Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.294..478y&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 294, p. 478
Astronomy and Astrophysics
Astronomy
24
Radio Galaxies, Astronomical Polarimetry, Active Galactic Nuclei, H Alpha Line, Spectral Line Width, Radio Scattering, Polarization Characteristics, Near Infrared Radiation, Visible Spectrum
Scientific paper
We present spectropolarimetric observations of the radio galaxy 3C 234 at optical and, for the first time, near-IR wavelengths. In agreement with previous observations we detect broad H-alpha in total and polarized flux, consistent with the scenario in which the central active nucleus is hidden from view and observed via scattered radiation. We model the flux and polarization properties at optical and near-IR wavelengths, which result in a point-source, cone-based scattering geometry in the optical and an extended source scattering in the near-IR, with a dichroic view to the emission regions, which becomes important only at the longer wavelengths. From this model we calculate an intrinsic H-alpha luminosity of 4.9 x 10 exp 44 erg/s, and an extinction to the near-IR emission region of 60 mag for A(V). The scattered radiation also undergoes extinction, this time by 1 mag for A(V), assuming a source function of a typical stellar-subtracted Seyfert 1 galaxy. We also require that the scatterers are in bulk radial outflow at approximately 600 km/s to explain an observed increase in the intrinsic polarization of the scattered broad H-alpha line in the red wing, and blueshifted narrowline components in polarized flux.
Axon David J.
Fabian Andrea C.
Hough James H.
Ward Martin J.
Young Scott
No associations
LandOfFree
The obscured BLR in the radio galaxy 3C 234 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The obscured BLR in the radio galaxy 3C 234, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The obscured BLR in the radio galaxy 3C 234 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-958564