A Study on the Correlations between Diffuse Interstellar Bands

作者：Xiang, Fuyuan^*; Liu, Zhou; Yang, Xuejuan

来源：Publications of the Astronomical Society of Japan, 2012, 64(2): 31.

DOI：10.1093/pasj/64.2.31

• ISM: lines and bands

Correlations between diffuse interstellar band equivalent widths (EWs) were sought, using a database of 45 prominent diffuse interstellar bands (DIBs) and seven C-2 bands in 278 sightlines collected from the literature. We found that 11 pairs of DIBs (lambda 5544/5797 angstrom, lambda 5544/6196 angstrom, lambda 5544/6614 angstrom, lambda 5809/6196 angstrom, lambda 5809/6203 angstrom, lambda 5809/6270 angstrom, lambda 5809/6614 angstrom, lambda 6196/6614 angstrom, lambda 6196/6699 angstrom, lambda 6203/6284 angstrom, and lambda 6270/6699 angstrom) show a strong correlation with high coefficient (R >= 0.95), 416 pairs show a good correlation (0.7 <= R <= 0.95) and 358 pairs show a poor correlation (R < 0.7). According to the values of the correlation coefficients and the spectroscopic features, we divided some of the 45 prominent DIBs into two isolated families.

• 出版日期2012-4-25
• 单位湘潭大学