%0 Journal Article
%T Diffuse interstellar bands as probes of small-scale interstellar structure
%A Keith T. Smith
%A Martin A. Cordiner
%A Peter J. Sarre
%J Physics
%D 2013
%I arXiv
%R 10.1017/S1743921313015779
%X We present observations which probe the small-scale structure of the interstellar medium using diffuse interstellar bands (DIBs). Towards HD 168075/6 in the Eagle Nebula, significant differences in DIB absorption are found between the two lines of sight, which are separated by 0.25 pc, and {\lambda}5797 exhibits a velocity shift. Similar data are presented for four stars in the {\mu} Sgr system. We also present a search for variations in DIB absorption towards {\kappa} Vel, where the atomic lines are known to vary on scales of ~10 AU. Observations separated by ~9 yr yielded no evidence for changes in DIB absorption strength over this scale, but do reveal an unusual DIB spectrum.
%U http://arxiv.org/abs/1307.3798v1