Discovery of a New Gravitational Lens System
Discovery of a New Gravitational Lens System
复制标题
发现新的引力透镜系统
作者：
C. Lawrence;D. Schneider;M. Schmidt;C. Bennett;J. Hewitt;B. Burke;E. Turner;J. Gunn
发现了一种新的引力透镜系统--三射电源MG2016+112。在两个22.5等恒星的光谱中发现了红移为3.2733�0.0014的五条发射线，它们的射电分量相隔3.4角秒。这是在红移如此之大的物体中观察到的最窄的线条。一个与第三射电分量重合的23等扩展光学天体的红移还没有被光谱测定，但它的已知光学性质与一个红移约为0.8的巨型椭圆星系的光学性质一致。
A new gravitational lens system, the triple radio source MG2016+112, has been discovered. Five emission lines at a redshift of 3.2733�0.0014 have been identified in the spectra of two stellar objects of magnitude 22.5 coincident with radio components 3.4 arc seconds apart. The lines are the narrowest ever observed in objects at such a large redshift. The redshift of a 23rd-magnitude extended optical object coincident with the third radio component has not been determined spectroscopically, but its known optical properties are consistent with those of a giant elliptical galaxy with a redshift of about 0.8.