Journal of Astrophysics and Astronomy

, Volume 26, Issue 2–3, pp 261–271

Pulsations in subdwarf B stars

  • C. Simon Jeffery
Article

Abstract

Subdwarf B stars play a significant role in close binary evolution and in the hot star content of old stellar populations, in particular in giant elliptical galaxies. While the question of their origin poses several problems for stellar evolution theory, one of their most fascinating properties is the presence of multi-periodic 2–3 minute oscillations. Interpreting these oscillations optimally requires the correct identification of the modes. Partial identifications can be obtained using high-speed observations of radial velocity and colour variations. We review some of the several attempts to make such observations, most recently with the Multi-Site Spectroscopic Telescope campaign and withULTRACAM.

Key words

Stars: oscillations stars: variables: other (EC14026/sdBV) stars: individual: KPD2109+4401, PB8783, PG1605+072, HS0039+4302, PG0014+067 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Brown, T. M., Bowers, C. W., Kimple, R. A.et al. 2000,ApJ,532, 308.CrossRefADSGoogle Scholar
  2. Brown, T. M., Sweigart A. V., Lanz, T., Landsman W. B., Hubeny, I. 2001,ApJ,562, 368.CrossRefADSGoogle Scholar
  3. Allard, F., Wesemael, E, Fontaine, G., Bergeron, P., Lamontagne, R. 1994,AJ,107, 1565.CrossRefADSGoogle Scholar
  4. Aznar Cuadrado, R., Jeffery, C. S. 2001,A&A,368, 994.CrossRefADSGoogle Scholar
  5. Billères, M., Fontaine, G., Brassard, P., Charpinet, S., Liebert, J., Saffer, R. A., Vauclair, G. 1997,ApJ,487, L81.CrossRefADSGoogle Scholar
  6. Billères, M., Fontaine, G., Brassard, P., Charpinet, S., Liebert, J., Saffer, R. A., Bergeron, P., Vauclair, G. 1998,ApJ,494, L75.CrossRefADSGoogle Scholar
  7. Brassard, P., Fontaine, G., Billèreset al. 2001,ApJ,563, 1013.CrossRefADSGoogle Scholar
  8. Charpinet, S., Fontaine, G., Brassard, P., Dorman, B. 1996,ApJ,471, L103.CrossRefADSGoogle Scholar
  9. Charpinet, S., Fontaine, G., Brassard, P., Chayer, P., Rogers, F. J., Iglesias, C. A., Dorman, B. 1997,ApJ,483, L123.CrossRefADSGoogle Scholar
  10. Charpinet, S., Fontaine, G., Brassard, P. 2001,PASP, 775.Google Scholar
  11. Charpinet, S., Fontaine, G., Brassard, P., Dorman, B. 2002,ApJS,140, 469.CrossRefADSGoogle Scholar
  12. Green, E. M., Fontaine, G., Reed M.et al. 2003,ApJ,583, 31.CrossRefADSGoogle Scholar
  13. Greenstein, J. L., Sargent, A. I. 1974,ApJS,28, 157.CrossRefADSGoogle Scholar
  14. Gautschy, A., Saio, H. 1995,Ann Rev. Astr. Astrophys.,33, 75.CrossRefADSGoogle Scholar
  15. Gautschy, A., Saio, H. 1996,Ann Rev. Astr. Astrophys.,34, 551.CrossRefADSGoogle Scholar
  16. Heber, U. 1986,AA,155, 33.ADSGoogle Scholar
  17. Heber, U., Hunger, K., Jonas, G., Kudritzki, R. P. 1984,AA,130, 119.ADSGoogle Scholar
  18. Heber, U., Kudritzki, R. P., Caloi, V., Castellani, V., Danziger, J., Gilmozzi, R. 1986,AA,162, 171.ADSGoogle Scholar
  19. Heber, U., Dreizler, S., Schuh, S. L.et al. 2003, In “White Dwarfs”, NATO Sceince Series II/105, p. 105.Google Scholar
  20. Heynderickx, D., Waelkens, C., Smeyers, P. 1994,A&AS,105, 447.ADSGoogle Scholar
  21. Iben, I. Jr., Tutukov, A.V. 1985,ApJS,58, 661.CrossRefADSGoogle Scholar
  22. Iben, I. Jr., Tutukov, A.V. 1986,ApJ,311, 753.CrossRefADSGoogle Scholar
  23. Iben, I. Jr. 1990,ApJ,353, 215.CrossRefADSGoogle Scholar
  24. Jeffery, C. S., Pollacco, D. 2000,MNRAS,318, 974.CrossRefADSGoogle Scholar
  25. Jeffery, C. S., Dhillon, V. S., Marsh, T. R., Ramachandran, B. 2004,MNRAS,352, 699.CrossRefADSGoogle Scholar
  26. Jeffery, C. S., Aerts, C., Dhillon, V. S., Marsh, T. R., GÄnsicke, B. 2005,MNRAS, in press.Google Scholar
  27. Kilkenny, D. 2002,ASP Conf. Series,259, 356.ADSGoogle Scholar
  28. Kilkenny, D., Koen, C., O’Donoghue, D., Stobie, R. S. 1997,MNRAS,285, 640.ADSGoogle Scholar
  29. Kilkenny, D., Koen, C., O’Donoghue, D., van Wyk, F, Larson, K.A., Shobbrook, R., Sullivan, D. J., Burleigh, M. R., Dobbie, P. D., Kawaler, S. D. 1999,MNRAS,303, 525.CrossRefADSGoogle Scholar
  30. Koen, C. 1998,MNRAS,300, 567.CrossRefADSGoogle Scholar
  31. Koen, C., Kilkenny, D., O’Donoghue, D., van Wyk, F, Stobie, R. S. 1997,MNRAS,285, 645.ADSGoogle Scholar
  32. Koen, C., O’Donoghue, D., Kilkenny, D., Lynas-Gray, A. E., Marang, F, van Wyk, F. 1998,MNRAS,296, 317.CrossRefADSGoogle Scholar
  33. Maxted, P. F. L., Marsh, T. R., North, R. C. 2000,MNRAS,317, L41.CrossRefADSGoogle Scholar
  34. Michaud, G., Bergeron, P., Wesemael, F., Heber, U. 1989,ApJ,338, 417.CrossRefADSGoogle Scholar
  35. O’Donoghue, D. 1999,ASP Conf. Series 169, 149.ADSGoogle Scholar
  36. O’Donoghue, D., Koen, C., Solheim, J.-E., Barstow, M. A., Dobbie, P. D., O’Brien, M. S., Clemens, J. C., Sullivan, D. J., Kawaler, S. D. 1998,MNRAS,296, 296.CrossRefADSGoogle Scholar
  37. O’Toole, S. J. 2004,A&A,423, 250.CrossRefGoogle Scholar
  38. O’Toole, S. J., Teixeira, T. C., Bedding, T. R., Kjeldsen, H. 2000,ApJL,537, L53.CrossRefADSGoogle Scholar
  39. O’Toole, S. J., Falter, S., Heber, U.et al. 2004,Ap&SS,291, 457.CrossRefADSGoogle Scholar
  40. Ramachandran, B., Jeffery, C. S., Townsend, R. H. D. 2004,A&A,428, 209.CrossRefADSGoogle Scholar
  41. Reid, A., Bolton, C. T., Crowe, R. A., Fieldus, M. S., Fullerton, A. W., Gies, D. R., Howarth, I. D., McDavid, D., Prinja, R. K., Smith, K. C. 1993,ApJ,417, 320.CrossRefADSGoogle Scholar
  42. Rutten, R., Gribbin, F, Ives, D., Bennett, T., Dhillon, V. 1997, “Drift-Mode CCD readout — User’s Manual”, Isaac Newton Group, La Palma.Google Scholar
  43. Saio, H. 1996,ASP Conf. Series,96, 361.ADSGoogle Scholar
  44. Saio, H., Jeffery, C. S. 2000,MNRAS,313, 671.CrossRefADSGoogle Scholar
  45. Stathakis, R. A., Johnston, H. M. 1997, AAO UM-2.3: The RGO Spectrograph Manual Version 3.1. Anglo-Australian Observatory, Epping.Google Scholar
  46. Telting, J. H., Aerts, C., Mathias, P. 1997,A&A,322, 493.ADSGoogle Scholar
  47. Vauclair, G. 1996,ASP Conf. Series,96, 397.ADSGoogle Scholar
  48. Woolf, V. M., Jeffery, C. S., Pollacco, D. 2002,MNRAS,329, 497CrossRefADSGoogle Scholar

Copyright information

© Indian Academy of Sciences 2005

Authors and Affiliations

  • C. Simon Jeffery
    • 1
  1. 1.Armagh ObservatoryArmaghNorthern Ireland

Personalised recommendations