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首页> 外文期刊>The Astrophysical journal >THE EXTINCTION LAW IN HIGH-REDSHIFT GALAXIES
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THE EXTINCTION LAW IN HIGH-REDSHIFT GALAXIES

机译:高引力星系中的消亡定律

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We estimate the dust extinction laws in two intermediate-redshift galaxies. The dust in the lens galaxy of LBQS 1009-0252, which has an estimated lens redshift of z_l approx= 0.88, appears to be similar to that of the SMC, with no significant feature at 2175 A. Only if the lens galaxy is at a redshift of z_l approx= 0.3, which is completely inconsistent with the galaxy colors, luminosity, and location on the fundamental plane, can the data be fitted with a normal Galactic extinction curve. The dust in the z_l = 0.68 lens galaxy for B028+357, whose reddened image lies behind a molecular cloud, requires a very flat ultraviolet extinction curve with (formally) R_V =12 +- 2. Both lens systems seem to have unusual extinction curves by Galactic standards.
机译:我们估计了两个中红移星系中的尘埃消灭定律。 LBQS 1009-0252镜头星系中的尘埃,其估计的镜头红移约为z_1 = 0.88,看起来与SMC相似,在2175 A时无明显特征。仅当镜头星系处于z_l的红移约= 0.3,这与星系的颜色,亮度和在基面上的位置完全不一致,可以将数据与正常的银河消光曲线拟合。对于B028 + 357,z_l = 0.68透镜星系中的尘埃,其变红的图像位于分子云后面,需要非常平坦的紫外线消光曲线,(正式)R_V = 12 +-2。这两个透镜系统似乎都具有异常的消光曲线。按照银河标准。

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