The Connection Between Different Tracers Of The Diffuse Interstellar Medium: Kinematics

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.

arXiv commentTo be published in ApJ

References in corpus (15)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
• The SIMBAD astronomical database
• The VLA Galactic Plane Survey
• A Herschel [CII] Galactic plane survey I: the global distribution of ISM gas components
• Ultraviolet Survey of CO and H_2 in Diffuse Molecular Clouds: The Reflection of Two Photochemistry Regimes in Abundance Relationships
• A Herschel [C II] Galactic plane survey II: CO-dark H2 in clouds
• The Bolocam Galactic Plane Survey. VII. Characterizing the Properties of Massive Star-Forming Regions
• C${}^{+}$ detection of warm dark gas in diffuse clouds
• Masses and Luminosities of O and B - type stars and red super giants
• The Bolocam Galactic Plane Survey V: HCO+ and N2H+ Spectroscopy of 1.1 mm Dust Continuum Sources
• High-Resolution Observations of Interstellar Ca I Absorption -- Implications for Depletions and Electron Densities in Diffuse Clouds
• Cloud Structure and Physical Conditions in Star-Forming Regions from Optical Observations. II. Analysis
• Spitzer IRS Detection of Molecular Hydrogen Rotational Emission Towards Translucent Clouds
• [CII] observations of H${}_2$ molecular layers in transition clouds
• Diffuse Atomic and Molecular Gas near IC443

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