Interstellar extinction and diffuse absorption features |
| |
Authors: | J Dorschner |
| |
Institution: | (1) Universitäts-Sternwarte Jena, G.D.R. |
| |
Abstract: | The equivalent width of the 2175 Å band,W
2175, well known as the big bump in the interstellar extinction curves, has been found to be closely correlated with the colour excessE
B-V as well as with the extinction differencesE
8–6 andE
9–7 defined to characterize quantitatively the steep slopes of the extinction curves in the far ultraviolet.The equivalent widths of the 5780 and 5797 Å diffuse lines show good correlation withE
B-V. The correlations ofW
5780 andW
5797 withE
8–6 resp.E
9–7 are, however, rather weak. Correlations betweenW
2175 andW
5780 and betweenW
2175 andW
5797 are indicated.The results have been qualitatively interpreted in favour of the dust model consisting of a mixture of small silicate grains and larger silicate grains coated by molecular mantles.Paper presented at the Symposium on Solid State Astrophysics, held at the University College, Cardiff, Wales, between 9–12 July 1974. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|