Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...248l...5a&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 248, Aug. 15, 1981, p. L5-L8.
Astronomy and Astrophysics
Astronomy
30
Bl Lacertae Objects, Polarization Characteristics, Quasars, Radio Sources (Astronomy), Radiant Flux Density, Rotating Bodies
Scientific paper
Rotations in the polarization position angles over substantially more than 180 deg have been observed in BL Lac and 0727-115 at centimeter wavelengths. The broad-banded nature of the phenomenon eliminates frequency-dependent mechanisms as a possible cause, and the large range of the rotations is not consistent with relativistic-aberration type models. The most straightforward explanation for the origin of the apparent rotations is a rotating or a revolving structure in the radio emitting region.
Aller Hugh D.
Aller Margo F.
Hodge Philip E.
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