Abstract
The results of over 200 stars measured with interference filters in Hα, Hβ and Hγ are given here. 113 Be stars from the northern and southern hemispheres were included. The comparison of 60 of them, in common with the observations made by Mendoza about 15 years ago, shows that nearly half of them have differences larger than 0ṃ030 in Hβ (Crawford system). On the other hand the comparison with the observations made recently by Crawford indicate variations in a short time for some active Be stars.
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References
Crawford, D. L. and Mander, J.: 1966, Astron. J 71, 114.
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Jaschek, M., Jaschek, C., and Arnal, M.: 1969 Publ. Astron. Soc. Pacific 81, 650.
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Feinstein, A. (1973). Photoelectric Measures of Hα, Hβ and Hγ in Early-Type Stars. In: Fehrenbach, C., Westerlund, B.E. (eds) Spectral Classification and Multicolour Photometry. International Astronomical Union / Union Astronomique Internationale, vol 50. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-2627-7_35
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DOI: https://doi.org/10.1007/978-94-010-2627-7_35
Publisher Name: Springer, Dordrecht
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