Broad emission line variability in 3C 273

Details Broad emission line variability in 3C 273 Broad emission line variability in 3C 273

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.240..741o&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 240, Oct. 1, 1989, p. 741-751.

Astronomy and Astrophysics

Astronomy

23

Emission Spectra, H Lines, Line Spectra, Lyman Alpha Radiation, Quasars, H Beta Line, Iron, Iue, Spectral Line Width, Spectrum Analysis, Variability

Scientific paper

It is found that the broad Ly-alpha, H-beta and Fe II emission lines in the luminous quasar 3C 273 vary by 10-30 percent on time-scales less than a year. All the line variations occurred during approximately the same period. The line cores vary more than the wings, indicating that the line variability involves only part of the BLR. The line variability time-scales are shorter than predicted from standard photoionization models by a factor of a few, which may be due to the presence of an anisotropic ionizing continuum in this object.

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