Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...256l...9a&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 256, May 1, 1982, p. L9-L12.
Astronomy and Astrophysics
Astrophysics
10
Abundance, Interstellar Matter, Titanium, Absorption Spectra, Ionization Potentials, Line Spectra, Milky Way Galaxy
Scientific paper
The 3384 absorption line of interstellar Ti II has been observed at high resolution along lines of sight toward nine nearly aligned pairs of foreground disk and background halo stars, the latter having z-distance greater than 500 pc. The primary result is the great strength of Ti II absorption perpendicular to the plane of the Galaxy. Compared with the well-studied disk abundances, there is apparently a vertical gradient of titanium depletion above the galactic plane. The gaseous titanium abundance relative to hydrogen increases with z-distance and with LSR velocity by factors exceeding 20 and can reach nearly solar proportions.
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