The IR spectrum of the double QSO
The IR spectrum of the double QSO
复制标题
双QSO的红外光谱
作者：
M. Lebofsky;G. Rieke;D. Walsh;R. Weymann
双类星体0957 + 561 A，B（间距6弧s，z = 1.4）是由引力透镜1形成的假说得到了观测2的有力支持，表明存在一个介于其间的z = 0.4的巨型椭圆星系，与分量B相距<1弧s。根据透镜假说，两个类星体的通量比在所有波长上应该是相同的。观测到的任何差异都应该仅仅是由于透镜星系发射的B分量的叠加，预计这将主要出现在IR中。我们在这里报告了1.25、1.6和2.2微米的新测光，这加强了透镜作用的情况，并证实了透镜星系是一个巨大的椭圆星系。
The hypothesis that the double QSO, 0957 + 561A,B (separation 6 arcs s andz= 1.4) is formed by a gravitational lens1has found strong support from observations2suggesting the presence of an intervening giant elliptical galaxy withz≃ 0.4, separated from component B by <1 arc s. According to the lens hypothesis the flux ratio of the two QSOs should be the same at all wavelengths. Any difference observed should be due only to superposition on component B of emission from the lens galaxy, which is expected to be predominantly in the IR. We report here new photometry at 1.25, 1.6 and 2.2 µm which strengthens the case for lens action and confirms that the lens galaxy is a giant elliptical.