The Gravitational Lens MG 0414+0534: A Link between Red Galaxies and Dust
The Gravitational Lens MG 0414+0534: A Link between Red Galaxies and Dust
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引力透镜 MG 0414 0534：红色星系与尘埃之间的联系
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
D. Weedman
中科院分区：
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作者：
B. McLeod;G. Bernstein;M. Rieke;D. Weedman
我们提出了近红外观测的红色引力透镜系统MG 0414+0534。我们的图像质量足够，可以对所有四个类星体图像和透镜星系进行测光。观测结果表明，K波段的亮度分量更类似于无线电亮度比光学，从而支持的概念，该系统是高度红化。在可见光波段不同的亮度被解释为在透镜星系的消光量的变化。这个透镜星系在K波段被探测到，它的红色与任何其他已知的具有可比视星等的星系一样。根据费伯-杰克逊关系和光度学的考虑，估计透镜星系的红移为0.45 < z < 0.6。通过扩展，我们认为其他非常红场的星系可能包含大量的尘埃。各组分的K带谱表明，各组分间的Hα等效宽度没有差别。这是反对显著微透镜效应的证据。
We present near-IR observations of the red gravitational lens system MG 0414+0534. Our images are of sufficient quality to allow photometry of all four QSO images and the lens galaxy. The observations show that the K-band brightnesses of the components are more similar to the radio brightnesses than to the optical and thus support the notion that the system is highly reddened. The differing brightnesses at visible wavelengths are interpreted as variable amounts of extinction in the lens galaxy. The lens galaxy is detected in the K band and is as red as any other known galaxy of comparable apparent magnitude. An estimate of the redshift of the lens galaxy of 0.45 < z < 0.6 is determined from the Faber-Jackson relation and photometric considerations. By extension, we argue that other very red field galaxies may contain large amounts of dust. K-band spectra of the individual components show no difference in the Hα equivalent widths among the components. This is evidence against significant microlensing.