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On the Ultraviolet Photometric Variability of the Helium-Weak B Stars (From ANS Data)

Published online by Cambridge University Press:  12 April 2016

E.I. Želwanowa  and
W. Sohöneich
E.I. Želwanowa
Affiliation:
Zentralinstitut für Astrophysik der AdW der DDR15 Potsdam, Rosa-Luxemburg-Str. 17A, GDR
W. Sohöneich
Affiliation:
Zentralinstitut für Astrophysik der AdW der DDR15 Potsdam, Rosa-Luxemburg-Str. 17A, GDR

Abstract

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Photometric observations in the ultraviolet region obtained by the ANS satellite enabled us: to confirm with a slight improvement the rotational period of HD 22470 (UV lightcurves of HD 22470 compared with u and magnetic curves are shown in fig. 1); to confirm the variability with very small amplitudes for HD 74196, a member of the open cluster IC 2391 (Fig. 2)

to compare the amplitude-wavelength relations of some other He-weak stars with known periods (HD 35298, HD 142884, HD 144334, HD 175362, and HD 109026). A preliminary rotational period for the star HD 109026 using the 11 ANS observations was found to be about 1.5 days.

Type
Section III - Magnetic CP Stars
Information
International Astronomical Union Colloquium , Volume 90: Upper Main Sequence Stars with Anomalous Abundances , 1986 , pp. 271 - 274
Copyright
Copyright © Reidel 1986

References

Borra, E.F., Landstreet, J.D., and Thompson, I., 1983, Astrophys. J. Suppl. Ser., 53, 151 Google Scholar
Buscombe, W., 1965, Mon.Not.R.A.S., 129, 411 Google Scholar
Jakate, S.M., 1979, Inf.Bull.Var.Stars, 1536 Google Scholar
Mathys, G. and Manfroid, J., 1984, Preprint, submitted to Astron. Astrophys. Suppl. Ser.Google Scholar
Molnar, M.R., 1974, Astrophys. J., 187, 531.Google Scholar
Renson, P., and Manfroid, J., 1981, Astron. Astrophys. Suppl. Ser., 44, 23.Google Scholar
Schöneich, W., Zelwanowa, E., and Jamar, C., 1983,unpublishedGoogle Scholar
Schöneich, W., 1984, unpublishedGoogle Scholar
Uesugi, A., and Pukuda, I., 1982, Revised Catalogue of stell, rotational velocities, Kyoto Univ., Japan Google Scholar
Wesselius, P.R., van Duinen, R.J., de Jonge, A.R.W., Aalders, J.W.G., Luinge, W., and Wildeman, K.J., 1982, Astron. Astrophys. Suppl. Ser., 49, 427.Google Scholar