White Dwarfs in Ultrashort Binary Systems

  • Gian Luca Israel
  • Simone Dall'Osso
Part of the Astrophysics and Space Science Library book series (ASSL, volume 359)

White dwarf binaries are thought to be the most common binaries in the Universe: in our Galaxy their number is estimated to be as high as 108. In addition, most stars are known to be part of binary systems, roughly half of which have orbital periods short enough that the evolution of the two stars is strongly influenced by the presence of a companion. Furthermore, it has become clear from observed close binaries, that a large fraction of binaries that interacted in the past must have lost considerable amounts of angular momentum, thus forming compact binaries, with compact stellar components. The details of the evolution leading to the loss of angular momentum are uncertain, but generally this is interpreted in the framework of the so-called “common-envelope evolution”: the picture that in a mass-transfer phase between a giant and a more compact companion, the companion quickly ends up inside the giant's envelope, after which frictional processes slow down the companion and the core of the giant, causing the “common envelope” to be expelled, as well as the orbital separation to shrink dramatically [55].

Among the most compact binaries known, often called ultra-compact or ultra-short binaries, are those hosting two white dwarfs and classified into two types: detached binaries, in which the two components are relatively widely separated and interacting binaries, in which mass is transferred from one component to the other. In the latter class a white dwarf is accreting from a white dwarf like object (we often refer to them as AM CVn systems, after the prototype of the class, the variable star AM CVn; [56, 28]).


Orbital Period White Dwarf Orbit Coupling Orbital Evolution Common Envelope 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    S. C. C. Barros, T. R. Marsh, P. Groot, et al.: MNRAS 357, 1306 (2005)CrossRefADSGoogle Scholar
  2. 2.
    S. C. C. Barros, et al.: MNRAS, 374, 1334 (2007)CrossRefADSGoogle Scholar
  3. 3.
    K. Beuermann, H.-C. Thomas, K. Reinsch, et al., Astr. & Astroph. 347, 47 (1999)ADSGoogle Scholar
  4. 4.
    V. Burwitz, and K. Reinsch: 2001, X-ray astronomy: stellar endpoints, AGN, and the diffuse X-ray background, Bologna, Italy, eds White, N. E., Malaguti, G., Palumbo, G., AIP conference proceedings, 599, 522 (2001)Google Scholar
  5. 5.
    J. T. Clarke, et al.: Science, 274, 404 (1996)CrossRefADSGoogle Scholar
  6. 6.
    M. Cropper, M.K. Harrop-Allin, K.O. Mason, et al.: MNRAS, 293, L57 (1998)CrossRefADSGoogle Scholar
  7. 7.
    S. Dall'Osso, G. L. Israel & L. Stella: Astr. & Astroph. 447, 785 (2006a)CrossRefADSGoogle Scholar
  8. 8.
    S. Dall'Osso, G. L. Israel & L. Stella: astro-ph/0603795 (2006b)Google Scholar
  9. 9.
    F. D'Antona, P. Ventura, L. Burderi, & A. Teodorescu: Ap. J. 653, 1429 (2006)CrossRefADSGoogle Scholar
  10. 10.
    C. J. Deloye & R. E. Taam: Ap. J. Lett. 649, L99 (2006)CrossRefADSGoogle Scholar
  11. 11.
    C. R. Evans, I. Iben, and L. Smarr: Ap.J. 323, 129 (1987)CrossRefADSGoogle Scholar
  12. 12.
    P. Goldreich & D. Lynden-Bell: Ap. J. 156, 59 (1969)1CrossRefGoogle Scholar
  13. 13.
    P. J. Groot, G. Nelemans, D. Steeghs, and T. R. Marsh, Ap.J. Letters 558, L123 (2001)CrossRefADSGoogle Scholar
  14. 14.
    P. Hakala, G. Ramsay, K. Wu, L. Hjalmarsdotter, et al.: MNRAS, 343, L10 (2003)CrossRefADSGoogle Scholar
  15. 15.
    P. Hakala, G. Ramsay, and K. Byckling: MNRAS 353, 453 (2004)CrossRefADSGoogle Scholar
  16. 16.
    I. Iben, and A. V. Tutukov: Ap.J. Supplement, 54, 355 (1984).ADSGoogle Scholar
  17. 17.
    G.L. Israel, M.R. Panzera, S. Campana, et al.: Astr. & Astroph. 349, L1 (1999)Google Scholar
  18. 18.
    G.L. Israel, L. Stella, W. Hummel, S. Covino and S. Campana, IAU Circ., 7835, (2002a)Google Scholar
  19. 19.
    G.L. Israel et al.: A&A, 386, L13 (I02) (2002b)CrossRefADSGoogle Scholar
  20. 20.
    G. L. Israel et al.: Ap. J. 598, 492 (2003)CrossRefADSGoogle Scholar
  21. 21.
    G. L. Israel, et al.: Memorie della Societa Astronomica Italiana Supplement 5, 148 (2004)ADSGoogle Scholar
  22. 22.
    T. R. Marsh, K. Horne, and S. Rosen: Ap.J. 366, 535 (1991)CrossRefADSGoogle Scholar
  23. 23.
    T.R. Marsh, and G. Nelemans: MNRAS 363, 581 (2005)ADSGoogle Scholar
  24. 24.
    T. R. Marsh, & D. Steeghs: MNRAS 331, L7 (2002)CrossRefADSGoogle Scholar
  25. 25.
    C. Motch, F. Haberl, P. Guillout, M. Pakull, et al.: A&A 307, 459 (2006)ADSGoogle Scholar
  26. 26.
    G. Nelemans, F. Verbunt, L. R. Yungelson, and S. F. Portegies Zwart: A&A 360, 1011 (2000)ADSGoogle Scholar
  27. 27.
    G. Nelemans, L. R. Yungelson, S. F. Portegies Zwart, and F. Verbunt: A&A 365, 491 (2001)CrossRefADSGoogle Scholar
  28. 28.
    G. Nelemans: ASP Conf. Ser. 330 – The Astrophysics of Cataclysmic Variables and Related Objects, 330, p. 27, (2005), astro-ph/0409676.Google Scholar
  29. 29.
    G. Nelemans , R. Napiwotzki , C. Karl , T. R. Marsh , et al. A&A 440, 1087 (2005)CrossRefADSGoogle Scholar
  30. 30.
    G. Nelemans, and C. A. Tout, MNRAS 356, 753 (2005)CrossRefADSGoogle Scholar
  31. 31.
    G. Nelemans, & P. G. Jonker: astro-ph/0605722 (2006); to appear in proceedings of “A life with stars” a conference in honour of Ed van den Heuvel's 60th birthday, New Ast. RevGoogle Scholar
  32. 32.
    G. Nelemans: AIP Conf. ser. 873 (Ed. S.M. Merkowitz, J.C. LIvas), 873, p. 397 (2007), astro-ph/0703292Google Scholar
  33. 33.
    A.J. Norton, C.A., Haswell, G.A. Wynn: A&A 419, 1025 (2004)CrossRefADSGoogle Scholar
  34. 34.
    S. Perlmutter, G. Aldering, M. della Valle, S. Deustua, et al.: Nature 391, 51 (1998)CrossRefADSGoogle Scholar
  35. 35.
    M. M. Phillips: Ap.J. 413, L105 (1993)CrossRefADSGoogle Scholar
  36. 36.
    J. H. Piddington: Moon 17, 373 (1977)CrossRefADSGoogle Scholar
  37. 37.
    P. Podsiadlowski , P. A. Mazzali , P. Lesaffre , C. Wolf , and F. Forster: astro-ph/0608324Google Scholar
  38. 38.
    G. Ramsay, M. Cropper, K. Wu, K.O. Mason, P. Hakala: MNRAS, 311, 75 (2000)CrossRefADSGoogle Scholar
  39. 39.
    G. Ramsay, P. Hakala, M. Cropper, et al.: MNRAS, 332, L7 (2002a)CrossRefADSGoogle Scholar
  40. 40.
    G. Ramsay, K. Wu, M. Cropper, et al.: MNRAS, 333, 575 (2002b)CrossRefADSGoogle Scholar
  41. 41.
    G. Ramsay, P. Hakala,K. Wu, et al.: MNRAS 357, 49 (2005)ADSCrossRefGoogle Scholar
  42. 42.
    G. Ramsay, M. Cropper & P. Hakala: MNRAS 367, L62 (2006a)ADSGoogle Scholar
  43. 43.
    G. Ramsay et al.: astro-ph/0610357 (2006b), to appear in Proc 15th European White Dwarf Workshop, held in Leicester Aug 7-11th 2006, and to be published by ASPGoogle Scholar
  44. 44.
    K. Reinsch, V. Burwitz and R. Schwarz, Revista Mexicana de Astronomia y Astrofisica Conference Series, 2004, 20, pp. 122, see astro-ph/0402458Google Scholar
  45. 45.
    A. G. Riess, L.-G. Strolger, J. Tonry, S. Casertano, et al.: Ap.J. 607, 665 (2004)CrossRefADSGoogle Scholar
  46. 46.
    G. H. A. Roelofs , P. J. Groot , T. R. Marsh , et al.: MNRAS 365, 1109 (2006).ADSCrossRefGoogle Scholar
  47. 47.
    C. T. Russell et al: Planetary and Space Science 47, 133 (1998)CrossRefADSGoogle Scholar
  48. 48.
    C. T. Russell et al.: Advances in Space Research 34, 2242 (2004)CrossRefADSGoogle Scholar
  49. 49.
    N. S. Schulz, D. Chakrabarty, H. L. Marshall, et al.: Ap.J. 563, 941 (2001)CrossRefADSGoogle Scholar
  50. 50.
    D. Steeghs, T. R. Marsh, S. C. C. Barros et al.: Ap. J. 649, 382 (2006)CrossRefADSGoogle Scholar
  51. 51.
    A. Stroeer, A. Vecchio & G. Nelemans: Ap. J. Lett. 633, L33 (2005)CrossRefADSGoogle Scholar
  52. 52.
    T. E. Strohmayer: Ap. J. 581, 577 (2002)CrossRefADSGoogle Scholar
  53. 53.
    T. Strohmayer: Ap. J., 593, L39 (2003)CrossRefADSGoogle Scholar
  54. 54.
    T. E: Strohmayer: Ap. J. 627, 920 (2005)CrossRefADSGoogle Scholar
  55. 55.
    R. E. Taam, and E. L. Sandquist: ARAA 38, 113 (2000)CrossRefADSGoogle Scholar
  56. 56.
    B. Warner: Ap&SS, 225, 249 (1995)CrossRefADSGoogle Scholar
  57. 57.
    K. Werner, T. Nagel, T. Rauch, N. Hammer, and S. Dreizler: A&A 450, 725 (2006)CrossRefADSGoogle Scholar
  58. 58.
    A. J. Willes, and K. Wu: MNRAS, 348, 285 (2004)CrossRefADSGoogle Scholar
  59. 59.
    K. Wu, M. Cropper, G. Ramsay & K. Sekiguchi: MNRAS 331, 221 (2002)CrossRefADSGoogle Scholar

Copyright information

© Canopus Publishing Limited 2009

Authors and Affiliations

  • Gian Luca Israel
    • 1
  • Simone Dall'Osso
    • 1
  1. 1.INAF – Osservatorio Astronomico di RomaMonteporzio CatoneItaly

Personalised recommendations