A slower superluminal velocity for the quasar 1156+295

被引：21

作者：

Piner, BG

Kingham, KA

机构：

[1] UNIV MARYLAND,DEPT ASTRON,COLLEGE PK,MD 20742

[2] NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD

来源：

ASTROPHYSICAL JOURNAL | 1997年 / 485卷 / 02期

关键词：

galaxies; jets; quasars; individual; (1156+295); radio continuum;

D O I：

10.1086/310820

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

As part of an ongoing effort to observe high-energy gamma-ray blazars with VLBI, we have produced 8 and 2 GHz VLBI images, at 10 epochs spanning the years 1988 to 1996, of the quasar 1156+295. The VLBI data have been taken from the Washington VLBI correlator's geodetic database. We have detected four components and have measured their apparent speeds to be 8.8 +/- 2.3, 5.3 +/- 1.1, 5.5 +/- 0.9, and 3.5 +/- 1.2 h(-1)c from the outermost component inward. (H-0 = 100 h km s(-1) Mpc(-1), q(0) = 0.5 throughout this Letter). These velocities contradict a previously published very high superluminal velocity of 26 h(-1)c for this source.

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页码：L61 / L63

页数：3

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