Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...154...15r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 154, no. 1-2, Jan. 1986, p. 15-24.
Astronomy and Astrophysics
Astronomy
52
Charge Coupled Devices, Optical Polarization, Polarimetry, Radio Jets (Astronomy), Emission Spectra, Quasars, Spatial Resolution, Synchrotron Radiation
Scientific paper
Spatially resolved CCD photo-polarimetry in three bandpasses centered at 420, 610, and 860 nm revealed three different emission regions along the jet of 3C 273: (1) The radio hot spot at 21arcsec.2 from the quasar which has a sharp continuum fall off above 7×1013Hz and is therefore clearly detected in the I, but hardly visible in the R band. (2) The optical knot at 19arcsec.5 from the core terminating the visible jet image. The knot is 13% polarized at position angle 140° in the R band, degree and angle beeing identical with 5 GHz data. This and a radio-to-optical powerlaw fν ≡ ν-0.96 are strong indications for a synchrotron origin of the knot emission. (3) The inner 11arcsec to 17arcsec of the jet, where no polarization stronger than 8% is detectable. This is in contrast to VLA observations at 5 GHz and is attributed to an additional unpolarized component observed at short wavelengths.
Meisenheimer Klaus
Roeser Hermann-Josef
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