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Browsing IIAP Publications by Subject "Galactic Nuclei"

Now showing items 1-13 of 13

Anomalous redshifts of quasi-stellar objects

Narlikar, J. V; Das, P. K (American Astronomical Society, 1980-09)

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 ...
Dynamical friction and the escape of a compact supermassive object shot from the center of a galaxy

Kapoor, R. C (D. Reidel Publishing Company, 1985-12)

A numerical study has been made of the motion of a compact object consisting of a supermassive black hole with a dense cluster of stars around through a galaxy which has recoiled from the center of the latter as a result ...
Effect of dynamical friction on the escape of a supermassive black hole from a galaxy

Kapoor, R. C (D. Reidel Publishing Company, 1985-05)

We have used the impulsive approximation technique to numerically estimate the effect of dynamical friction on the motion of a supermassive black hole (mass 109 M ) through a galaxy (mass=1011 M ) which has recoiled from ...
Nuclear activity and supernova occurrence

Kochhar, R. K (Indian Academy of Sciences, 1985)

It is argued that the occurrence of nuclear activity and supernovae in E and S0 galaxies are correlated and a result of accretion of gas by the galaxy.
Nucleus of NGC 2903

Prabhu, T. P (D.Reidel Publishing Co.,, 1980-04)

The nucleus of NGC 2903 is identified on near infrared photographs. The energy distribution of this nucleus in the visual region of the spectrum is estimated from available observations. The continuum compares well with ...
On the correlation between supernova occurrence and nuclear activity in elliptical galaxies

Kochhar, R. K; Prabhu, T. P (D. Reidel Publishing Co., 1984-03)

It is shown that there is a correlation between the occurrence of supernovae and nuclear activity in elliptical galaxies. Both shun a canonical elliptical, and occur only in those ellipticals which accrete gas. It is also ...
On the hypothesis of ejection of supermassive black holes from centers of galaxies and its application to quasar-galaxy associations

Kapoor, R. C (D. Reidel Publishing Co., 1983-06)

It is argued that accreting supermassive black holes ejected from centers of galaxies are the likely models for the quasars observed in association with galaxies. Also pointed out are the implications of a recent suggestion ...
Possible effects of positronium negative ion on 0.511 MeV gamma-ray line in astrophysical sources

Sivaram, C; Krishan, V (Springer, 1982-07)

The astrophysical importance of the negative positronium ion, detected recently in the laboratory, has been pointed out. It is found that the presence of Ps(-) ions will contribute additionally to the width of the 0.511 ...
Radio observations of the S0 galaxy NGC 1218 (3C 78)

Saikia, D. J; Subrahmanya, C. R; Patnaik, A. R; Unger, S. W; Cornwell, T. J; Graham, D. A; Prabhu, T. P (Royal Astronomical Society, 1986-04)

The authors present VLA observations of the S0 galaxy NGC 1218 at λ20 and 6 cm with both the A and D arrays, at λ20 cm with the B array and at λ2 and 1.3 cm with the A array. They also present VLBI observations at λ6 cm ...
Reflection of radio radiation at ionization fronts in emission line regions and accretion disks of active galactic nuclei

Krishan, V (The Royal Swedish Academy of Sciences, 1994)

It is known that high frequency short duration electromagnetic pulses can be generated by reflection of low frequency radiation off relativistically moving ionization fronts. In addition, a part of the incident electromagnetic ...
Searching for IMBHs in globular clusters

Safonova, M (World Scientific and Engineering Academy and Society, 2010)

Globular clusters have been alternatively predicted to host intermediate-mass black holes (IMBFIs) or nearly impossible to form and retain them in their centres. Over the last decade enough theoretical and observational ...
Solar activity (Report on progress of astronomy)

Das, A. K (Royal Astronomical Society, 1951)
Some implications of escape of supermassive black holes from galactic nuclei due to plasmoid ejection

Kapoor, R. C (D. Reidel Publishing Co., 1983-09)

Shklovsky (1982) has hypothesized escape of accreting supermassive black holes from galactic nuclei as a consequence of asymmetric ejection of plasma clouds from their accretion disks and their subsequent defunction for ...

Browsing IIAP Publications by Subject "Galactic Nuclei"

Browsing IIAP Publications by Subject "Galactic Nuclei"

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