Radio haloes around BL Lacertae objects AO0235+164 and 4C03.59

Details Radio haloes around BL Lacertae objects AO0235+164 and 4C03.59 Radio haloes around BL Lacertae objects AO0235+164 and 4C03.59

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.269..780g&link_type=abstract

Nature, vol. 269, Oct. 27, 1977, p. 780, 781.

Astronomy and Astrophysics

Astronomy

9

Halos, Radio Sources (Astronomy), Stellar Radiation, Centimeter Waves, Interstellar Extinction, Lunar Occultation, Scintillation

Scientific paper

A description is presented of the lunar occultation and interplanetary scintillation observations of two BL Lac sources, AO0235+164 and 4C03.59 at 327 MHz. One of the two occultations of the former source, which is known to be an exceptionally violent variable at centimeter, infrared, and optical wavelengths, took place in November 1975 near the epoch of its major outburst. The observations indicate that at 327 MHz, part of the emission of both these sources originates in components larger than 1 arc sec. The significance of the observations is discussed, taking into account a simple core-halo model of the source and the possible existence of a more complex structure without a halo.

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