The Extinction Law in High-Redshift Galaxies
The Extinction Law in High-Redshift Galaxies
复制标题
高红移星系的灭绝定律
DOI：
10.1086/382500
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
E. Mediavilla
中科院分区：
文献类型：
--
作者：
J. A. Muñoz;E. Falco;C. Kochanek;B. McLeod;E. Mediavilla
我们估计了两个中间红移星系中的尘埃消光定律。 LBQS 1009-0252 透镜星系中的尘埃估计透镜红移为 zl ≃ 0.88，似乎与 SMC 类似，但在 2175 Å 处没有明显特征。只有当透镜星系的红移为zl≃0.3，与星系颜色、光度和在基本平面上的位置完全不一致时，数据才能拟合正常的银河消光曲线。 B028+357 的 zl = 0.68 透镜星系中的尘埃，其红色图像位于分子云后面，需要非常平坦的紫外线消光曲线，（形式上）RV = 12 ± 2。按照银河标准，两个透镜系统似乎都具有不寻常的消光曲线。
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 zl ≃ 0.88, appears to be similar to that of the SMC, with no significant feature at 2175 Å. Only if the lens galaxy is at a redshift of zl ≃ 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 zl = 0.68 lens galaxy for B028+357, whose reddened image lies behind a molecular cloud, requires a very flat ultraviolet extinction curve with (formally) RV = 12 ± 2. Both lens systems seem to have unusual extinction curves by Galactic standards.