Showing papers by "William D. Langer published in 2018"
01 Jan 2018
6 citations
TL;DR: In this paper, the authors derived the component structure seen in absorption at visible wavelengths from Ca II, Ca I, K I, CH, CH$+}\!,$ and CN and compared it to emission from H I, CO and its isotopologues, and C$^{+}$ from the GOT C+ survey.
Abstract: Using visible, radio, microwave, and sub-mm data, we study several lines of sight toward stars generally closer than 1 kpc on a component-by-component basis. We derive the component structure seen in absorption at visible wavelengths from Ca II, Ca I, K I, CH, CH$^{+}\!,$ and CN and compare it to emission from H I, CO and its isotopologues, and C$^{+}$ from the GOT C+ survey. The correspondence between components in emission and absorption help create a more unified picture of diffuse atomic and molecular gas in the interstellar medium. We also discuss how these tracers are related to the CO-dark H$_{2}$ gas probed by C$^{+}$ emission and discuss the kinematic connections among the species observed.
3 citations
TL;DR: In this article, the authors derived the component structure seen in absorption at visible wavelengths from Ca II, Ca I, K I, CH, CH$+}\!,$ and CN and compared it to emission from H I, CO and its isotopologues, and C$^{+}$ from the GOT C+ survey.
Abstract: Using visible, radio, microwave, and sub-mm data, we study several lines of sight toward stars generally closer than 1 kpc on a component-by-component basis. We derive the component structure seen in absorption at visible wavelengths from Ca II, Ca I, K I, CH, CH$^{+}\!,$ and CN and compare it to emission from H I, CO and its isotopologues, and C$^{+}$ from the GOT C+ survey. The correspondence between components in emission and absorption help create a more unified picture of diffuse atomic and molecular gas in the interstellar medium. We also discuss how these tracers are related to the CO-dark H$_{2}$ gas probed by C$^{+}$ emission and discuss the kinematic connections among the species observed.
2 citations