Low Redshift BAL QSOs in the Eigenvector 1 Context

Details Low Redshift BAL QSOs in the Eigenvector 1 Context Low Redshift BAL QSOs in the Eigenvector 1 Context

2005-11-08

arxiv.org/abs/astro-ph/0511230v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Revista Mexicana de Astronomia y Astrofisica

Scientific paper

We attempt to characterize the geometry of Broad Absorption Line (BAL) QSOs by studying a low redshift sample of 12 sources. We find that the majority of these sources are Population A quasars as defined in (broad H-beta FWHM > 4000 kms/s; Sulenticet al 2000). A possible correlation between terminal velocity and absolute V magnitude suggests that the bolometric luminosity to black hole mass ratio \lm is a governing factor with classical BAL sources showing the highest values. CIV 1549 emission in classical BAL sources shows a profile blueshift that supports a disk wind/outflow scenario with a half opening angle of < 50 deg. Observation of ``secondary'' mini-BAL features in the CIV 1549 emission profile motivates us to model BALs with an additional component that may be involved with the BLR outflow and co-axial with the accretion disk.

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