Intermediate resolution spectra of quasars with Z of greater than 2

Details Intermediate resolution spectra of quasars with Z of greater than 2 Intermediate resolution spectra of quasars with Z of greater than 2

Aug 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...220...71u&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 220, no. 1-2, Aug. 1989, p. 71-82.

Astronomy and Astrophysics

Astrophysics

13

Astronomical Spectroscopy, Quasars, Spectral Line Width, Carbon, Emission Spectra, Line Spectra, Ultraviolet Spectra

Scientific paper

Observations of 20 optically selected quasars with redshifts in the 2-2.7 range have been obtained with a spectral resolution of 7 A. The FWHM width of C IV is found to be centered at 5000 km/s. For the case of three of the four quasars with the narrowest C IV lines, the emission feature at 1909 A is resolved into the two lines, semiforbidden Si III 1892-A and semiforbidden C III 1909-A, suggesting that in many cases the Fe III UV 34 triplet is not a dominant contributor to this feature. In the quasar 0353-38, the C IV line is shown to be narrower than the forbidden N III 1750-A line. Four low ionization absorption line systems with z from 0.55-1.28 have been observed.

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