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Quasi-Periodicity in global solar radio flux at metric wavelengths during Noise Storms

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Abstract

We present observational results from studying the quasi-periodicities in global solar radio flux during periods of enhanced noise storm activity, over durations of ∼ 4 hr a day (`intra-day' variations), observed at 77.5 MHz with the newly commissioned log-periodic array tracking system at the Gauribidanur Radio Observatory. Positional information on the storm centers was obtained with the radio imaging data from the Nan\c cay Radio Heliograph (NRH), while their active region counterparts on the photosphere (and the overlying chromosphere ) were located from the Hα images of the Big Bear Solar Observatory. The quasi-periodicity in flux was found to be 110 min, with the fluctuation in flux being 3(±1.5) solar flux units (s.f.u.). The results of such pulsations are interpreted qualitatively as evidence for coronal seismology.

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References

  • Aschwanden, M. J.: 1987, Solar Phys. 111, 113.

    Google Scholar 

  • Aschwanden, M. J. and Bastian, T. S., 1994, Astrophys. J. 426, 434.

    Article  Google Scholar 

  • Baars, J. W. M.et al.: 1977, Astron. Astrophys. 61, 99.

    Google Scholar 

  • Benz, A. O. and Wentzel, D. G.: 1981, Astron. Astrophys. 84, 100.

    Google Scholar 

  • Brueckner, G. E.: 1983, Solar Phys. 85, 243.

    Google Scholar 

  • Dodson, H. W. and Hedeman, E. R.: 1957, Astrophys. J. 125, 827.

    Article  Google Scholar 

  • Dulk, G. A. and Nelson, G. J.: 1973, Proc. Astr. Soc. Aust. 2(4), 211.

    Google Scholar 

  • Elgarøy, Ø.: 1977, Solar Noise Storms, Pergamon, Oxford.

    Google Scholar 

  • Grigoreva, V. P., Pugacheva, G. I., and Shestopalov, I. P.: 1977, Geomagnetism and Aeronomy (Trans.) 17, 221.

    Google Scholar 

  • Hey, R.: 1946, Nature 157, 47.

    Google Scholar 

  • McCready, L. L., Pawsey, J. L., and Payne-Scott, R.: 1947, Proc. Roy. Soc. (A) 190, 357.

    Google Scholar 

  • Ramesh, R. et al.: 1998, Solar Phys. 181, 439.

    Article  Google Scholar 

  • Solar-Geophysical Data prompt reports, July 2002, 695-PartI.

  • Solar-Geophysical Data prompt reports, August 2002, 696-PartI.

  • Solar-Geophysical Data prompt reports, September 2002, 697-PartI.

  • Spicer, D. S., Benz, A. O., and Huba, J. D.: 1981, Astron. Astrophys. 105, 221.

    Google Scholar 

  • Wentzel, D. G.: 1981, Astron. Astrophys. 100, 20.

    Google Scholar 

  • Wild, J. P.: 1950, Aust.J.Sci.Res. A4, 36.

    Google Scholar 

Download references

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Authors and Affiliations

  1. Joint Astronomy Programme, Department of Physics, Indian Institute of Science, Bangalore -, 560012, Karnataka, India

    G.A. Shanmugha Sundaram

  2. Indian Institute of Astrophysics, Bangalore -, 560034, Karnataka, India

    K.R. Subramanian

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  1. G.A. Shanmugha Sundaram
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  2. K.R. Subramanian
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Sundaram, G.S., Subramanian, K. Quasi-Periodicity in global solar radio flux at metric wavelengths during Noise Storms. Solar Physics 222, 311–322 (2004). https://doi.org/10.1023/B:SOLA.0000043555.04556.9f

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