Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.254..488m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 254, Feb. 1, 1992, p. 488-492.
Astronomy and Astrophysics
Astronomy
9
Electron-Positron Plasmas, Optical Polarization, Plasma Jets, Quasars, Radio Jets (Astronomy), Synchrotron Radiation, Optical Thickness, Polarized Light, Thomson Scattering, X Rays
Scientific paper
The nearby bright quasar 3C273 has an extended multiband jet whose spatial pattern of intensity differs strongly from band to band. It is proposed that only the radio power of the jet is accounted for by the usual synchrotron model. All the higher energy photons seen are instead secondary, 'misdirected' photons from the bright quasar core scattered our way by material within the jet. This model gives a good account of form, spectrum, polarization, and intensity pattern along the jet in all the higher bands. Dust cannot plausibly scatter the X-rays seen, but Thomson scattering fits all bands well. Ordinary hydrogen plasma demands uncomfortably high scattering mass. A thousand-fold reduction in mass is secured if the scattering material, though not the main flow, is an electron-positron plasma.
Morrison Philip
Sadun Alberto
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