Balmer decrement of quasars and Seyfert I galaxies.

Details Balmer decrement of quasars and Seyfert I galaxies. Balmer decrement of quasars and Seyfert I galaxies.

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989scisn..32..971c&link_type=abstract

Scientia Sinica, Ser. A, Vol. 32, No. 8, p. 971 - 982

Computer Science

Seyfert Galaxies: Balmer Lines, Seyfert Galaxies: Redshifts, Quasars: Balmer Lines, Quasars: Redshifts

Scientific paper

The authors compile the observed intensity ratios of the Balmer lines for low redshift quasars and Seyfert I galaxies. In the framework of the Cerenkov line emission theory, they compare the theoretical intensity ratios with those of observations, and find that the observed intensity ratios for the radio-loud quasars and the Seyfert I galaxies are nearer to the theoretical expectation than those for the radio-quiet sources. It seems that for the radio-loud AGNs, the characteristics of the Cerenkov line emission are more remarkable because of the existence of a great number of relativistic electrons. The authors also discuss the reddening by dust in quasars and the Seyfert galaxies. The fact that the reddening of the Seyfert galaxies is more serious than quasars shows that the Seyfert galaxies have more dust than quasars. This is in agreement with the present point of view.

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