Results 101 to 110 of about 573 (139)
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Astronomische Nachrichten, 1976
AbstractThe parameters of fifteen active nuclei are determined from spectroscopic and photometric observations. The values of bolometric luminosity, gas volume and mass, kinetic energy, characteristic dimension and kinematic time‐scale are given. The fluxes of radiative and mechanical energy of the gas envelope are compared. A steady‐state model of the
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AbstractThe parameters of fifteen active nuclei are determined from spectroscopic and photometric observations. The values of bolometric luminosity, gas volume and mass, kinetic energy, characteristic dimension and kinematic time‐scale are given. The fluxes of radiative and mechanical energy of the gas envelope are compared. A steady‐state model of the
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On the Activity of the Nuclei of Galaxies
1979The history of science is aware of cases when the name of the author of one theory or concept or another, that has won universal acknowledgement, Is often not mentioned or even forgotten. I do not believe that the name of the man who advanced and substantiated the Idea of the activity of the nuclei of galaxies, Prof. Ambartsumian, is somehow forgotten.
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Megamasers in Nuclei of Galaxies
1986Powerful maser emission has been detected in a small number of galaxies. Most of these have Seyfert or starburst nuclei and exhibit other signs of galactic activity. Broad OH emission has been seen in the prototype megamaser IC 4553 (= Arp 220) (Baan, Wood, and Haschick 1982; Baan and Haschick 1984; Norris et al. 1985), NGC 3690 and Mrk 231 (Baan 1985).
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Recurrent explosions in the nuclei of galaxies
Astrophysics and Space Science, 1983High-velocity ejection of gas from the central region of galaxies is now an observationally established phenomenon. Such ejections have been attributed to some kind of activities in the nuclei of galaxies. It has been suggested that conditions leading to explosive events periodically prevail in the centre of galaxies causing recurrent explosions and ...
B. Basu, Tara Bhattacharyya
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Theories of the nuclei of active galaxies
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1979Abstract The underlying source of power in active galaxies and quasars is still debated. X-ray observations of these objects may relate more directly with this power source than observations in other wavebands. Theories of active galactic nuclei are reviewed, together with X-ray production mechanisms, both thermal and non-thermal ...
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Detection of Double-Nuclei Galaxies in SDSS
CoRR, 2020Anwesh Bhattacharya +2 more
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