Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..254..463k&link_type=abstract
In: Testing the AGN paradigm; Proceedings of the 2nd Annual Topical Astrophysics Conference, Univ. of Maryland, College Park, Oc
Astronomy and Astrophysics
Astronomy
1
Bl Lacertae Objects, Extragalactic Radio Sources, Radio Galaxies, Sky Surveys (Astronomy), Very Large Array (Vla), X Ray Astronomy, Heao 1, Line Of Sight, Relativistic Effects, Rosat Mission
Scientific paper
Observations of 13 X-ray selected BL Lacertae objects (X-BL Lacs) from the HEAO-1 Large Area Sky Survey have been obtained with the Very Large Array. These X-BL Lacs are Fanaroff-Riley I radio sources, and are less core-dominated than traditional radio selected BL Lacs (R-BL Lacs). The radio properties are consistent with a 'unified scheme' connecting BL Lacs with FR I radio galaxies, where X-BL Lacs are oriented at larger angles to the line-of-sight than R-BL Lacs. However, the X-ray emission does not appear to be as strongly relativistically beamed as the radio and may be completely unbeamed.
Feigelson Eric D.
Kollgaard Ron I.
Laurent-Muehleisen Sally A.
Moellenbrock George A.
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