New data on the P0-oscillation of the nucleus of the Seyfert galaxy NGC 4151.

Details New data on the P0-oscillation of the nucleus of the Seyfert galaxy NGC 4151. New data on the P0-oscillation of the nucleus of the Seyfert galaxy NGC 4151.

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998kfnt...14...67k&link_type=abstract

Kinematika Fiz. Nebesn. Tel, Tom 14, No. 1, p. 67 - 76

Mathematics

Logic

Active Galactic Nuclei: Seyfert Galaxies, Active Galactic Nuclei: Oscillations, Active Galactic Nuclei: Cosmology

Scientific paper

The presence of the periodicity P0 = 160.0101±0.0001 min in the brightness variations of active galactic nuclei is often subjected to criticism by some astrophysicists. With the aim to check the P0-effect, an extensive series of photometric observations of the Seyfert galaxy NGC 4151 was obtained in 1987 - 1994 using two Crimean reflectors. These new data confirmed the presence of the P0-periodicity with the stable (over 26 yr) initial phase and the mean harmonic amplitude ≍7 mmag (in the V filter). This conclusion is supported by analysis of the X-ray data (1975 - 1991) obtained by satellites Ariel-5, EXOSAT and Ginga. Since just the same period has been detected earlier in the power spectrum of global oscillations of the Sun, the conclusion is drawn about its cosmological origin.

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