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IUE observations of N V, a diagnostic of hot interstellar gas
Smith, L. J.; Hartquist, T. W.
The paper reports IUE observations of interstellar N V toward a number of Wolf-Rayet stars and compares the derived number density with that predicted by one theory of the interstellar medium. The observed N V/O VI ratio implies that most of the hot gas in the interstellar medium is at T about 2.3 x 10 to the 5th K.
A search for absorption in the fourth positive system of CO in the spectrum of the planetary nebula IC 418.
Clavel, J.; Flower, D. R.
The continuous emission of IC 418 has been observed at high dispersion with the IUE satellite and the spectrum searched for the A1Π-&Chi1Σ+ bands of CO. It was not possible to unequivocally detect these CO bands in IC 418. However, an upper limit to the absorption by CO was determined, giving a column density w…