VLBI Imagings of Kilo-parsec Knot in 3C 380
作者： Shoko Koyama , Motoki Kino , Hiroshi Nagai , Kazuhiro Hada , Seiji Kameno
DOI: 10.1093/PASJ/65.2.29
关键词: Image resolution 、 Very-long-baseline interferometry 、 Physics 、 Kinematics 、 Superluminal motion 、 Proper motion 、 Knot (unit) 、 Astrophysics 、 Astronomy 、 Shock wave 、 Quasar
摘要: We investigate observational properties of a kilo-parsec scale knot in radio-loud quasar 3C 380 by using two epoch archival data obtained Very Long Baseline Interferometry (VLBI) at 5 GHz on 1998 July and 2001 April. succeed obtaining the highest spatial resolution image bright K1 located 732 milliarcseconds, or more than 20 kpc de-projected, downstream from nucleus three times better previously Papageorgiou et al. (2006). Our images reveal, with new clarity, "inverted bow-shock" structure facing its morphology resembles conical shock wave. By comparing directly, we explore kinematics obtain upper limit apparent velocity, 0.25 mas/yr 9.8 c for first time. The velocity is marginally smaller superluminal motions seen core region. Further VLBI observations are necessary to measure proper motion K1.
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