3 papers
astro-ph2008★ 19 cited
Spatial and Temporal Variations in Interstellar Absorption toward HD 72127AB
Daniel E. Welty, Thuso Simon, L. M. Hobbs
New optical spectra of Ca II and Na I toward HD 72127AB provide additional evidence for both spatial and temporal variations in the complex interstellar absorption along the two si…
astro-ph2007★ 27 cited
Monitoring the Variable Interstellar Absorption toward HD 219188 with HST/STIS
Daniel E. Welty
We discuss the results of continued spectroscopic monitoring of the variable intermediate-velocity (IV) absorption at v = -38 km/s toward HD 219188. After reaching maxima in mid-20…
astro-ph2006★ 165 cited
Abundances and Behavior of 12CO, 13CO, and C2 in Translucent Sight Lines
P. Sonnentrucker, D. E. Welty, J. A. Thorburn +1
Using UV spectra obtained with FUSE, HST, and/or IUE, we determine interstellar column densities of 12CO, 13CO, and/or C_2 for ten Galactic sight lines with 0.37<E(B-V)<0.72. The N…