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Theoretical line profiles in the ultraviolet spectra of early B-type stars

  • Donald C. Morton (a1)

Abstract

The blended profiles of 106 ultraviolet lines, including all those expected to have equivalent widths greater than 2 Å in the wavelength range 911,6 to 3000 Å, have been computed for Bz V and B0 V model atmospheres. Most of the lines are found shortward of 1410 Å, where they have deep cores and many have extensive wings. This blanketing amounts to 31% at Bz V and 20 % at B0 V.

On a calculé les profils de 106 raies U. V. de longueurs d'onde comprises entre 911,6 ei 3000 Å, у compris celles de largeur équivalente supérieure à 2 Å et cela pour des modèles d'atmosphere Bz V et B0 V. La plupart des raies se situent dans la région de longueur d'onde inférieure à 1410 Å : elles présentent une absorption centrale et beaucoup ont des ailes tres étendues.

Резюме

Вычислены контуры 106 ультрафиолетовых линий с длиной волн заключенной между 911,6 и 3000 Å, включая и те эквивалентная ширина которых превышает 2 Å для атмосферных моделей Bz V и В0 V. Большинство линий расположено в области длины волн меньше 1410 Å; они выявляют наличие сильного центрального поглощения и многие имеют очень распростерты крылья.

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References

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Gaustad, J. E. and Spitzer, L. S., 1961, Ap. J., 134, 771
Griem, H. R., 1960, Ap. J., 132, 883.
Underhill, A. B., 1962a, Publ. Dom. Astrophys. Obs., 11, 433; 1962b, Publ. Dom. Astrophys. Obs., 11, 467.

Theoretical line profiles in the ultraviolet spectra of early B-type stars

  • Donald C. Morton (a1)

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