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HD 219198


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Galactic interstellar abundance surveys with IUE. III - Silicon, manganese, iron, sulfur, and zinc
This paper continues a survey of intestellar densities, abundances, andcloud structure in the Galaxy using the IUE satellite. A statisticaldata set of 223 O3-B2.5 stars is constructed, including 53 stars in theGalactic halo. It is found that S II lines in B stars, of luminosityclasses IV and V, have possible contamination from stellar S II,particular for stars with v sin i less than 200 km/s. The meanlogarithmic 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 hydrogendensity n-bar along the line of sight, with a turnover for n-bar greaterthan 1/cm. Sulfur depletions correlate with n-bar along the line ofsight. The slight Zn depletion correlation also appears to bestatistically insignificant. No correlation of depletion is found withthe physical density derived from H2 rotational states in 21 lines ofsight. Depletion variations in the disk are consistent with a Galacticabundance gradient or with enhanced mean depletions in the anticenterregion.

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Observation and Astrometry data

Constellation:Ιχθείς
Right ascension:23h14m04.14s
Declination:+03°18'36.1"
Apparent magnitude:9.056
Distance:578.035 parsecs
Proper motion RA:21.1
Proper motion Dec:-6.4
B-T magnitude:10.407
V-T magnitude:9.168

Catalogs and designations:
Proper Names
HD 1989HD 219198
TYCHO-2 2000TYC 580-1587-1
USNO-A2.0USNO-A2 0900-20351894
HIPHIP 114696

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