Internal redshift difference and central mass in QSOs

Details Internal redshift difference and central mass in QSOs Internal redshift difference and central mass in QSOs

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...350..512z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 350, Feb. 20, 1990, p. 512-517.

Astronomy and Astrophysics

Astrophysics

16

Active Galactic Nuclei, Forbidden Transitions, H Beta Line, Mass Distribution, Quasars, Red Shift, Iron, Line Spectra, Oxygen Spectra

Scientific paper

The redshifts of broad H-beta and narrow forbidden O III emission lines are measured and compared in 31 low-redshift QSOs with weak or absent optical Fe II features. The redshifts are often not the same for the broad and narrow lines. The distribution of peak redshift differences for the sample is centered near zero. At larger widths the distribution is skewed, suggesting that H-beta more often shows a higher redshift. A mean redshift difference at FWHM of about 300 km/s is found between broad H-beta and the narrow forbidden O III lines. This value appears to set an upper limit to the central mass, on the order of 10 to the 9th solar masses, and further to imply the dominance of radiative acceleration in the broad line region of these QSOs.

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