Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006arep...50..202c&link_type=abstract
Astronomy Reports, Volume 50, Issue 3, p.202-209
Astronomy and Astrophysics
Astronomy
5
Pacs Numbers 98.54.C
Scientific paper
We have carried out a search for compact radio sources in the cores of 16 nearby radio galaxies. We detected compact components in four radio galaxies, and found upper limits for the flux density in compact components in ten radio galaxies. VLBI observations enabled the detection of a turnover in the spectra of the two nearby radio galaxies 3C 111 and 3C 465. Using a method based on an inhomogeneous model for a synchrotron source, we estimate the magnetic-field strength and the energy densities in the magnetic field and relativistic electrons in the cores of these radio galaxies. Strong inhomogeneity in the distribution of the magnetic fields in the cores of 3C 111 and 3C 465 is implied by our analysis. The magnetic-field strengths in the central regions of these galactic nuclei, on scales of ˜0.1 pc, exceed the mean strength by four to five orders of magnitude, and lie in the range 102 G < H < 104 G.
Artyukh Vadim S.
Chernikov P. A.
Lapaev K. A.
Tyul'bashev S. A.
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