Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...358..835h&link_type=abstract
Astronomy and Astrophysics, v.358, p.835-840 (2000)
Astronomy and Astrophysics
Astrophysics
11
Galaxies: Quasars: Absorption Lines, Galaxies: Quasars: General, Polarization
Scientific paper
On the basis of a sample of approximately 50 broad absorption line quasi-stellar objects (BAL QSOs), we investigate possible correlations between BAL QSO radio properties and other spectral characteristics, including polarization. For this purpose new polarization data have been obtained. The main result of our statistical study is the absence of significant correlations between the radio-to-optical flux ratio Rstar and all other quantities: the polarization p_0 of the continuum, the slope of the continuum, the balnicity and detachment indices which characterize the BAL profiles, and the terminal velocity of the flow v_max. The claimed anticorrelation between Rstar and v_max is therefore not confirmed, as well as the correlation between Rstar and p_0 predicted by some models. Although marginally significant, the only possible correlations occur for the BAL QSOs with low-ionization troughs. Based on observations collected at the European Southern Observatory (ESO, La Silla)
Hutsemékers Damien
Lamy Herve
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