Galactic interstellar abundance surveys with IUE. III. Silicon, manganese, iron, sulfur, and zinc

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166525· OSTI ID:6740904

Van Steenberg, M E; Shull, J M

This paper continues a survey of intestellar densities, abundances, and cloud structure in the Galaxy using the IUE satellite. A statistical data set of 223 O3-B2.5 stars is constructed, including 53 stars in the Galactic halo. It is found that S II lines in B stars, of luminosity classes IV and V, have possible contamination from stellar S II, particular for stars with v sin i less than 200 km/s. The mean logarithmic depletions are -1.00, -1.19. -0.63, and -0.23 (Si, Mn,Fe,S, Zn). Depletions of Si, Mn, and Fe correlate with the mean hydrogen density n-bar along the line of sight, with a turnover for n-bar greater than 1/cm. Sulfur depletions correlate with n-bar along the line of sight. The slight Zn depletion correlation also appears to be statistically insignificant. No correlation of depletion is found with the physical density derived from H2 rotational states in 21 lines of sight. Depletion variations in the disk are consistent with a Galactic abundance gradient or with enhanced mean depletions in the anticenter region. 54 references.

• Research Organization: Joint Institute for Laboratory Astrophysics, Boulder, CO (USA)
• OSTI ID: 6740904
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 330; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CHEMICAL COMPOSITION
COSMIC GASES
DENSITY
ELEMENTS
FLUIDS
GALAXIES
GASES
INTERSTELLAR SPACE
IRON
MANGANESE
MATHEMATICS
METALS
MILKY WAY
MORPHOLOGY
NONMETALS
PHYSICAL PROPERTIES
SATELLITES
SEMIMETALS
SILICON
SPACE
SPECTRA
STARS
STATISTICS
SULFUR
TRANSITION ELEMENTS
ULTRAVIOLET SPECTRA
VARIATIONS
ZINC