Night-to-night variations in the optical continuum flux from the nucleus of NGC 1275

Details Night-to-night variations in the optical continuum flux from the nucleus of NGC 1275 Night-to-night variations in the optical continuum flux from the nucleus of NGC 1275

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...230l.141g&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 230, June 15, 1979, p. L141-L144.

Astronomy and Astrophysics

Astronomy

10

Astronomical Photometry, Diurnal Variations, Galactic Nuclei, Optical Polarization, Spectrophotometry, Astronomical Models, Compton Effect, Data Reduction, Night Sky, X Ray Astronomy

Scientific paper

Spectrophotometry of the nucleus of NGC 1275 on six consecutive nights reveals about 30% variations in the 4000-6000 A continuum flux with no detectable change in spectral shape. This variability and the night-to-night variations in optical polarization reported by Martin, Angel, and Maza (1976) suggest a nonthermal source with a diameter not greater than 10 to the 16th cm. The inverse Compton scattered X-ray flux from such a source should be variable on a similar time scale. A simple model of the adiabatic expansion of the optical source explains the spectrum of the compact (about 1 pc) radio components in NGC 1275.

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