Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977afz....13...21t&link_type=abstract
Astrofizika, vol. 13, Feb. 1977, p. 21-31. In Russian.
Astronomy and Astrophysics
Astronomy
Galactic Radiation, Radio Sources (Astronomy), Seyfert Galaxies, Ubv Spectra, Continuous Spectra, Electron Energy, Energy Spectra, Flares, Nonthermal Radiation, Synchrotron Radiation
Scientific paper
Radio observations of the Seyfert galaxy NGC 1275 performed in the period between 1960 and 1973 are presented as a function of time, and these data are combined with UBV observations in the visible region to construct the source spectrum over the frequency range from 10 to the 7th power to 10 to the 15th power Hz. The physical parameters characterizing the relativistic electrons that radiate in the radio and visible regions are computed on the assumption that the nonthermal emission is synchrotron in nature; the energetic spectra of these electrons are also obtained. It is proposed that the observed optical outbursts differ from each other only in the number of injected electrons. The energy density of the relativistic electrons in a single energy interval is found to change more at the minimum of an outburst than at the maximum. It is suggested that the optical outbursts (lasting about 150 days) are superimposed on other variations of longer duration (approximately 1.5 years).
Iankulova I. M.
Tsvetanov Zlatan I.
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