Abstract
Observations of the Be star HD 50138 have been extended to the photographic infrared region up to 9500 Å. The main features noted in this wavelength range are strong lines of Oi (8446 Å), Hi (from P 9 to P 20), the Caii infrared triplet and the λ8629 line attributed to Ni. The λ7772 multiplet of Oi is shown to undergo important changes during the period of observations (1959–1971). Higher Balmer lines do not exhibit any emission component, but their profiles are variable and indicate the presence of satellite absorption, as already mentioned by some authors.
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Andrillat, Y. et Houziaux, L.: 1972,Astrophys. Space Sci. 15, 236.
Houziaux, L.: 1960,Publ. Obs. Haute Prov. 5, No. 24.
Merrill, P.: 1931,Astrophys. J. 73, 348.
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Les observations ont été obtenues aux télescopes de 120 et 193 cm de l'observatoire de Haute-Provence (CNRS).
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Andrillat, Y., Houziaux, L. Observations spectroscopiques de HD 50138. Astrophys Space Sci 18, 324–328 (1972). https://doi.org/10.1007/BF00645396
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DOI: https://doi.org/10.1007/BF00645396