Research Papers (JVN)
Permanent URI for this collectionhttp://localhost:4000/handle/11007/400
Browse
Item Anomalous redshifts of QSOs(Reidel, 1980-01-01) Narlikar, J. V.; Das, P. K.Item Anomalous redshifts of quasi-stellar objects(American Astronomical Society, 1980-09-01) Narlikar, J. V.; Das, P. K.This paper is based on the assumption that the observational evidence to date does point to the possibility that high-redshift quasars are physically associated with low-redshift galaxies. It is first argued that the excess (or anomalous) redshifts of the quasars in such associations are unlikely to be either of Doppler or of gravitational origin. A new source for this excess redshift was suggested by Narlikar on the basis of the Hoyle-Narlikar theory of gravitation which is based on Mach's principle. This idea is applied to the hypothesis that quasars may have been ejected from galactic nuclei. The dynamics of such an ejection and its observable consequences are discussed. In particular, it is shown that quasar alignments and redshift bunching which have been observed recently can be understood within the framework of this theory. Further tests of this hypothesis are discussed.Item Central gravitational redshifts from static massive objects(Wiley-Blackwell, 1975-01-01) Das, P. K.; Narlikar, J. V.The possibility of obtaining high gravitational redshifts from static massive objects is investigated in an attempt towards finding a satisfactory explanation of the redshifts of the QSOs. Following Bondi's approach, equilibrium configurations of the core and envelope type are discussed within the framework of general relativity. Gravitational redshifts from the center of the core, from the core-envelope boundary, and from the surface of the object are calculated in a variety of cases, and their dependence on the equation of state is studied. In a possible application of these models to QSOs, the emission is considered to arise from an optically thin central region surrounded by an exterior which lets through a fraction of the emitted light. The mass of such an object can be estimated from the emission line data, as discussed with the example of 3C9.Item Central redshifts from static massive spheres(Astronomical Society of India, 1974-03-13) Das, P. K.; Narlikar, J. V.Item On the maximization of the central gravitational redshift of a Schwarzschild sphere with a given surface redshift(Springer, 1976-01-11) Narlikar, J. V.; Das, P. K.Item QSO redshifts and the steady state cosmology(Nature Publishing Group, 1975-12-25) Narlikar, J. V.; Das, P. K.