Multifrequency VLBI observations of the nucleus of NGC 1275

Details Multifrequency VLBI observations of the nucleus of NGC 1275 Multifrequency VLBI observations of the nucleus of NGC 1275

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...256...83u&link_type=abstract

Astrophysical Journal, Part 1, vol. 256, May 1, 1982, p. 83-91.

Astronomy and Astrophysics

Astronomy

29

Galactic Nuclei, Radio Sources (Astronomy), Seyfert Galaxies, Very Long Base Interferometry, Compton Effect, Relativistic Particles, Spectral Energy Distribution, Synchrotron Radiation, Variability

Scientific paper

VLBI observations of the compact nucleus of NGC 1275 (3C 84) have been made at 1.7, 5.0, and 10.7 GHz, using arrays of four and five telescopes. Hybrid maps derived from these observations reveal complex structure on scales between 1 and 14 milli-arcsec, with strong frequency dependence. Two regions with strongly inverted spectra show up from comparison of the 5.0 and 10.7 GHz maps. Assuming that these represent synchrotron self-absorption, it is concluded that either there are at least two sources of relativistic electrons in this object, or one of the features is a knot in a jet ejected from the central core. Thse components are able to produce the observed hard X-ray flux from the Perseus cluster by inverse Compton scattering of synchrotron-emitting photons.

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