Interstellar Ca I absorption : J/ApJS/147/61

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Authors : Welty D.E. orcid , Hobbs L.M., Morton D.C. (hide) , Hobbs L.M., Morton D.C. et..al

VizieR DOI : 10.26093/cds/vizier.21470061
Bibcode : 2003ApJS..147...61W (ADS) (Simbad) (Objects)
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CDS Keywords : Interstellar medium; Spectroscopy
UAT : Interstellar medium, Spectroscopy

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Inserted into VizieR : 11-Jun-2005
Last modification : 11-Jun-2005

High-resolution observations of interstellar Ca I absorption. Implications for depletions and electron densities in diffuse clouds. (2003)

Keywords : ISM abundances - ISM: atoms - ISM: kinematics and dynamics - line: profiles

Abstract:We present high-resolution (FWHM~0.3-1.5km/s) spectra, obtained with the AAT UHRF, the McDonald Observatory 2.7m coude spectrograph, and/or the KPNO coude feed, of interstellar Ca I absorption toward 30 Galactic stars. Comparisons of the column densities of Ca I, Ca II, K I, and other species - for individual components identified in the line profiles and also when integrated over entire lines of sight - yield information on relative electron densities and depletions (dependent on assumptions regarding the ionization equilibrium). ...(more)
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