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M.S. Sahu, T. R. Gull, B. Woodgate, R. A. Kimble (NASA/GSFC), D. Lindler, K. Feggans (Advanced Computer Concepts/Goddard Space Flight Centre)
We present STIS ultraviolet observations of the interstellar gas towards two relatively high galactic-latitude stars located within the projection of the extended Galactic ISM structure known as Radio Loop~{\sc i}. The two stars HD~192273 (l,b = 325\circ.8,--32\circ.9) and HD~177989 (l,b = 17\circ.8,--11\circ.9) were observed using the E230H and G230MB modes available with STIS. The E230H spectra have a resolution of ~ 110,000 and extend from 2575 to 2850 Å~while the G230MB spectra have a resolution of ~ 7,000 and extend from 2480 to 2635 Å. Several components can be seen in the E230H spectra and include absorption by Mn~{\sc ii} 2576.87, 2594.5 and 2606.46 Å, Fe~{\sc ii} 2586.65 and 2600.17 Å~ and Mg~{\sc ii} 2796.35 and 2803.53~Å. Inferences on the conditions in the various absorbing structures in the ISM along the two sightlines are presented.
The author(s) of this abstract have provided an email address for comments about the abstract: msahu@panke.gsfc.nasa.gov