Advertisement

The Explanation of the Positron-Electron Annihilation Line at Our Galactic Center under the Model of Galactic Nuclei with Monopoles

  • Deyu Wang
  • Qiuhe Peng
  • Zongyun Li
Part of the Astrophysics and Space Science Library book series (ASSL, volume 121)

Abstract

The observational data on the intense positron-electron annihilation line (AL) at our Galactic Center, detected by ballons (1) and satellites (2), may be summarised as follows: the energy of spectral line is 5109.9±0.25 keV with very small gravitational redshift (Z ⩽ 7 × 10-4); the intensity of spectral line is ∼ 6 × 1037 erg/sec, corresponding to annihilation of ∼ 1043 e+/sec; the width of spectral line is very small, FWMH ⩽ 3.2 keV (3); and the intensity of spectral line decreases about 1/3 during 6 Months (2). The higher energy photons (continuum) of Eγ ⩾ 511 keV are also detected; the integral intensity from Eγ = 500 keV – 10 MeV is (8 – 20) × 1037 erg/sec(4), corresponding to about 1/5 the photon number of AL.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. (1a).
    W. Johnson, and R. Haymes, Ap. J., 184 (1973) 103ADSCrossRefGoogle Scholar
  2. (1b).
    R. Haynes et al., Ap. J., 201 (1975)593ADSCrossRefGoogle Scholar
  3. (2).
    G. Riegler et al., Ap. J., 248 (1981) L13ADSCrossRefGoogle Scholar
  4. (3a).
    M. Leventhal, et al., Ap. J., 225 (1978) L11ADSCrossRefGoogle Scholar
  5. (3b).
    ibid 240 (1980) 333ADSCrossRefGoogle Scholar
  6. (3c).
    ibid 260 (1982) L1ADSCrossRefGoogle Scholar
  7. (4).
    J. Matteson, ‘The Galactic Center’, AIP Conf. Proc. No 83 (1982) (eds. G.R. Riegler and R.D. Blandford) p. 109–122CrossRefGoogle Scholar
  8. (5).
    Q. Peng et al., see this symposiumGoogle Scholar
  9. (6).
    J. Lacy et al., Ap. J., 241 (1980) 132ADSCrossRefGoogle Scholar
  10. (7a).
    G. Townes et al., Nature 301 (1983) 661ADSCrossRefGoogle Scholar
  11. (7b).
    Becklin et al., Ap. J., 258 (1982) 135ADSCrossRefGoogle Scholar
  12. (7c).
    I. Gattey, ‘The Galactic Center’ AIP. Conf. Proc. No 83(1982) p25–32CrossRefGoogle Scholar
  13. (8).
    F. Steckney, Cosmis Gamma Rays. (1971) NASA 59-249Google Scholar
  14. (9).
    W. Heitter, The Quantum theory of radiation (1954) §38 (Oxford University Press)Google Scholar
  15. (10).
    R. Drachman et al., Phys. Rev. A14 (1971)100ADSGoogle Scholar
  16. (11).
    R. Lingenfelter et al., ‘The Galactic Center’ AIP Conf. Proc. No 83 (1982) P. 148 – 159)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1986

Authors and Affiliations

  • Deyu Wang
    • 1
  • Qiuhe Peng
    • 2
    • 3
  • Zongyun Li
    • 2
  1. 1.Purple Mountain ObservatoryNanjingChina
  2. 2.Department of AstronomyNanjing UniversityNanjingChina
  3. 3.Kapteyn Astronomical LaboratoryGroningenNetherlands

Personalised recommendations