Seven-frequency VLBI observations of the GHz-Peaked-Spectrum source OQ 208
Seven-frequency VLBI observations of the GHz-Peaked-Spectrum source OQ 208
复制标题
GHz 峰值频谱源 OQ 208 的七频 VLBI 观测
DOI:
10.1088/1009-9271/7/5/01
复制
发表时间:
2007-03
期刊:
影响因子:
--
通讯作者:
Shen, Zhi-Qiang
中科院分区:
文献类型:
--
作者:
Luo, Wen-Feng;Cui, Lang;Yang, Jun;Liu, Xiang;Shen, Zhi-Qiang
We present quasi-simultaneous VLBI images of the GHz-Peaked-Spectrum radio source OQ 208 obtained with the Very Long Baseline Array at 1.4, 1.7, 2.3, 5.0, 8.4, 15.4 GHz and the European VLBI Network at 6.7 GHz. The low frequency (1.4, 1.7 and 2.3 GHz) observations reveal a weak and extended steep-spectrum component at about 30mas away at position angle -110 degrees, which may be a remnant emission. The radio structure of OQ 208 consists of two mini-lobes at 5.0, 6.7, 8.4 and 15.4 GHz. Our spectral analysis further confirms that the southwest lobe undergoes free-free absorption and finds that the free-free absorption is stronger in the inner region. By fitting the 8.4 GHz images from 1994 to 2005, we obtain a separation speed of 0.031+/-0.006 mas yr(-1) between the two mini-lobes. This indicates a jet proper motion of 0.105+/-0.020 c and a kinematic age of 219+/-42 yr for the radio source.
登录
查看更多内容
DOI:
10.1017/s0074180900074507
发表时间:
1981-09
期刊:
--
影响因子:
--
作者:
Kenneth I. Kellermann;I. Pauliny-Toth
通讯作者:
Kenneth I. Kellermann;I. Pauliny-Toth
DOI:
10.1088/1009-9271/5/6/001
发表时间:
2005-12
期刊:
Chinese Journal of Astronomy and Astrophysics
影响因子:
--
作者:
Jun Yang;Xiang Liu;Zhi-qiang Shen
通讯作者:
Jun Yang;Xiang Liu;Zhi-qiang Shen
DOI:
--
发表时间:
2001
期刊:
--
影响因子:
--
作者:
通讯作者:
--
影响因子:
6.5
作者:
C. Stanghellini;D. Dallacasa;C. O’Dea;S. Baum;R. Fanti;C. Fanti
通讯作者:
C. Stanghellini;D. Dallacasa;C. O’Dea;S. Baum;R. Fanti;C. Fanti
影响因子:
8.7
作者:
C. Stanghellini;C. O’Dea;S. Baum;E. Laurikainen
通讯作者:
C. Stanghellini;C. O’Dea;S. Baum;E. Laurikainen