Abstract
The low-mass X-ray binary Cyg X-3 is unusual for its high radio, infrared, and X-ray luminosities. This paper reviews the observational situation at all wavelengths, and reports the first results of a series of coordinated observations at all wavelengths.
Our observations of low-level radio emission from Cyg X-3 show that this emission is characterized by successive flares whose spectral evolution is similar to the giant radio flares observed in Cyg X-3. As with the giant flares, we interpret these flares to be expanding sources of electron synchrotron radiation. We present VLBI data at 1.3 cm wavelength that confirm this interpretation. We find that the timing of the flare onsets is periodic with a period several percent longer than the binary orbital period. We suggest the radio period is the result of periodic modulation of the binary separation. We present two models for this period that are consistent with the existing data, while making differing predictions about what more extensive data should show. Modulation at the radio period may be caused by precession of the line of apsides in an eccentric orbit. Alternatively, three-body simulations show that the modulation of the binary separation in a triple system may mimic the radio period much of the time, but would also show well-defined phase jumps twice per orbit of the third star.
We find that the effect of X-ray scattering by the interstellar medium on the observed X-ray light curve is to decrease the depth of modulation from its intrinsic value for photon energies less than 6 keV. These data are not consistent with either cocoon or stellar wind models for the light curve. They are consistent with the accretion disk corona model of White and Holt, which we have elaborated to take into account the density stratification of the disk.
Our results show that Cyg X-3 is an important source for the study of binary evolution, accretion disk structure, and the formation and evolution of radio jets.
Preview
Unable to display preview. Download preview PDF.
References
Battistoni, G. et al. 1985, Phys. Lett., 155B, 465.
Becker, R. H., Robinson-Saba, J. L., Boldt, E. A., Holt, S. S., Pravdo, S. H., Serlemitsos, P. J., and Swank, J. H. 1978, Ap. J. (Lett.), 224, L113.
Becklin, E. E., Kristian, J., Neugebauer, G., Wynn-Williams, C. G. 1972, Nature Phys. Sci., 239, 130.
Becklin, E. E., Neugebauer, G., Hawkins, F. J., Mason, K. O., Sanford, P. W., Matthews, K., and Wynn-Williams, C. G. 1973, Nature, 245, 302.
Berezinsky, V. S., Ellis, J., and Ioffe, B. L. 1986, Phys. Lett., 172B, 423.
Berger, Ch. et al. 1986, submitted to Phys. Lett. B.
Blissett, R. J., Mason, K. O., and Culhane, J. L. 1981, M. N. R. A. S., 194, 77.
Bonnet-Bidaud, J. M., and van der Klis, M. 1981, A. A., 101, 299.
Braes, L. L. E., and Miley, G. K. 1972, Nature, 237, 506.
Brinkman, A., Parsignault, D., Giacconi, R., Gursky, H., Kellogg, E., Schreier, E., and Tananbaum, H. 1972, IAU Circ., No. 2446.
Cruddace, R., Paresce, F., Bowyer, S., and Lampton, M. 1974, Ap. J., 187, 497.
Davidsen, A., and Ostriker, J. P. 1974, Ap. J., 189, 331.
Dickey, J. M. 1983, Ap. J. (Lett.), 273, L71.
Elsner, R. F., Ghosh, P., Darbro, W., Weisskopf, M. C., Sutherland, P. G., and Grindlay, J. E. 1980, Ap. J., 239, 335.
Faulkner, J., Flannery, B.P., and Warner, B. 1972, Ap. J. (Lett.), 175, L79.
Geldzahler, B. J., Johnston, K. J., Spencer, J. H., Klepczynski, W. J., Josties, F. J., Angerhofer, P. E., Florkowski, D. R., McCarthy, D. D., Matsakis, D. N., and Hjellming, R. M. 1983, Ap. J. (Lett.), 273, L65.
Ghosh, P., Elsner, R. F., Weisskopf, M. C., and Sutherland, P. G. 1981, Ap. J., 251, 230.
Giacconi, R., Gorenstein, P., Gursky, H., and Waters, J. R. 1967, Ap. J. (Lett.), 148, L119.
Gregory, P. C. 1972, Nature, 239, 439.
Hertz, P., Joss, P. C., and Rappaport, S. 1978, Ap. J., 224, 614.
Hinteregger, H. F. et al. 1972, Nature Phys. Sci., 240, 159.
Johnston, K. J., et al. 1986, Ap. J., in press.
Kitamoto, S. 1985, in Japan-U.S. Seminar on Galactic and Extragalactic Compact X-ray Sources, ed. Y. Tanaka and W. H. G. Lewin (Tokyo: Institute of Space and Astronautical Science), p. 201.
Marshak, M. L. et al. 1985a, Phys. Rev. Lett., 54, 2079.
Marshak, M. L. et al. 1985b, Phys. Rev. Lett., 55, 1965.
Mason, K. O., et al. 1976, Ap. J., 207, 78.
Mason, K. O., Cordova, F. A., and White, N. E. 1986, Ap. J., in press.
Mauche, C. W., and Gorenstein, P. 1986, Ap. J., 302, 371.
Meegan, C. A., Fishman, G. J., and Haymes, R. C. 1979, Ap. J. (Lett.), 234, L123.
Milgrom, M. 1976, A. A., 51, 215.
Milgrom, M., and Pines, D. 1978, Ap. J., 220, 272.
Molnar, L. A. 1985, Ph.D. thesis, Harvard University.
Molnar, L. A. 1986, submitted to Physical Review Letters.
Molnar, L. A., and Mauche, C. W. 1986, Ap. J., in press.
Molnar, L. A., Reid, M. J., and Grindlay, J. E. 1983, IAU Circ., No. 3885.
Molnar, L. A., Reid, M. J., and Grindlay, J. E. 1984, Nature, 310, 662.
Molnar, L. A., Reid, M. J., and Grindlay, J. E. 1985, Radio Stars, (R. M. Hjellming and D. M. Gibson, eds.), Astrophysics and Space Science Series, Reidel, Dordrecht, p. 329.
Molteni, D., Rapisarda, M., Robba, N. R., and Scarsi, L. 1980, A. A., 87, 88.
Nicolson, G. D., Feast, M. W., and Glass, I. S. 1980, M. N. R. A. S., 191, 293.
Oyama, Y. et al. 1986, Phys. Rev. Lett., 56, 991.
Papaloizou, J., and Pringle, J. E. 1979 M. N. R. A. S., 189, 293.
Priedhorsky, W., and Terrell, J. 1986, Ap. J., 301, 886.
Reppin, C., Pietsch, W., Trümper, J., Voges, W., Kendziorra, E., and Staubert, R. 1979, Ap. J., 234, 329.
Serlemitsos, P. J., Boldt, E. A., Holt, S. S., Rothschild, R. E., and Saba, J. L. R. 1975, Ap. J. (Lett.), 201, L9.
Spencer, R. E., Swinney, R. W., Johnston, K. J., and Hjellming, R. M. 1986, Ap. J., in press.
Taylor, A. R., and Gregory, P. C. 1982, Ap. J., 255, 210.
van den Heuvel, E. P. J., and De Loore, C. 1973, A. A., 25, 387.
van der Klis, M. 1985, in Japan-U.S. Seminar on Galactic and Extragalactic Compact X-ray Sources, ed. Y. Tanaka and W. H. G. Lewin (Tokyo: Institute of Space and Astronautical Science), p. 195.
van der Klis, M., and Bonnet-Bidaud, J. M. 1981, A. A., 95, L5.
van der Klis, M., and Bonnet-Bidaud, J. M. 1982, A. A. (Suppl.), 50, 129.
van der Laan, H. 1966, Nature, 211, 1131.
Weekes, T. C. 1986, The Proceedings of the VIth Astrophysics Meeting (on Accretion Processes in Astrophysics) of the XXIth Rencontre de Moriond, held at Les Arcs, Savoie, France.
Westphal, J. A., Kristian, J., Huchra, J. P., Schectman, S. A., Brucato, R. J. 1972, Nature Phys. Sci., 239, 134.
White, N. E., and Holt, S. S. 1982, Ap. J., 257, 318.
Willingale, R., King, A. R., and Pounds, K. A. 1985, M. N. R. A. S., 215, 295.
Willner S. P. 1984, Galactic and Extragalactic Infrared Spectroscopy, M. F. Kessler and J. P. Phillips (eds.), D. Reidel, p. 37.
Worstell, W. A. 1986, Ph.D. thesis, Harvard University.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1986 Springer-Verlag
About this paper
Cite this paper
Molnar, L.A. (1986). Cygnus X-3. In: Mason, K.O., Watson, M.G., White, N.E. (eds) The Physics of Accretion onto Compact Objects. Lecture Notes in Physics, vol 266. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-17195-9_18
Download citation
DOI: https://doi.org/10.1007/3-540-17195-9_18
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-17195-9
Online ISBN: 978-3-540-47358-9
eBook Packages: Springer Book Archive