Other
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..147m&link_type=abstract
Astrophysical Journal, Part 1, vol. 228, Feb. 15, 1979, p. 147-158.
Other
43
Absorption Spectra, Abundance, Interstellar Extinction, Interstellar Gas, Ultraviolet Spectra, Electron Energy, H Ii Regions, Hydrogen Atoms, Hydrogen Ions, Ion Distribution, Oao 3, Space Density
Scientific paper
Copernicus scans of selected interstellar absorption lines in the UV spectrum of Gamma Vel are analyzed, together with ground-based data, to obtain column densities for various ion states of C, N, O, Na, Mg, Al, Si, P, S, Cl, Ar, Ca, Mn, Fe, and CO. N I and O I are fitted to a single empirical curve of growth with a velocity parameter (b) of 8 km/s; Mg II, Si II, P II, S II, Mn II, and Fe II are fitted to another curve with b between 3 and 9 km/s. Abundance determinations relative to H I show that: (1) C, N, P, S, and Ar are probably close to their solar values; (2) O may be depleted by about a factor of 2; (3) Mg, Al, Si, Cl, Mn, and Fe are depleted by a factor of 4 or more: (4) Al is depleted by at least a factor of 10 in the H II region; and (5) both N V and O VI are present, but not C IV. The N V/O VI ratio implies that the electron temperature in the H II region is about 275,000 K.
Bhavsar Suketu P.
Morton Donald C.
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