Chemical Composition of M8 Based on IUE and Visual Observations

Details Chemical Composition of M8 Based on IUE and Visual Observations Chemical Composition of M8 Based on IUE and Visual Observations

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...418..760p&link_type=abstract

Astrophysical Journal v.418, p.760

Astronomy and Astrophysics

Astronomy

41

Ism: Abundances, Ism: Individual Messier Number: M8, Ism: H Ii Regions, Ultraviolet: Interstellar

Scientific paper

We present optical and IUE observations of the Hourglass Nebula which is embedded in the galactic H II region M8. By comparing the intensities of the [C III] lines λλ1907 + 1909 with that of C II λ4267, a value of t2 = 0.046±0.01 is obtained. The logarithmic abundances by number of the gaseous component for t2 = 0.046 are: H = 12.00, He = 11.00 C = 8.55, N = 7.80, 0 = 8.74, Ne = 7.99, S = 7.38, Ar = 6.76, and Fe = 6.16. These abundances are compared with those of other galactic H II regions, the Sun, and B stars of the solar neighborhood.

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