Gamma-Rays from Accretion Processes and Relativistic Beams

  • F. Giovannelli
  • W. Bednarek
  • S. Karakula
  • W. Tkaczyk
Part of the NATO ASI Series book series (ASIC, volume 305)

Abstract

In this paper we review our recent works in studying the production of γ-rays from collapsed objects. The main discussed process is always the π°-decay. We simply changed the geometry of the sources, starting from the spherical symmetry to a strong anisotropy like in the beamed sources. Firstly we starded the calculations for the processes producing γ-rays via π°-decay in the spherical accretion of matter onto collapsed objects and then we moved in studying the interactions of a monoenergetic, one dimensional beam, with a Lorentz factor γ and velocity of the beam β, with the surroimding matter and radiation.

In the spherical accretion onto massive objects, the matter may be heated up to temperature as high as 10**12 K. In such a relativistic plasma, inelastic collision of protons may produce π°which are the γ-ray source. We determined the γ- ray energy production spectra in the como-ving plasma system for different temperature and expected γ- ray energy spectra for the case of spherically symmetric accretion of matter onto a black hole. The predictions of the model gauged to the quasar 3C 273 are presented. The photon-photon interaction has been taken into account. From the best fit, a dimension of the X-ray source of few times 10**17 cm is derived.

The photon energy spectra from the electron-proton (e-p) beam interactions with the matter and radiation were calculated. We obtained the photon energy spectra from Inverse Compton Scattering (ICS) of an arbitrary background radiation by relativistic electron-beams and photon energy spectra from p + p interactions via π°-decay for relativistic proton-beams. The results for selected beam Lorentz factors and selected angles between the emitted photon direction and the beam axis are presented. The calculated theoretical spectra from ICS of the background photons by relativistic electrons and from the interaction of beamed relativistic particles with the surrounding matter have been succesfully used to fit the spectrum of Cyg X-1, in the energy range greater than 1 MeV, and that of Geminga in the COS B energy range, respectively.

Keywords

Black Hole Lorentz Factor Photon Spectrum Background Photon Inverse Compton Scattering 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Barashenkov, W.S. and Tonev, W.D. (1972), Wzaimodejstvija wysokoenergeticheskih chastic i atomnyh jader s jadrami, Moscow.Google Scholar
  2. Barashenkov, W.S. and Tonev, W.D. (1972), Wzaimodejstvija wysokoenergeticheskih chastic i atomnyh jader s jadrami, Moscow.Google Scholar
  3. Barashenkov, W.S. and Tonev, W.D. (1972), Wzaimodejstvija wysokoenergeticheskih chastic i atomnyh jader s jadrami, Moscow.Google Scholar
  4. Begelman, M.C. and Sikora, M. (1987), Astrophys. J. 322, 650.ADSCrossRefGoogle Scholar
  5. Bezler, M., Kendziorra, E., Staubert, R., Hasinger, G., Pietsch, W., Reppin, C., Trumper, J., and Voges, W. (1984), Astron. Astrophys. 136, 351.ADSGoogle Scholar
  6. Bignami, G.F., Bennet, K., Buccheri, R., Caraveo, P.A., Hermsen, W., Kanbach, G., Lichti, G.G., Masnou, J.L., Mayer-hasselwander, H.A., Paul, J.A., Sacco, B., Scarsi, L., Swanenburg, B.N., and Wills, R.D. (1981), Astron. Astrophys. 93, 71.ADSGoogle Scholar
  7. Bignami, G.F., Caraveo, P.A., and Lamb, R.C. (1983), Astrophys. J. Letters 272, L9.ADSCrossRefGoogle Scholar
  8. Bignami, G.F. and Hermsen, W. (1983), Ann. Rev. Astron. Astrophys. 21, 67.ADSCrossRefGoogle Scholar
  9. Blumental, R.G. and Gould, R.J. (1970), Rev. Mod. Phys. 42, 237.ADSCrossRefGoogle Scholar
  10. Bridle, A.H. and Perley, R.A. (1984) Ann. Rev. Astron. Astrophys. 22, 319.ADSCrossRefGoogle Scholar
  11. Canfield, E., Howard, W.M., and Liang, E.P. (1987), Astrophys. J. 323, 565.ADSCrossRefGoogle Scholar
  12. Cohen, M.H. and Urwin, S.C. (1984), in VLBI and Compact Radio Sources, (eds. R. Fanti, K. Kellerman, and G. Setti ), Dordrecht: Reidel, lAU Symp. No. 110, p. 95.Google Scholar
  13. Elvis, M., Feigelson, E., Griffiths, R.E., Henry, J.P., and Tananbaum, H. (1980), in High-lights of Astronomy, (ed. H. van der Laan).Google Scholar
  14. Frank, J., King, A.R., and Raine, D.J. (1985), in Accreting Power in Astrophysics, Cambridge University Press, U.K.Google Scholar
  15. Giovannelli, F., Karakula, S., and Tkaczyk, W. (1982a), Astron. Astrophys. 107, 376.ADSGoogle Scholar
  16. Giovannelli, F., Karakula, S., and Tkaczyk, W. (1982b), Acta Astron. 32, 121.ADSGoogle Scholar
  17. Gorecki, A. and Kluzniak, W. (1981), Acta Astron. 31, 457.ADSGoogle Scholar
  18. Gould, R.J. (1980), Astrophys. J. 238, 1026.ADSCrossRefGoogle Scholar
  19. Gould, R.J. (1981), Astrophys. J. 243, 677.ADSCrossRefGoogle Scholar
  20. Halpern, J.P. and Tytler, D. (1988), Astrophys. J. 330, 201.ADSCrossRefGoogle Scholar
  21. Karakula, S., Tkaczyk, W., and Giovannelli, F. (1984), Adv. Space Res. Vol. 3, No. 10–12, p. 335.ADSCrossRefGoogle Scholar
  22. Kolykhalov, P.I. and Sunyaev, R.A. (1979), Soviet Astron. 23, 183.ADSGoogle Scholar
  23. Liang, E.P. and Nolan, P.L. (1984), Space Sci. Rev. 38, 353.ADSCrossRefGoogle Scholar
  24. Masnou, J.L., Bennett, K., Bignami, G.F., Bloemen, J.B.G.M., Buccheri, R., Caraveo, P.A., Hermsen, W., Kanbach, G., Mayer-Hasselwander, H.A., Paul, J.A., and Wills, R.D. (1981), Proc. 17th Int. Cosmic Ray Conf. (Paris) 1, 177.Google Scholar
  25. McConnell, M.L., Owens, A., Chupp, E.L., Dunphy, P.P., Forrest, D.J., and Vestrand, W.T. (1987), Proc. 20th Int. Cosmic Ray Conf. (Moscow) 1, 58.Google Scholar
  26. Michel, F.G. (1972), Astrophys. Space Sci. 15, 153.ADSCrossRefGoogle Scholar
  27. Moffat, A.F.J., Schlickeiser, R., Shara, M.M., Sieber, W., Tuffs, R., and Kuhr, M. (1983), Astrophys. J. Letters 271, L45.ADSCrossRefGoogle Scholar
  28. Ninkov, Z., Walker, G.A.H., and Yang, S. (1987a), Astrophys. J. 321, 425.ADSCrossRefGoogle Scholar
  29. Ninkov, Z., Walker, G.A.H., and Yang, S. (1987b), Astrophys. J. 321, 438.ADSCrossRefGoogle Scholar
  30. Oda, M. (1977), Space Sci. Rev. 20, 757.ADSCrossRefGoogle Scholar
  31. Pietsch, W., Reppin, C., Trximper, J., Voges, W., Lewin, W., Kendziorra, E., and Staubert, R. (1981), Astron. Astrophys. 94, 234.ADSGoogle Scholar
  32. Pollock, A.M.T., Bignami, G.F., Hermsen, W., Kanbach, G., Lichti, G.G., Masnou, J.L., Swanenburg, B.N., and Wills, R.D. (1981), Astron. Astrophys. 94, 116.ADSGoogle Scholar
  33. Porcas, R.W. (1985), in Active Galactic Nuclei, (ed. J.E. Dyson ), Manchester University Press, U.K., p. 20.Google Scholar
  34. Primini, F.A., Cooke, B.A., Dobson, C.A., Howe, S.K., Scheepmaker, A., Wheaton, W.A., and Lewin, W.H.G. (1979), Nature 278, 234.ADSCrossRefGoogle Scholar
  35. Protheroe, R.J. and Kazanas, D. (1983), Astrophys. J. 265, 620.ADSCrossRefGoogle Scholar
  36. Rees, M. (1985), Proc. 19th Int. Cosmic Ray Conf. (La Jolla), 9, 1.Google Scholar
  37. Reynolds, S.P. (1982), Astrophys. J. 256, 38.ADSCrossRefGoogle Scholar
  38. Stecker, F.W. (1971), in Cosmic Gamma Rays, Baltimore: Mono Book Corp., NASA SP-249.Google Scholar
  39. Sunyaev, R.A. and Titarchuk, L.G. (1980), Astron. Astrophys. 86, 121.ADSGoogle Scholar
  40. Swanenburg, B.N., Bennet, K., Bignami, G.F., Buccheri, R., Caraveo, P., Hermsen, W., Kanbach, G., Lichti, G.G., Masnou, J.L., Mayer-Hasselwander, H.A., Paul, J.A., Sacco, B., Scarsi, L., and Wills, R.D. (1981), Astrophys. J. Letters 243, L69.ADSCrossRefGoogle Scholar
  41. Tkaczyk, W. (1978), Postepy Astronomii Tom XXVI, Zeszyt 2.Google Scholar
  42. Ulrich, M.H. (1981), Space Sci. Rev. 28, 89.ADSCrossRefGoogle Scholar
  43. White, G.L. and Ricketts, M.J. (1979), Mon. Not. R. astr. Soc. 187, 757.ADSGoogle Scholar
  44. Woodsworth, A.W., Higgs, L.A., and Gregory, P.C. (1980), Astron. Astrophys. 84, 379.ADSGoogle Scholar
  45. Worral, D.M., Mushotzky, R.F., Boldt, E.A., Holt, S.S., and Serlemitsos, P.J. (1979), Astrophys. J. 232, 683.ADSCrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • F. Giovannelli
    • 1
  • W. Bednarek
    • 2
  • S. Karakula
    • 2
  • W. Tkaczyk
    • 2
  1. 1.Istituto di Astrofisica Spaziale, CNRFrascatiItaly
  2. 2.Institute of PhysicsUniversity of LodzLodzPoland

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