Astronomy and Astrophysics – Astronomy
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.305...97r&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 305, Issue 1, pp. 97-102.
Astronomy and Astrophysics
Astronomy
9
Line: Profiles, Polarization, Galaxies: Active, Galaxies: Jets, Quasars: Emission Lines, Quasars: Individual: 4C 74.26
Scientific paper
We present intermediate-resolution optical spectropolarimetry of the radio-loud quasar 4C 74.26. Large variations in both the degree and position angle of polarization are observed across the broad H alpha line. After continuum subtraction, we find that in polarized flux this feature is redshifted by ~ 2000 km s^-1 relative to its median wavelength in total flux. We show that the H alpha polarization can be explained by scattering in a high-speed outflow which, if it is directed along the axis of the radio jet, must have a velocity >= 5000 km s^-1 in order to account for the observed redshift. The polarization position angle is not precisely orthogonal to that of the radio source, suggesting that the scattering outflow is either inhomogeneous, or somewhat misaligned with the jet axis.
Axon David J.
Corbett Elizabeth A.
Robinson Alan
Young Scott
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