Astrophysics and Space Science

, Volume 100, Issue 1–2, pp 117–127 | Cite as

An attempt to understand RT Sculptoris

  • J. B. Rafert
  • R. E. Wilson


The metal-deficient star RT Sculptoris is a rare binary showing a secularlydecreasing period, probably due to mass transfer from the more to the less massive component. The somewhat difficult photometric solution indicates a semi-detached configuration with one star only very slightly smaller than its limiting lobe. Probably it is the more massive and lower temperature star which fills its lobe. The photometric solution for the mass ratio (q) is especially troublesome, as there are at least two (nearly equally deep) minima in parameter space-one atq=1.10 and another atq=1.67. The few existing radial velocity observations are inadequate for a determination of the mass ratio, but do point to absolute masses which are about half of those expected. We look into the question of whether this result can be understood in terms of low metallicity, and conclude that a significant part of the discrepancy can be so explained. The remainder could be due to accretion luminosity and to evolution. Some comments are made in regard to whether RT Sculptoris is likely to evolve into a contact system.


Mass Transfer Radial Velocity Significant Part Contact System Massive Component 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Abt, H. A.: 1970,Astrophys. J. Suppl. 19, 387.Google Scholar
  2. Allen, C. W.: 1973,Astrophysical Quantities, 3rd edition, Athlone Press, London.Google Scholar
  3. Baker, N. H. and Kippenhahn, R.: 1962,Z. Astrophys. 54, 114.Google Scholar
  4. Baker, N. H. and Temesvary, S.: 1966,Tables of Convective Stellar Envelope Models, NASA Goddard Institute for Space Studies, New York.Google Scholar
  5. Bookmyer, B. B.: 1966,Astron. J. 71, 1012.Google Scholar
  6. Christy, R. F.: 1966,Astrophys. J. 144, 108 (Appendix).Google Scholar
  7. Cillié, C. G. and Lindsay, E. M.: 1958,Monthly Notices Roy. Astron. Soc. 118 585.Google Scholar
  8. Clausen, J. V. and Gronbech, B.: 1977,Astron. Astrophys. Suppl. Ser. 28, 389.Google Scholar
  9. Duerbeck, H. W. and Karamie, M. T.: 1979,Inf. Bull. Var. Stars, No. 1617.Google Scholar
  10. Dugan, R. S.: 1928,Contr. Princeton Univ. Obs. 8, 11.Google Scholar
  11. Flannery, B. P.: 1976,Astrophys. J. 205, 217.Google Scholar
  12. Harmanec, P.: 1970,Bull. Astron. Inst. Czech. 21, 316.Google Scholar
  13. Henyey, L. G., LeLevier, R. and Levee, R. D.: 1959,Astrophys. J. 129, 2.Google Scholar
  14. Jakate, S., Bakos, G. A., Fernie, J. D., and Heard, J. F.: 1976,Astron. J. 81, 250.Google Scholar
  15. Lucy, L. B.: 1976,Astrophys. J. 205, 208.Google Scholar
  16. Mengel, J. G., Sweigart, A. V., Demarque, P., and Gross, P. G.: 1979,Astrophys. J. Suppl. Ser. 40 733.Google Scholar
  17. Ramsey, L. W. and Nations, H. L.: 1981,Publ. Astron. Soc. Pacific 93, 732.Google Scholar
  18. Reeves, H.: 1965, in L. H. Aller and D. B. McLaughlin (eds.),Stellar Structure, University of Chicago Press, Chicago, p. 113.Google Scholar
  19. Rodgers, A. W.: 1972,Monthly Notices Roy. Astron. Soc. 157, 171.Google Scholar
  20. Tümer, O., Kurutac, Z., Tunca, Z., Evren, S., Ertan, Y., and Ibanoglu, C.: 1980,Inf. Bull. Var. Stars, No. 1741.Google Scholar
  21. Webbink, R. F.: 1976,Astrophys. J. Suppl. Ser 32, 583.Google Scholar
  22. Weiler, E.: 1978,Monthly Notices Roy. Astron. Soc. 182, 77.Google Scholar
  23. Wilson, R. E. and Biermann, P.: 1976,Astron. Astrophys. 48, 349.Google Scholar
  24. Wilson, R. E., and Devinney, E. J.: 1971,Astrophys. J. 166, 605.Google Scholar
  25. Wilson, R. E. and Starr, T. C.: 1976,Monthly Notices Roy. Astron. Soc. 176, 625.Google Scholar

Copyright information

© D. Reidel Publishing Company 1984

Authors and Affiliations

  • J. B. Rafert
    • 1
    • 2
  • R. E. Wilson
    • 2
    • 3
  1. 1.Department of PhysicsStephen F. Austin State UniversityUSA
  2. 2.Department of Physics and AstronomyAppalachian State UniversityUSA
  3. 3.Department of AstronomyUniversity of FloridaUSA

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