Abstract
view Abstract Citations (20) References (16) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Electron and local gas densities in diffuse interstellar clouds from measurements of CA I absorption. Federman, S. R. ; Hobbs, L. M. Abstract Electron and local gas densities in 12 diffuse interstellar clouds have been determined from absorption measurements of Ca I λ4226 and Ca II λ3934 and an assumed fractional ionization χɛ = 3 × l0-4. Individual velocity components have been analyzed separately. The values for the electron density range from 0.055 to 0.57 cm-3, while the local gas densities are between 180 and 1900 cm-3. The large values for the electron and local gas densities toward ι, ζ, and perhaps 23 Ori, where few hydrogen molecules occur, may arise from recently compressed gas behind a shock. Publication: The Astrophysical Journal Pub Date: February 1983 DOI: 10.1086/160727 Bibcode: 1983ApJ...265..813F Keywords: Calcium; Electron Density (Concentration); Interstellar Gas; Interstellar Radiation; Molecular Clouds; Absorption Spectra; Gas Density; Astrophysics full text sources ADS | data products SIMBAD (14)
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