Systematic asymmetries in H-beta lines of radio-loud quasars

Details Systematic asymmetries in H-beta lines of radio-loud quasars Systematic asymmetries in H-beta lines of radio-loud quasars

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.236...97j&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 236, Jan. 1, 1989, p. 97-105.

Other

14

Extragalactic Radio Sources, H Beta Line, Quasars, Astronomical Spectroscopy, Asymmetry, Gas Flow, Iron, Oxygen

Scientific paper

Spectroscopic observations of the forbidden O III 4959,5007 and H-beta region in a sample of 47 radio-loud quasars are reported, and it is found that the profile of this line is consistently asymmetrical towards the red. Some of these asymmetries can be produced by contaminating lines of Fe II of strengths similar to those proposed by earlier workers. In other cases, however, two further processes may be necessary: there may be contaminating lines such as He I 4922,5016 and broad forbidden O III 4959,5007, or intrinsic asymmetries caused by large-scale motions of high-velocity gas.

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