Infrared polarimetry of radio-quiet quasars

Details Infrared polarimetry of radio-quiet quasars Infrared polarimetry of radio-quiet quasars

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...328..170s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 1, 1988, p. 170-174. Research supported by the University of Cinci

Astronomy and Astrophysics

Astronomy

9

Infrared Sources (Astronomy), Interstellar Magnetic Fields, Magnetic Field Configurations, Quasars, Synchrotron Radiation, Thermal Emission, Active Galactic Nuclei, Energetic Particles, Relativistic Particles, Seyfert Galaxies, Stellar Luminosity

Scientific paper

The polarizations of eight radio-quiet quasars have been measured at 2.2 microns. Of these, three are marginally detected with polarizations of 1.5-2 percent, while the rest have upper limits of 1-1.5 percent. This indicates that if a significant fraction of the infrared emission in these objects is due to synchrotron radiation, then either the magnetic field structure in these objects is highly disordered, or significant Faraday depolarization occurs near the source. Dilution of the synchrotron flux by unpolarized thermal emission may be present but is probably of secondary importance.

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