Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...364l...5m&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 364, Nov. 20, 1990, p. L5-L8. Research supported by Northwestern
Astronomy and Astrophysics
Astrophysics
15
Binary Stars, Extragalactic Radio Sources, Interstellar Matter, Stellar Structure, Absorption Spectra, Diffusion, High Resolution, Iue, Line Spectra
Scientific paper
The initial results of a study to probe the small-scale structure in the diffuse interstellar medium (ISM) through IUE and optical observations of interstellar absorption lines toward both components of resolvable binary stars is reported. The binaries (Kappa CrA, 57 Aql, 59 And, HR 1609/10, 19 Lyn, and Theta Ser) observed with IUE have projected linear separations ranging from 5700 to 700 Au. Except for Kappa CrA, the strengths of the interstellar absorption lines toward both components of these binaries agree to within 10 percent. In the case of Kappa CrA, the optically thin interstellar Mg I and Mn II lines are about 50 percent stronger toward Kappa-2 CrA than Kappa-1 CrA. Higher resolution observations of interstellar Ca II show that this difference is concentrated in the main interstellar component at V(LSR) = 9 + or - 2 km/s. Interestingly, this velocity corresponds to an intervening cloud that may be associated with the prominent Loop I shell in the local ISM. Given the separation (23 arcsec) and distance (120 pc) of Kappa CrA, the line strength variations indicate that this cloud has structure on scales of 2800 AU or less.
No associations
LandOfFree
Small-scale structure in the diffuse interstellar medium does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Small-scale structure in the diffuse interstellar medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Small-scale structure in the diffuse interstellar medium will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-839942