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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
Article

Abstract

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.

Keywords

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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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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