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The radio structure source of X-ray-selected BL Lacertae objectsArcsecond-size radio structure for a complete sample of 14 X-ray-selected BL Lac objects (XBLs) from the Einstein Extended Medium-Sensitivity Survey is presented. Most objects possess radio morphologies which are similar to those of nearby Fanaroff-Riley type 1 (FR 1) radio galaxies once the effects of surface brightness dimming and beam dilution as a function of redshift are taken into account. In order to test the beamed FR 1 hypothesis for BL Lac objects, the core and extended power levels are determined for these sources and compared with samples of radio-selected BL Lac objects (RBLs) and FR 1 from galaxies from the literature. RBLs and XBLs are found to possess extended (and thus unbeamed) power levels and the largest angular sizes similar to those of the FR 1 galaxies both supporting the beaming hypothesis and a common parent population for XBLs and RBLs.
Document ID
19930049501
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Perlman, Eric S.
(NASA Headquarters Washington, DC United States)
Stocke, John T.
(Colorado Univ. Boulder, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 406
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A33498
Funding Number(s)
CONTRACT_GRANT: NSF AST-90-20008
CONTRACT_GRANT: NAGW-2645
Distribution Limits
Public
Copyright
Other

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