The radio structure of high-energy peaked BL Lacertae objects

被引:53
作者
Rector, TA
Gabuzda, DC
Stocke, JT
机构
[1] Natl Radio Astron Observ, Socorro, NM 87801 USA
[2] Natl Univ Ireland Univ Coll Cork, Dept Phys, Cork, Ireland
[3] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA
关键词
BL Lacertae objects : general;
D O I
10.1086/367802
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present VLA and first-epoch VLBA observations that are part of a program to study the parsec-scale radio structure of a sample of 15 high-energy peaked BL Lacertae objects (HBLs). The sample was chosen to span the range of logarithmic X-ray to radio flux ratios observed in HBLs. As this is only the first epoch of observations, proper motions of jet components are not yet available; thus, we consider only the structure and alignment of the parsec- and kiloparsec-scale jets. Like most low-energy-peaked BL Lacertae objects (LBLs), our HBL sample shows parsec-scale core-jet morphologies and compact, complex kiloparsec-scale morphologies. Some objects also show evidence for bending of the jet 10-20 pc from the core, suggesting interaction of the jet with the surrounding medium. Whereas LBLs show a wide distribution of parsec- to kiloparsec-scale jet misalignment angles, there is weak evidence that the jets in HBLs are more well aligned, suggesting that HBL jets are either intrinsically straighter or are seen further off-axis than LBL jets.
引用
收藏
页码:1060 / 1072
页数:13
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