Is C-IV lambda 1549 a standard cosmic candle

Details Is C-IV lambda 1549 a standard cosmic candle Is C-IV lambda 1549 a standard cosmic candle

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.193..537j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 193, Nov. 1980, p. 537-548.

Astronomy and Astrophysics

Astronomy

12

Astronomical Spectroscopy, Emission Spectra, Line Spectra, Quasars, Reference Stars, Stellar Spectra, Carbon, Hubble Diagram, Red Shift, Spectral Line Width

Scientific paper

It is difficult to observe emission lines of small equivalent width in intrinsically faint QSOs. This selection effect biasses the slope of the log (intrinsic continuum luminosity) versus log (C-IV equivalent width) diagram for samples of QSOs such as those of Baldwin and those taken from slitless spectrum surveys. There is no such bias for QSO samples drawn from radio surveys, and such data suggest that the total flux of the C IV line may itself be a good standard candle. The best way to determine q(0) from QSO samples may be to look at the upper envelope of the m(C-IV)-Z relationship.

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