183, L147.CrossRefGoogle Scholar
Leventhal, M., et al. 1980, Astrophys. J. , 240, 338 CrossRefGoogle Scholar
Leventhal, M. 1982, Astrophys. J. , 260, L1.CrossRefGoogle Scholar
Leventhal, M. 1986, Astrophys. J. , 302, 459.CrossRefGoogle Scholar
Leventhal, M., MacCallum, C. J., and Stang, P. D. 1978, Astrophys. J. , 225, L11.CrossRefGoogle Scholar
Levine, A. M., et al. 1984, Astrophys. J. Supp. , 54, 581.CrossRefGoogle Scholar
Lingenfelter, R. E. 1988, 20th Internat. Cosmic Ray Conf. Papers , 8, 7.Google Scholar
Lingenfelter, R. E., and Hueter, G. J. 1984, in High Energy Transients in Astrophysics , ed. Woosley, S. E. (New York: Am. Inst. Phys.) p. 558.Google Scholar
Lingenfelter, R. E., and Ramaty, R., 1979, 16th Internat. Cosmic Ray Conf. Papers , 1, 501.Google Scholar
Lingenfelter, R. E., and Ramaty, R. 1982, in The Galactic Center , ed. Riegler, G. R. and Blandford, R. D. (New York: Am. Inst. Phys.) p. 148.Google Scholar
Lingenfelter, R. E., and Ramaty, R. 1983, in Positron-Electron Pairs in Astrophysics , ed. Burns, M. L., Harding, A. K., and Ramaty, R., (New York: Am. Inst. Phys.) p. 267.Google Scholar
Lingenfelter, R. E., and Ramaty, R. 1985, 19th Internat. Cosmic Ray Conf. Papers , 9, 19.Google Scholar
Lovelace, R. V. E., McAuslan, J., and Burns, M. L. 1979, in Particle Acceleration Mechanisms in Astrophysics , ed. Arons, J., Max, C. and McKee, C., (New York: Am. Inst. Phys.) p. 399.Google Scholar
Mahoney, W. A. 1988, in Nuclear Spectroscopy of Astrophysical Sources , ed. Gehrels, N. and Share, G. H., (New York: Am. Inst. Phys.) p. 149.Google Scholar
Mahoney, W. A., et al. 1982, Astrophys. J. , 262, 742.CrossRefGoogle Scholar
Mahoney, W. A. 1984, Astrophys. J. , 286, 578.CrossRefGoogle Scholar
Matteson, J. L. 1982, in The Galactic Center , ed. Riegler, G. R. and Blandford, R. D. (New York: Am. Inst. Phys.) p. 109.Google Scholar
Mayer-Hasselwander, H. A., et al. 1980, Ann. N. Y. Acad. Sci. , 336, 211.CrossRefGoogle Scholar
McKinley, J. M. 1986, Proc. Third Internat. Workshop on Positron Gas Scattering , (Singapore: World Scientific), p. 152.Google Scholar
Ozernoy, L. M. 1979, in The Large-Scale Characteristics of the Galaxy , ed. Burton, W. B., (Dordrecht: Reidel) p. 395.CrossRefGoogle Scholar
Paciesas, W. S., et al. 1982, Astrophys. J. , 260, L7.CrossRefGoogle Scholar
Ramaty, R., and Lingenfelter, R. E., 1977, Astrophys. J. , 213, L5.CrossRefGoogle Scholar
Ramaty, R., and Lingenfelter, R. E. 1979, Nature , 278, 127.CrossRefGoogle Scholar
Ramaty, R., and Lingenfelter, R. E. 1981, Phil. Trans. Roy. Soc. London, A 301, 671.Google Scholar
Ramaty, R., and Lingenfelter, R. E. 1982, Ann. Rev. Nucl. Part. Sci. , 32, 235.CrossRefGoogle Scholar
Ramaty, R., and Lingenfelter, R. E. 1987, in The Galactic Center , ed. Backer, D. (New York: Am. Inst. Phys.) p. 51.Google Scholar
Riegler, G. R., et al. 1981, Astrophys. J. , 248, L13.CrossRefGoogle Scholar
Riegler, G. R. et al. 1985, Astrophys. J. , 294, L13.CrossRefGoogle Scholar
Schoenfelder, V., von Ballmoos, P., and Diehl, R. 1987, 20th Internat. Cosmic Ray Conf. Papers , 1, 109.Google Scholar
Share, G. H., et al. 1985, Astrophys. J. , 294, L61.CrossRefGoogle Scholar
Share, G. H., et al. 1988, Astrophys. J. , 326, 717.CrossRefGoogle Scholar
Skinner, G. K., et al. 1987, Nature , 330, 544.CrossRefGoogle Scholar
Sturrock, P. A. 1971, Astrophys. J. , 164, 529.CrossRefGoogle Scholar
Swanenburg, B. N., et al. 1981, Astrophys. J. , 243, L69.CrossRefGoogle Scholar
Weber, W. R., et al. 1986, Nature , 323, 692.CrossRefGoogle Scholar
Woosley, S. E. 1987, private communication.Google Scholar
Zurek, W. H. 1985, Astrophys. J. , 289, 603.CrossRefGoogle Scholar