Solar Physics

, Volume 166, Issue 2, pp 379–401 | Cite as

Travelling interplanetary disturbances detected using interplanetary scintillation at 327 MHz

  • P. Janardhan
  • V. Balasubramanian
  • S. Ananthakrishnan
  • M. Dryer
  • A. Bhatnagar
  • P. S. McIntosh
Article

Abstract

Based on the advance predictions of two flare-generated shock fronts, obtained from the Space Environment Centre (SEC, NOAA, Boulder), observations of interplanetary scintillation (IPS) were carried out with the Ooty Radio Telescope (ORT) on a grid of appropriately located sources during the period 31 October to 5 November, 1992. Solar wind velocities were derived by fitting model spectra to the observed spectra and two travelling interplanetary disturbances were detected. Both disturbances were traced back to an active region on the Sun which was located close to a large coronal hole. The roles of flares and coronal holes in producing such disturbances are examined and it is shown that in the present case both the coronal hole and the active region probably played key roles in generating the two IPS disturbances.

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References

  1. Alurkar, S. K., Bobra, A. D., Nirman, N. S., Venat, P., and Janardhan, P.: 1989, Ind. J. Pure Appl. Phys. 27, 32.Google Scholar
  2. Ananthakrishnan, S., Kulkarni, V. K., Ponsonby, J. E. B., Spencer, R. E., Graham, D. A., Porcas, R. W., Van Ardenne, A., Schilizzi, R. T., Gorgolewski, S., Kus, A., Matvyenko, L. I., and Papucenko, A. H.: 1989, Monthly Notices Roy. Astron. Soc. 237, 341.Google Scholar
  3. Balasubramanian, V., Janardhan, P., Ananthakrishnan, S., and Manoharan, P. K.: 1993, Bul. Astr. Soc. India 21, 469.Google Scholar
  4. Bird, M. K. and Edenhofer, P.: 1990, in R. Schwenn and E. Marsch (eds.), Physics of the Inner Heliosphere I, Springer-Verlag, Berlin, p. 13.Google Scholar
  5. Bravo, S. and Pérez-Enríquez, R.: 1994, Rev. Mexicana Astron. Astrofisica 28, 17.Google Scholar
  6. Coles, W. A.: 1978, Space Sci. Rev. 21, 411.Google Scholar
  7. Dryer, M.: 1994, Space Sci. Rev. 67, 363.Google Scholar
  8. Gapper, G. R., Hewish, A., Purvis, A., and Duffett-Smith, P. J.: 1982, Nature 296, 633.Google Scholar
  9. Ghigo, F. D. and Owen, F. N.: 1978, Preprint No. 6, University of Texas Radio Astronomy Observatory.Google Scholar
  10. Gosling, J. T.: 1993, J. Geophys. Res. 98, No. A11, 18937.Google Scholar
  11. Hewish, A. and Bravo, S.: 1986, Solar Phys. 106, 185.Google Scholar
  12. Hewish, A. and Duffett-Smith, P. J.: 1987, Planetary Space Sci. 35, 487.Google Scholar
  13. Hewish, A., Tappin, S. J., and Gapper, G. R.: 1985, Nature 314, 137.Google Scholar
  14. Jackson, B. V: 1991, Solar Wind Seven, Proc. 3rd COSPER Colloquium, p. 243.Google Scholar
  15. Jackson, B. V., Rompolt, B., and Švestka, Z.: 1988, Solar Phys. 115, 327.Google Scholar
  16. Kakinuma, T., Washimi, H., and Kojima, M.: 1973, Publ. Astron. Soc. Japan 25, 271.Google Scholar
  17. Kakinuma, T. and Kojima, M.: 1984, Proc. Res. Inst. Atmos. 31, 1.Google Scholar
  18. Large, M. I., Mills, B. Y., Little, A. G., Crawford, D.F., and Sutton, J. M.: 1981, Monthly Notices Roy. Astron. Soc. 194, 693; and Microfiches MN 194/1.Google Scholar
  19. Leinbach, H., Ananthakrishnan, S., and Detman, T. R.: 1994, NOAA Tech. Memo. ERL SEL-83.Google Scholar
  20. Manoharan, P. K.: 1991, PhD Thesis, Bombay University, India.Google Scholar
  21. Manoharan, P. K. and Ananthakrishnan, S.: 1990, Monthly Notices Roy. Astron. Soc. 244, 691.Google Scholar
  22. Manoharan, P. K., Ananthakrishnan, S., and Pramesh Rao: 1987, Proc. of the Sixth Solar Wind Conf. Vol. I, p. 55.Google Scholar
  23. Manoharan, P. K., Ananthakrishnan, S., Dryer, M., Detman, T. R., Leinbach, H., Kojima, M., Watanabe, T., and Kahn, J.: 1995, Solar Phys. 156, 377.Google Scholar
  24. Marians, M.: 1975, Radio Sci. 10, 115.Google Scholar
  25. Rickett, B. J.: 1975, Solar Phys. 43, 237.Google Scholar
  26. Salpeter, E. E.: 1967, Astrophys. J. 147, 433.Google Scholar
  27. Schwenn, R.: 1986, Space Sci. Rev. 44, 139.Google Scholar
  28. Scott, S. L., Coles, W. A., and Bourgeois, H.: 1983, Astron. Astrophys. 123, 207.Google Scholar
  29. Selvanayagam, A. J., Praveenkumar, A., Nandagopal, D., and Velusamy, T.: 1993, IETE Technical Rev. 10, No. 4. 333.Google Scholar
  30. Smart, D. F. and Shea, M. A.: 1985, J. Geophys. Res. 90, 183.Google Scholar
  31. Smart, D.F., Shea, M. A., Dryer, M., Quintana, L., C., Gentile and Bathurst, A. A.: 1986, in P. A. Simon, G. R. Heckman, and M. A. Shea (eds.), Solar-Terrestrial Predictions, U.S. Govt. Printing Office, Washington, p. 471.Google Scholar
  32. Smith, Z. and Dryer, M.: 1990, Solar Phys. 129, 387.Google Scholar
  33. Smith, Z. and Dryer, M.: 1991, Solar Phys. 131, 363.Google Scholar
  34. Watanabe, K. and Marubashi, K.: 1985, J. Geomag. Geoelectr. 37, 869.Google Scholar
  35. Woo, R. and Armstrong, J. W.: 1981, Nature 292, 608.Google Scholar
  36. Yakovlev, O. I., Efimov, A. I., Razmanov, V. M., and Shtrykov, V. K.: 1980, Soviet Astron. 24, 454.Google Scholar

Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • P. Janardhan
    • 1
  • V. Balasubramanian
    • 2
  • S. Ananthakrishnan
    • 3
  • M. Dryer
    • 4
  • A. Bhatnagar
    • 5
  • P. S. McIntosh
    • 6
  1. 1.Physical Research LaboratoryAhmedabadIndia
  2. 2.Radio Astronomy Centre, TIERUdhagamandalam OotyIndia
  3. 3.National Centre for Radio Astrophysics, TIFRGaneshkhind, PuneIndia
  4. 4.Cooperative Institute for Research in Environmental Sciences, University of Colorado, Space Environment Centre, NOAABoulderUSA
  5. 5.Udaipur Solar ObservatoryUdaipurIndia
  6. 6.National Oceanic and Atmospheric AdministrationBoulderUSA

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