Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.194..161b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 194, Jan. 1981, p. 161-167. Research supported by the University Grants
Astronomy and Astrophysics
Astronomy
2
Charged Particles, Frequency Shift, Spectral Energy Distribution, Stellar Radiation, White Holes (Astronomy), Doppler Effect, Energy Spectra, Gravitational Effects, Mathematical Models, Monochromatic Radiation, Reissner-Nordstrom Solution, Stellar Luminosity
Scientific paper
The spectral distribution of the radiation emitted from a white hole represented as a charged fluid sphere expanding from within its event horizon is considered. The results of the calculations of Banerjee and Dutta Choudhury (1977) of the frequency shift of light emitted from the surface of a white hole in terms of the matching conditions on the boundary of a charged fluid sphere with the Reissner-Nordstrom solution for the exterior line element are summarized, and it is shown that the time interval in comoving coordinates is not equal to the proper time on the boundary, as assumed by Narlikar and Apparao (1975) and Narlikar et al. (1974). The spectral energy distribution of the radiation emitted from a charged white hole is then analyzed on the basis of a spherically symmetric solution of the Einstein-Maxwell equations. A radiation intensity proportional to the inverse cube root of the energy is obtained for the case of monochromatic radiation, while in the case of a white hole with a constant luminosity spectrum a blueshift decreasing in magnitude throughout the expansion is found.
Banerji Sudhansukumar
Mondal D. R.
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