VLBI observations of the compact radio source in the center of the Galaxy.
VLBI observations of the compact radio source in the center of the Galaxy.
复制标题
VLBI 对银河系中心紧凑型射电源的观测。
DOI：
10.1086/181982
复制
发表时间：
1975
期刊：
影响因子：
--
通讯作者：
H. N. Ross
中科院分区：
文献类型：
--
作者：
K. Lo;R. Schilizzi;M. Cohen;H. N. Ross
在由Goldstone 64米望远镜和Owens Valley 40米望远镜组成的一个很长的基线干涉仪上（间距252公里），在银河系中心3.7厘米处探测到了一个紧凑的射电源。该源的角尺寸θ/subs/大约等于或小于0。02，对应于一个线性大小约小于200 Au或10 $sup-3 $pc，在银河系中心的距离（10 kpc）。测得的通量密度为0.6 ± 0.1焦耳。如果theta/subs/approximately，则源的亮度温度为3x10$sup 7$ K。=0. sub/“02.与以前的高分辨率观测银河系中心的比较表明，在流量密度的时间变化。讨论了致密射电源的性质。（AIP）
A compact radio source at the galactic center has been detected at 3.7 cm on a very long baseline interferometer composed of the Goldstone 64-m and the Owens Valley 40-m telescopes (separation 252 km). The source has an angular size, theta/subs/, on the order of or less than 0./sub /''02, corresponding to a linear size approximately-less-than200 AU or 10$sup -3$ pc, at the distance of the galactic center (10 kpc). The measured flux density is 0.6+-0.1 Jy. The brightness temperature of the source is 3x10$sup 7$ K if theta/subs/approx. =0./ sub /''02. Comparison with previous high-resolution observations of the galactic center suggests time variation in the flux density. The nature of the compact radio source is discussed. (AIP)