Correlation patterns between 11 diffuse interstellar bands and ultraviolet extinction

被引：22
|
作者：
Megier, A
Krelowski, J
Weselak, T
机构：
[1] Nicholas Copernicus Univ, Ctr Astron, PL-87100 Torun, Poland
[2] Kazimierz Wielki Acad, Dept Phys, PL-85072 Bydgoszcz, Poland
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2005年 / 358卷 / 02期
关键词：
dust; extinction; ISM : molecules;
D O I：
10.1111/j.1365-2966.2005.08802.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We relate the equivalent widths of 11 diffuse interstellar bands, measured in the spectra of 49 stars, to different colour excesses in the ultraviolet. We find that most of the observed bands correlate positively with the extinction in the neighbourhood of the 2175-angstrom bump. Correlation with colour excesses in other parts of the extinction curve is more variable from one diffuse interstellar band to another; we find that some diffuse bands (5797, 5850 and 6376 angstrom) correlate positively with the overall slope of the extinction curve, while others (5780 and 6284 angstrom) exhibit negative correlation. We discuss the implications of these results on the links between the diffuse interstellar band carriers and the properties of the interstellar grains.
引用
收藏
页码：563 / 571
页数：9
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