Double troughs in broad absorption line quasars and Ly-alpha-N V line-locking

Details Double troughs in broad absorption line quasars and Ly-alpha-N V line-locking Double troughs in broad absorption line quasars and Ly-alpha-N V line-locking

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apjs...88..357k&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 88, no. 2, p. 357-381.

Astronomy and Astrophysics

Astrophysics

79

Absorption Spectra, Computerized Simulation, Kolmogorov-Smirnov Test, Lyman Alpha Radiation, Monte Carlo Method, Quasars, Emission Spectra, Pixels

Scientific paper

It was investigated whether the double trough (DT) structure in the mean C IV BAL trough reported by Weymann et al. (1991) is real or due to statistical fluctuations of BAL troughs over random outflow velocities in a limited sample. A sample of 72 BAL QSOs with C IV BAL troughs was analyzed. It is found that only 22 percent of the sample explicitly exhibits the DT feature; when present the DTs are deep. A Monte Carlo simulation of the mean C IV BAL suggests that the DT feature is real at only the 95-98 percent level.

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