The Connection between Different Tracers of the Diffuse Interstellar Medium: Kinematics
Lambert, D. L.; Federman, S. R.; Goldsmith, Paul F.; Pineda, Jorge L.; Langer, William D.; Rice, Johnathan S.; Flagey, Nicolas
United States
Abstract
Using visible, radio, microwave, and submillimeter 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 helps 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 H2 gas probed by C+ emission and discuss the kinematic connections among the species observed.