Ca II and CH+ interstellar absorption observations in the direction of resolvable binary stars.

Details Ca II and CH+ interstellar absorption observations in the direction of resolvable binary stars. Ca II and CH+ interstellar absorption observations in the direction of resolvable binary stars.

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ncimc..20..707p&link_type=abstract

Nuovo Cimento C, Vol. 20C, N. 5, p. 707 - 712

Computer Science

Interstellar Matter: Small-Scale Structure, Interstellar Matter: Absorption Lines

Scientific paper

Reports 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 Å and Ca II K at 3933 Å 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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