Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-23T21:03:49.375Z Has data issue: false hasContentIssue false

UBV Photometry of the Massive Eclipsing Binary TT Aur

Published online by Cambridge University Press:  05 March 2013

S. Özdemir
Affiliation:
Çanakkale Onsekiz Mart University, Department of Physics, Çanakkale-Turkey; [email protected]
H. Ak
Affiliation:
Ankara University Observatory, Tando¢gan, Ankara-Turkey
M. Tanriver
Affiliation:
Ankara University Observatory, Tando¢gan, Ankara-Turkey
H. Gülseçen
Affiliation:
ÿIstanbul University Observatory, Üniversite, ÿIstanbul-Turkey
S. Gülseçen
Affiliation:
ÿIstanbul University Observatory, Üniversite, ÿIstanbul-Turkey
A. T. Saygaç
Affiliation:
ÿIstanbul University Observatory, Üniversite, ÿIstanbul-Turkey
E. Budding
Affiliation:
Central Institute of Technology, PO Box 40740, Upper Hutt, New Zealand Carter Observatory, P.O. Box 2909, Wellington, New Zealand
O. Demircan
Affiliation:
Çanakkale Onsekiz Mart University, Department of Physics, Çanakkale-Turkey; [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

UBV observations of the massive binary system TT Aur were carried out mainly at theTurkish National Observatory (TUG). These observations, together with IUE spectra and times of eclipse minima collected from the literature, were used to study the system parameters.

Simultaneous solution of the light curves by the Wilson-Devinney code allows a semi-detached configuration with a slightly larger Roche-lobe filling secondary. This picture is supported by other evidence. The shoulders of the primary minimum suggest some excess absorption, in keeping with circumstellar material in the form of a disk-like structure around the primary component. The deeper primary minimum in the U filter may indicate a hotter region on the secondary-facing hemisphere of the primary.

The period variation of the system can also be related to the possible existence of a third component in a circular orbit around the system.

An alternative detached representation is also considered using optimal curve-fitting techniques. We appeal for further observations to help resolve some outstanding issues in this interesting massive binary.

Type
Research Article
Copyright
Copyright © Astronomical Society of Australia 2001

References

Ak, H. 1997, IBVS, No 4475Google Scholar
Bell, S. A., & Hilditch, R. W. 1984, MNRAS, 211, 229 CrossRefGoogle Scholar
Bell, S. A., Adamson, A. J., & Hilditch, R. W. 1987, MNRAS, 224, 649 CrossRefGoogle Scholar
Budding, E. 1993, Introduction to Astronomical Photometry, (Cambridge: Cambridge University Press)Google Scholar
Budding, E., & Najim, N. N. 1980, Ap&SS, 72, 369 Google Scholar
Bradstreet, D. H. 1993, Binary Maker 2.0 User Manual, (Norristown, PA: Contact Software), 19401–5505.Google Scholar
Drechsel, H., Haas, S., Lorenz, R., & Gayler, S. 1995, A&A, 294, 723 Google Scholar
Figueiredo, J., de Greve, J. P., & Hilditch, R. W. 1994, A&A, 283, 144 Google Scholar
Hilditch, R. W., & Hill, G. 1975, MNRAS, 79, 101 Google Scholar
Jordan, F. C. 1929, Publ. Allegeny Obs., 7, 177 Google Scholar
Joy, A. H., & Sitterley, B. W. 1931, ApJ, 73, 77 Google Scholar
Keskin, V. 1996, Ege University Observatory (unpublished)Google Scholar
Kreiner, J. 1978, Acta Astron., 28, 497 Google Scholar
Kwee, K. K., & van Woerden, H. 1956, Bull. Astron. Inst. Netherland, 12, 327 Google Scholar
Leavitt, H. 1907, Harvard Circ., No 30Google Scholar
Martin, C., & Plummer, H. C. 1916, MNRAS, 76, 395 CrossRefGoogle Scholar
Mazzali, P. A., Pauldrach, A. W. A., Puls, J., & Plavec, M. J. 1992, A&A, 254, 241 Google Scholar
Murad, I. M., & Budding, E. 1984, The Observatory, 104, 83 Google Scholar
Muyesseroǧlu, Z. 1992, Ankara University Observatory (unpublished)Google Scholar
Pearson, E. S., & Hartley, H. O. 1954, Biometrika tables for statisticians I, (Cambridge: Cambridge University Press)Google Scholar
Plavec, M. J. 1989, in Algols, ed. A. Batten (Kluwer), p. 95 Google Scholar
Popper, D. M. 1980, ARA&A, 18, 115 Google Scholar
Popper, D. M., & Hill, G. 1991, AJ, 101, 600 Google Scholar
Simon, V. 1999, A&AS, 134, 1 Google Scholar
Tout, C. A., & Eggleton, P. P. 1988, ApJ, 334, 357 Google Scholar
Wachmann, A. A., Popper, D. M., & Clausen, J. V. 1986, A&A, 162, 62 Google Scholar
Wade, R. R., & Rucinski, S. M. 1985, A&AS, 60, 471 Google Scholar
Wilson, R. E. 1993, in Astron. Conf. Pac. Ser., 38, New Frontiers in Interacting Binary Star Research, ed. K. C. Leung p. 91 Google Scholar
Wilson, R. E., & Devinney, E. J. 1971, ApJ, 166, 605 CrossRefGoogle Scholar