Advertisement

Spectroscopic Segregation in Binary Systems

  • Jon Darius

Abstract

Binary systems displaying spectroscopic segregation, whereby line spectra of the two components overlap little or not at all in wavelength, account for a small subset of LUV objects (late-type ultraviolet). Optical and ultraviolet (IUE) spectra for one such system, HD 15351 + UV0225 + 13 (F4-5 V + sdO), are presented and a few related systems described. The role of LUV objects in establishing an absolute luminosity calibration for hot subdwarfs is emphasized, along with their significance for stellar evolution. A search strategy for additional spectroscopically segregated LUV objects is outlined.

Keywords

Binary System Spectral Type Monthly Notice Cool Primary International Ultraviolet Explorer 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Allen, C. W.: 1973, Astrophysical Quantities, 3rd ed., Athlone Press, London.Google Scholar
  2. Barbier, R., Dossin, F., Jaschek, C., Jaschek, M., Klutz, M., Swings, J. P., and Vreux, J. M.: 1978, Astron. Astrophys. 66, L9.ADSGoogle Scholar
  3. Berger, J. and Fringant, A.-M: 1980, Astron. Astrophys. 85, 367.ADSGoogle Scholar
  4. Darius, J. and Whitelock, P. A.: 1978, Nature 275, 428.ADSCrossRefGoogle Scholar
  5. Davis, R. J., Deutschman, W. A., and Haramundanis, K.: 1973, Celescope Catalog of Ultraviolet Stellar Observations, Smithsonian Institution Press, Washington, D.C.Google Scholar
  6. Doyle, A. C.: 1890, The Sign of Four, Spencer Blackett, London.Google Scholar
  7. Dworetsky, M. M., Lanning, H. H., Etzel, P. B., and Patenaude, D. J.: 1977, Monthly Notices Roy. Astron. Soc. 181, 13P.ADSGoogle Scholar
  8. Gilra, D. P., Wesselius, P. R., and Rao, N. K.: 1980, Proceedings of Second European IUE Conference, ESA SP-157, p. 227.Google Scholar
  9. Goy, G.: 1977, Astron. Astrophys. 57, 449.ADSGoogle Scholar
  10. Goy, G.: 1980, Astron. Astrophys. 88, 370.ADSGoogle Scholar
  11. Greenstein, J. L. and Sargent, A. I.: 1974, Astrophys. J. Suppl. 28, 157.ADSCrossRefGoogle Scholar
  12. Houk, N.: 1978, University of Michigan Catalogue of Two-Dimensional Spectral Types for the HD Stars, Vol. 2, Department of Astronomy, University of Michigan, Ann Arbor.Google Scholar
  13. Houk, N. and Cowley, A. P.: 1975, University of Michigan Catalogue of Two-Dimensional Spectral Types for the HD Stars, Vol. 1, Department of Astronomy, University of Michigan, Ann Arbor.Google Scholar
  14. Jaschek, M. and Jaschek, C.: 1980, Astron. Astrophys. Suppl. 42, 115.ADSGoogle Scholar
  15. Kilkenny, D., Hilditch, R. W., and Penfold, J. E.: 1978, Monthly Notices Roy. Astron. Soc. 183, 523.ADSGoogle Scholar
  16. Kilkenny, D., Hill, P. W., and Penfold, J. E.: 1981, Monthly Notices Roy. Astron. Soc. 194, 429.ADSGoogle Scholar
  17. Mikami, T.: 1978, Publ. Astron. Soc. Japan 30, 207.ADSGoogle Scholar
  18. Parsons, S. B., Wray, J. D., Kondo, Y., Henize, K. G., and Benedict, G. F.: 1976, Astrophys. J. 203, 435.ADSCrossRefGoogle Scholar
  19. Stickland, D. J. and Harmer, D. L.: 1978, Astron. Astrophys. 70, L53.ADSGoogle Scholar
  20. Thompson, G. I., Nandy, K., Jamar, C., Monfils, A., Houziaux, L., Carnochan, D. J., and Wilson, R.: 1978, Catalogue of Stellar Ultraviolet Fluxes, Science Research Council, U.K.Google Scholar
  21. Walker, A. R.: 1981, Monthly Notices Roy. Astron. Soc. 197, 241.ADSGoogle Scholar
  22. Wesselius, P. R., van Duinen, R. J., de Jonge, A. R. W., Aalders, J. W. G., Luinge, W., and Wildeman, K. J.: 1982, Astron. Astrophys. Suppl. 49, 427.ADSGoogle Scholar
  23. Whitelock, P. A.: 1977, unpublished data.Google Scholar

Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1984

Authors and Affiliations

  • Jon Darius
    • 1
  1. 1.Science Museum and University CollegeLondonUK

Personalised recommendations