Abstract
SIGMA Orionis E, the first He-rich B star discovered1,2, was recently found3,4 to have an extremely broad (∼1,800 km s−1), rapidly varying Hα-emission feature. From independent spectroscopic, spectrophotometric, and photometric observations on 4 consecutive nights in December 1974, we have shown4 that it is a variable, with P ≃ 1.19 d; however, incomplete phase coverage in those data, as well as uncertainty about the nature of the periodicity, has hampered the development of a model to account for the wealth of observed phenomena. Here we briefly communicate results of new continuous uvbyβ photometry carried out during the 11 consecutive nights December 28, 1975–January 7, 1976 (UT), together with some possible interpretations.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Berger, J., C. Inst. Astrophys Paris, A 217 (1956).
Greenstein, J. L., and Wallerstein, G., Astrophys. J., 127, 237 (1958).
Walborn, N. R., Astrophys. J. Lett., 191, L95 (1974).
Walborn, N. R., and Hesser, J. E., Astrophys. J. Lett., 205, L87 (1976).
Crawford, D. L., and Barnes, J. V., Astr. J., 75, 978 (1970).
Crawford, D. L., and Mander, J. V., Astr. J., 71, 114 (1966).
Hesser, J. E., and Ugarte, P., IAU Circ., No. 2911 (1976).
Kraft, R. P., Astrophys. J., 135, 408 (1962).
Krzeminski, W., Astrophys. J., 142, 1051 (1965).
Smak, J., Acta Astr., 19, 287 (1969).
Warner, B., and Nather, E., Mon. Not. R. astr. Soc., 152, 219 (1971).
Lin, D. N. C., Mon. Not. R. astr. Soc., 170, 379 (1975).
Thomsen, B., Astr. Astrophys., 35, 479, (1974).
Bolton, C. T., Astrophys. J. Lett., 192, L7 (1974).
Hesser, J. E., and Lasker, B. M., in Proc. of IAU Colloq., 15; Veröff. der Remeis Sternwarte Bamberg, 9, 1960 (1971).
Guinan, E. F., McCook, G. P., Bachmann, P. J., and Bistline, W. G., Astr. J., 81, 57 (1976).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
HESSER, J., WALBORN, N. & PATRICIO, U. Sigma Orionis E as a mass-transfer binary system. Nature 262, 116–118 (1976). https://doi.org/10.1038/262116a0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1038/262116a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
