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Massive Neutrinos and Ultraviolet Astronomy

Published online by Cambridge University Press:  04 August 2017

D. W. Sciama
D. W. Sciama*
Affiliation:
International School for Advanced Studies, Trieste and Department of Astrophysics, Oxford University

Abstract

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Massive neutrinos (or photinos) dominating galactic halos may decay into less massive particles by emitting ultraviolet photons. The lifetime for this process can be calculated from particle physics in a model-dependent way. The observed ultraviolet background constrains this lifetime to exceed about 1024 seconds. If the photon energy exceeds 13.6 ev, the existence of HI structures from the galactic plane imposes a similar constraint. The existence of Si IV and C IV in the halos of our own and other galaxies could be due to ∼ 50 ev photons emitted by neutrinos or photinos of rest-mass ∼ 100 ev if their lifetime ∼ 1027 seconds. This lifetime could be in agreement with the theoretical value for 100 ev particles.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 104: Early Evolution of the Universe and Its Present Structure , 1983 , pp. 313 - 320
Copyright
Copyright © Reidel 1983 

References

Bahcall, J.N., Cabibbo, N., and Yahill, A. 1972, Phys. Rev. Lett., 28, 316.CrossRefGoogle Scholar
Bromage, G.E., Gabriel, A.H., and Sciama, D.W. 1980, Proc. 2nd European IUE Conf. Report No. ESA SP-157.Google Scholar
Cabibbo, N., Farrar, G.R., and Maiani, L. 1981, Phys. Lett., 105B, 155.CrossRefGoogle Scholar
Cowsik, R., and McClelland, J. 1972, Phys. Rev. Lett., 29, 669.Google Scholar
Deharveng, J.M., Joubert, M., and Berge, P. 1982, Astron. Astrophys., 109, 179.Google Scholar
de Rujula, A., and Glashow, S. 1980, Phys. Rev. Lett., 45, 942.CrossRefGoogle Scholar
Fayet, P., and Ferrara, S. 1977, Phys. Reports 32C, 249.Google Scholar
Feldman, P.D., Bruce, W.H., and Henry, R.C. 1981, Ap. J. Lett., 249, L51.Google Scholar
Gondhalekar, P. 1981, private communication.Google Scholar
Green, R.F., Pier, J.R., Schmidt, M., Estabrook, F.B., Lane, A.L., and Wahlquist, H.D. 1980, Ap. J., 239, 483.CrossRefGoogle Scholar
Gunn, J.E., and Peterson, B.A. 1965, Ap. J., 142, 1633.Google Scholar
Guth, A.H. 1982, Proc. Roy. Soc. A., to be published.Google Scholar
Hartquist, T.W. 1982, to be published.Google Scholar
Henry, R.C., and Feldman, P.D. 1981, Phys. Rev. Lett., 47, 618.CrossRefGoogle Scholar
Kimble, R., Bowyer, S., and Jakobsen, P. 1981, Phys. Rev. Lett., 46, 80.CrossRefGoogle Scholar
Melott, A.L., and Sciama, D.W. 1981, Phys. Rev. Lett., 46, 1369.CrossRefGoogle Scholar
Pakvase, S., and Tennakone, K. 1972, Phys. Rev. Lett., 28, 1415.CrossRefGoogle Scholar
Pal, P.B., and Wolfenstein, L. 1982, Phys. Rev. D, 25, 766.Google Scholar
Pettini, M., and West, K.A. 1982, Ap. J., 260, 561.CrossRefGoogle Scholar
Rephaeli, Y., and Szalay, A.S. 1981, Phys. Lett., 106B, 73.CrossRefGoogle Scholar
Savage, B.D., and de Boer, K. 1979, Ap. J. Lett., 230, L77.Google Scholar
Savage, B.D., and de Boer, K. 1981, Ap. J., 243, 460.Google Scholar
Schramm, D.N. 1982, Proc. Roy. Soc. A., to be published.Google Scholar
Sciama, D.W. 1982a, Mon. Not. Roy. Astr. Soc., 198, 1P.Google Scholar
Sciama, D.W. 1982b, Phys. Lett., 112B, 211.Google Scholar
Sciama, D.W. 1982c, Phys. Lett., 114B, 19.Google Scholar
Sciama, D.W., and Melott, A.L. 1982, Phys. Rev. D, 25, 2214.CrossRefGoogle Scholar
Sherman, R.D. 1981, Ap. J., 246, 365.CrossRefGoogle Scholar
Shipman, H. L., and Cowsik, R. 1981, Ap. J. Lett., 247, L111.Google Scholar
Stecker, F.W. 1980, Phys. Rev. Lett., 45, 1460.CrossRefGoogle Scholar
Stecker, F.W., and Brown, R.W. 1982, Ap. J., 257, 1.Google Scholar
Tennakone, K., and Pakvase, S. 1971, Phys. Rev. Lett., 27, 757.Google Scholar
Tremaine, S., and Gunn, J.E. 1979, Phys. Rev. Lett., 42, 407.Google Scholar
Ulrich, M.H., et al. 1980, Mon. Not. Roy. Astr. Soc., 1982, 561.Google Scholar
Wampler, E.J., Robinson, L.B., Baldwin, J.A., and Burbidge, E.M. 1973, Nature, 243, 336.Google Scholar
Weymann, R.J., Carswell, R.F., and Smith, M.G. 1981, Ann. Rev. Astron. Astrophys., 19, 41.Google Scholar
Young, P., Sargent, W.L.W., and Bokensberg, A. 1982, Ap. J. Suppl., 48, 455.Google Scholar