2013ApJ...773L..10R -
Astrophys. J., 773, L10 (2013/August-2)
Misalignment of the jet and the normal to the dusty torus in the broad absorption line QSO FIRST J155633.8+351758.
REYNOLDS C., PUNSLY B. and O'DEA C.P.
Abstract (from CDS):
We performed Very Long Baseline Array observations of the broad absorption line quasar FIRST J155633.8+351758, "the first radio loud BALQSO." Our observations at 15.3 GHz partially resolved a secondary component at position angle (P.A.) ~35°. We combine this determination of the radio jet projection on the sky plane, with the constraint that the jet is viewed within 14.°3 of the line of sight (as implied by the high variability brightness temperature) and with the P.A. of the optical/UV continuum polarization in order to study the quasar geometry. Within the context of the standard model, the data indicates a "dusty torus" (scattering surface) with a symmetry axis tilted relative to the accretion disk normal and a polar broad absorption line outflow aligned with the accretion disk normal. We compare this geometry to that indicated by the higher resolution radio data, brightness temperature, and optical/UV continuum polarization P.A. of a similar high optical polarization BALQSO, Mrk 231. A qualitatively similar geometry is found in these two polar BALQSOs; the continuum polarization is determined primarily by the tilt of the dusty torus.
Abstract Copyright:
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Journal keyword(s):
quasars: absorption lines - quasars: general
Simbad objects:
4
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