Palazzi, E. and Attolini, M. R. and Crane, P. (1997) Ca II and CH+ interstellar absorption observations in the direction of resolvable binary stars. Il nuovo cimento C, 20 C (5). pp. 707-712. ISSN 1826-9885
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Abstract
We report the initial results of a study to probe the small-scale structure in diffuse interstellar clouds by observing optical absorption lines of CH+ at 4232 °A and Ca II K at 3933 °A towards both components in resolvable binary systems. The data analysis is still in progress. To date, 70% of the Ca II spectra have been analyzed for the 19 observed systems. For half of these, a difference in the line strength or in the number of calcium components is found. The sightlines have been selected so that the observing method provides a potential probe of the small-scale structure of the interstellar medium in the range 200-4000 AU.
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