Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...257..135m&link_type=abstract
Astrophysical Journal, Part 1, vol. 257, June 1, 1982, p. 135-144.
Astronomy and Astrophysics
Astronomy
18
Hydrogen, Interstellar Gas, Interstellar Matter, Line Of Sight, Line Spectra, Ultraviolet Spectra, Abundance, Electron Density (Concentration), Gas Density, Gas Temperature, Neutral Gases, Stellar Spectra, Ultraviolet Astronomy, Ultraviolet Spectrometers
Scientific paper
Various interstellar lines toward Epsilon Persei and Delta Persei have been analyzed using a procedure intended to give hydrogen column densities as a function of velocity for each line of sight. For each star one dominant velocity component is found which has a velocity near zero in the local standard of rest, a large depletion of Ca and Ti, a low molecular hydrogen excitation temperature, and a large hydrogen volume density. Both stars have several other velocity components, which, relative to the dominant component, have higher LSR velocities and less Ca and Ti depletion. One component toward each star is probably composed mostly of ionized material. The electron density appears to be about 0.01 per cu cm, approximately independent of velocity. Cloud-to-cloud abundance fluctuations of a factor about five are found.
Martin Eric R.
York Don G.
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