Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...284..512w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 284, Sept. 15, 1984, p. 512-518. Research supported by the U.S. Department
Astronomy and Astrophysics
Astrophysics
22
Astronomical Spectroscopy, Bl Lacertae Objects, Radiation Sources, Compton Effect, Infrared Spectra, Iue, Radio Spectra, Synchrotron Radiation, X Ray Spectra
Scientific paper
Spectral measurements of the two BL Lac objects OQ 530 and ON 325 are presented. The measurements were taken at frequencies ranging from radio to ultraviolet. Both sources show spectral curvature between the infrared and ultraviolet frequencies. The intensity and spectral shape of OQ 530 vary, but the spectral shape of ON 325 appears to remain constant during intensity variability. A nonthermal theoretical model of jet emission is developed which incorporates both the spectral and time variability data. The model predicts that ON 325 radiates at X-ray frequencies with Compton radiation dominating over synchrotron emission. The angular size of the jet emission is predicted to be less than 0.1 milli-arcsec at high radio frequencies.
Aller Hugh D.
Aller Margo F.
Bruhweiler Fred C.
Cordova France A.
Hodge Philip E.
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