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arXiv 0907.4467astro-ph.GAastro-ph.SR
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仙王座反射星云NGC 7023周围恒星的测光和分类。II。星际灭绝和云距离

Photometry and classification of stars around the reflection nebula NGC 7023 in Cepheus. II. Interstellar extinction and cloud distances

K. Zdanavicius, J. Zdanavicius, V. Straizys, M. Maskoliunas

摘要:

在l = 104.1度,b = +14.2度的反射星云NGC 7023方向上,在1.5平方度的区域内研究了星际消光。这项研究是基于光度分类,并根据发表在论文I(2008年)中的维尔纽斯七色系统的光度测定,确定了480颗恒星的星际距离和距离,这些恒星的亮度低至V = 16.5等。被调查的区域被划分为五个较小的子区域略有不同的距离上的消光的依赖。红化恒星的分布与282 pc和715 pc处的两个尘埃云一致,但在某些方向上,尘埃云的分布可能是连续的,也可能存在更多的尘埃云。

英文摘要:

Interstellar extinction is investigated in a 1.5 square degree area in the direction of the reflection nebula NGC 7023 at l = 104.1 deg, b = +14.2 deg. The study is based on photometric classification and the determination of interstellar extinctions and distances of 480 stars down to V = 16.5 mag from photometry in the Vilnius seven-color system published in Paper I (2008). The investigated area is divided into five smaller subareas with slightly different dependence of the extinction on distance. The distribution of reddened stars is in accordance with the presence of two dust clouds at 282 pc and 715 pc, however in some directions the dust distribution can be continuous or more clouds can be present.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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