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Light curve variation and period changes of VW Cep

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Abstract

PhotometricUBV-observations of VW Cep, a W UMa-type eclipsing binary, were made in 1971 and 1978–79. The (O-C)-diagram, with the newly determined times of minima extended, shows sudden increases and decreases in the period of VW Cep. The difference light curves (the observed light curves compared with a reference light curve) show some correlations with the sudden change of the period. In particular, the difference between the two light curves from 1971 and 1978 is also presented. The system may be in marginal contact, and as such is possibly unstable with respect to mass exchange between its components. In accordance with the variation of (O-C)-values the mass transfer between the both components is discussed. The difference between the depths of the two minima shows irregular changes, while that between the heights of the two maxima shows a long term variation on which irregular fluctuations are superimposed.

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References

  • Anderson, L. and Shu, F. H.: 1979,Astrophys. J. Suppl. 40, 667.

    Google Scholar 

  • Anderson, L., Raff, M., and Shu, F. H.: 1980,IAU Suppl. 88, 485.

    Google Scholar 

  • Batten, A. H.: 1973,Binary and Multiple Systems of Stars, Pergamon Press, Oxford.

    Google Scholar 

  • Breinhorst, R. A.: 1978,Acta Astron. 28, 579.

    Google Scholar 

  • Breinhorst, R. A., Pfleiderer, J., Reinhardt, M., and Karimie, M. T.: 1973,Astron. Astrophys. 22, 239.

    Google Scholar 

  • Cester, B.: 1961,Trieste Astron. Obs. Publ., No. 302.

  • Cester, B.: 1966,Trieste Astron. Obs. Publ., No. 374.

  • Detre, L. and Kanyo, S.: 1961,Mitt. Stern. Ungar. Akad. Wiss., No. 49.

  • Duerbeck, H. W.: 1978,Astron. Astrophys. Suppl. 32, 361.

    Google Scholar 

  • Gieseking, F.: 1981,Astron. Astrophys. Suppl. 43, 33.

    Google Scholar 

  • Guinan, E. F. and Weisenberger, A. G.: 1980,Inf. Bull. Var. Stars, No. 1856.

  • Herczeg, T.: 1969,Mass Loss from Stars, D. Reidel Publ. Co., Dordrecht, Holland, pp. 213–214.

    Google Scholar 

  • Herczeg, T. and Schmidt, H.: 1960,Veröffentl. Univ. Stern. Bonn, No. 57.

  • Hershey, J. L.: 1975,Astron. J. 80, 662.

    Google Scholar 

  • Hopp, U., Witizigmann, S., and Kiehl, M.: 1979,Inf. Bull. Var. Stars, No. 1599.

  • Kreiner, J. M.: 1977,Veröffentl. Remeis-Sternw. Bamberg 11, 393.

    Google Scholar 

  • Kwee, K. K.: 1966a,Bull. Astron. Inst. Neth. 18, 448.

    Google Scholar 

  • Kwee, K. K.: 1966b,Bull. Astron. Inst. Neth. Suppl. 1, 245.

    Google Scholar 

  • Kwee, K. K.: 1966c,Bull. Astron. Inst. Neth. Suppl. 1, 265.

    Google Scholar 

  • Linnell, A. P.: 1980,Publ. Astron. Soc. Pacific 92, 202.

    Google Scholar 

  • Linnell, A. P.: 1980b,IAU Symp. 88, 381.

    Google Scholar 

  • Lucy, L. B.: 1973,Astrophys. Space Sci. 22, 381.

    Google Scholar 

  • Lucy, L. B.: 1976,Astrophys. J. 205, 208.

    Google Scholar 

  • Lunel, M., Roux, S., and Bergeat, J.: 1980,Inf. Bull. Var. Stars, No. 1856.

  • Mochnacki, S. W.: 1981,Astrophys. J. 245, 650.

    Google Scholar 

  • Pustylnik, I. and Sorgsepp, L.: 1976,Acta Astron. 26, 319.

    Google Scholar 

  • Robertson, J. A. and Eggleton, P. P.: 1977,Monthly Notices Roy. Astron. Soc. 179, 359.

    Google Scholar 

  • Rossati, F.: 1965,Mem. Soc. Astron. Ital. 36, 109.

    Google Scholar 

  • Rucinski, S. M.: 1973,Acta Astron. 23, 79.

    Google Scholar 

  • Schmidt, H. and Schrick, K. W.: 1955,Z. Astrophys. 37, 73.

    Google Scholar 

  • Sorgsepp, L. and Albo, H.: 1974,Publ. Astrophys. Obs. Tartu 42, 103.

    Google Scholar 

  • Tempesti, P. and De Carlo, R.: 1972,Mem. Soc. Astron. Ital. 43, 1.

    Google Scholar 

  • van't Veer, F.: 1972,Astron. Astrophys. 20, 131.

    Google Scholar 

  • van't Veer, F.: 1973,Astron. Astrophys. 26, 357.

    Google Scholar 

  • Yamasaki, A.: 1982,Astrophys. Space Sci. 85, 43.

    Google Scholar 

References of minimum times of VW Cep after Tempesti and De Carlo's paper 1972

  • Muthsam, H.: 1972,Inf. Bull. Var. Stars, No. 631.

  • Pohl, E. and Kizilirmak, A.: 1972,Inf. Bull. Var. Stars, No. 647.

  • Scarfe, C. D., Niehaus, R. J., Barlow, D. J., and Baldwin, B. W.: 1973,Inf. Bull. Var. Stars, No. 844.

  • Kizilirmak, A. and Pohl, E.: 1974,Inf. Bull. Var. Stars, No. 937.

  • Pohl, E. and Kizilirmak, A.: 1975,Inf. Bull. Var. Stars, No. 1053.

  • Patkos, L.: 1975,Inf. Bull. Var. Stars, No. 1065.

  • Brancewicz, H. and Kreiner, J. M.: 1976,Inf. Bull. Var. Stars, No. 1119.

  • Baldinelli, L. and Ghedini, S.: 1976,Inf. Bull. Var. Stars, No. 1143.

  • Pohl, E. and Kizilirmak, A.: 1976,Inf. Bull. Var. Stars, No. 1163.

  • Pohl, E. and Kizilirmak, A.: 1977,Inf. Bull. Var. Stars, No. 1358.

  • Scarfe, C. D. and Barlow, D. J.: 1978,Inf. Bull. Var. Stars, No. 1379.

  • Cristescu, C.: 1978,Inf. Bull. Var. Stars, No. 1383.

  • Ebersberger, J., Pohl, E., and Kizilirmak, A.: 1978,Inf. Bull. Var. Stars, No. 1449.

  • Niarchos, P. G.: 1979,Inf. Bull. Var. Stars, No. 1576.

  • Cristescu, C., Oprescu, G., and Suran, M. D.: 1979,Inf. Bull. Var. Stars, No. 1589.

  • Hopp, U., Witzigmann, S., and Kiehl, M.: 1979,Inf. Bull. Var. Stars, No. 1599.

  • Lunel, M., Roux, S., and Bergeat, J.: 1979,Inf. Bull. Var. Stars, No. 1670.

  • Niarchos, P. G.: 1980,Inf. Bull. Var. Stars, No. 1729.

  • Rovithis, P. and Rovithis-Livaniou, H.: 1980,Inf. Bull. Var. Stars, No. 1736.

  • Guinan, E. F. and Weisenberger, A. G.: 1980,Inf. Bull. Var. Stars, No. 1756.

  • Guinan, E. F., Najafi, S. I., and Zamani-Noor, F.: 1980,Inf. Bull. Var. Stars, No. 1850.

  • Pohl, E. and Gülmen, Ö.: 1981,Inf. Bull. Var. Stars, No. 1924.

  • Niarchos, P. G.: 1981,Inf. Bull. Var. Stars, No. 1962.

  • Linnell, A. P.: 1981,Inf. Bull. Var. Stars, No. 1967.

  • Abe, T.: 1982,Inf. Bull. Var. Stars, No. 2108.

  • Mahdy, H. A. and Soliman, M. A.: 1982,Inf. Bull. Var. Stars, No. 2153.

  • Lunel, M., Garnier, R., and Bergeat, J.: 1982,Inf. Bull. Var. Stars, No. 2176.

  • Locher, K.: 1972,BBSAG 1, 2, 3, 4, 5.

  • Locher, K.: 1973,BBSAG 7, 8, 9, 10, 11, 12.

  • Locher, K.: 1974,BBSAG 13, 14, 15, 16, 17, 18.

  • Locher, K.: 1975,BBSAG 19, 20, 21, 22, 23, 24.

  • Locher, K.: 1976,BBSAG 25, 26, 27, 28, 29, 30.

  • Locher, K.: 1977,BBSAG 31.

  • Locher, K.: 1971,Orion 124, 126, 127.

    Google Scholar 

  • Locher, K.: 1972,Orion 129

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  1. Universitäts-Sternwarte Bonn, Bonn, Germany

    M. T. Karimie

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Karimie, M.T. Light curve variation and period changes of VW Cep. Astrophys Space Sci 92, 53–98 (1983). https://doi.org/10.1007/BF00653588

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  • DOI: https://doi.org/10.1007/BF00653588

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