The relation between far-UV and visible extinctions
arXiv:astro-ph/0110544 · doi:10.1016/S1384-1076(02)00098-2
Abstract
For directions of sufficcient reddening (E(B-V) >~ 0.25), there is a simple relation between the slope of the extinction curve in the far-UV and E(B-V). Regardless of direction, the far-UV extinction curve is proportional to 1/lambda^n exp(-2e(B-V)/lambda) (lambda in micron, n = 4), in accordance with the idea that reddened stars spectra are contaminated by scattered light (Zagury, 2001b). This relation is not compatible with the standard theory of extinction which states that far-UV and visible extinctions are due to different classes of grains. In the standard theory model the two (far-UV and visible) extinctions vary thus independently according to the proportion of each type of grains. In preceding papers I have shown that the standard theory cannot explain UV observations of nebulae, and is contradicted by the UV spectra of stars with very low reddening: for how long shall the standard theory be considered as the interpretation of the extinction curve?
13 pages, 4 figures, 2 tables
Cited by in corpus (5)
- Testing New Ideas Regarding the Nature of Interstellar Extinction
- The 2200 A bump and the UV extinction curve
- On the relationship between the continuum of interstellar extinction curves, the 2200 Å bump, and the diffuse interstellar bands
- The incompatibilities between the standard theory of interstellar extinction and observations
- A review of the properties of the scattered starlight which contaminates the spectrum of reddened stars