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UV Spectroscopy of the Novalike Variable TT Arietis

Published online by Cambridge University Press:  12 April 2016

W. Wargau ,
H. Drechsel ,
J. Rahe ,
G. Klare ,
B. Wolf ,
J. Krautter  and
N. Vogt
W. Wargau
Affiliation:
Remeis-Sternwarte Bamberg, Astronomisches Institut Universität Erlangen-Nürnberg / F.R.G.
H. Drechsel
Affiliation:
Remeis-Sternwarte Bamberg, Astronomisches Institut Universität Erlangen-Nürnberg / F.R.G.
J. Rahe
Affiliation:
Remeis-Sternwarte Bamberg, Astronomisches Institut Universität Erlangen-Nürnberg / F.R.G.
G. Klare
Affiliation:
Landessternwarte Heidelberg / F.R.G.
B. Wolf
Affiliation:
Landessternwarte Heidelberg / F.R.G.
J. Krautter
Affiliation:
European Southern Observatory, 8046 Garching bei München / F.R.G.
N. Vogt
Affiliation:
Institut für Astronomie und Astrophysik der Universität München, Universitäts-Sternwarte / F.R.G.

Extract

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TT Ari was detected by Strohmeier et al. (1957) and is classified as a novalike variable. It was hitherto unclear whether TT Ari is a special type of dwarf nova (Warner, 1976) or an old nova (Cowley et al., 1975). Our group obtained a total of four IUE spectra between 1979 and 1981 in the short and long wavelength region. The first spectrum was taken in July 1979, when the system had a visual brightness of 11.3 magnitudes. The following two IUE observations in November 1980 revealed TT Ari in the lowest optical state (V = 14m.3) observed so far. The fourth spectrum was obtained during the rise to maximum in January 1981, when the system had an apparent magnitude of V = 11m.8. From this behavior, Krautter et al. (1981) concluded that TT Ari is a dwarf nova with extremely extended standstills as they are typical for Z Cam stars.

Type
Part IV: Cataclysmic Binaries and their Role in Stellar Evolution
Information
International Astronomical Union Colloquium , Volume 69: Binary and Multiple Stars as Tracers of Stellar Evolution , 1982 , pp. 453 - 454
Copyright
Copyright © Reidel 1982

References

REFERENCES

Cowley, A.P., Crampton, D., Hutchings, J.B., Marlborough, J.M.: 1975, Astrophys. J. 195, 413 Google Scholar
Duerbeck, H.W., Klare, G., Krautter, J., Wolf, B., Seitter, W.C., Wargau, W.: 1980, Proc. “Second European IUE Conference”, Tübingen, 26-28 March 1980, ESA SP-157, 91 Google Scholar
Krautter, J., Klare, G., Wolf, B., Wargau, W., Drechsel, H., Rahe, J. , Vogt, N.: 1981, Astron. Astrophys. 98, 27 Google Scholar
Strohmeier, W., Kippenhahn, R., Geyer, E.: 1957, Kl.Veröff.Sternwarte Bamberg Nr. 18 Google Scholar
Warner, B.: 1976, in “Structure and Evolution of Close Binary Systems”, IAU-Symp. No. 73, eds. Eggleton, P. et al. (Dordrecht: Reidel Publ.), 85 Google Scholar