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A statistical investigation of microwave burst spectra for the determination of source inhomogeneities

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Abstract

A statistical analysis of 106 microwave burst spectra shows, that the most frequent value of the spectral index below the peak frequency is 1.4. It is considerably smaller than values found so far and is explained in terms of a thermal and optically thick source whose area increases with decreasing frequency due to temperature and magnetic field inhomogeneities in the source boundary. The interpretation is supported by the absence of correlation between the spectral index and the maximum flux. An estimate of the inhomogeneities is made.

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References

  • Böhme, A., Fürstenberg, F., Hildebrandt, J., Saal, O., Krüger, A., Hoyng, P., and Stevens, G. A.: 1977, Solar Phys. 53, 139.

    Google Scholar 

  • Crannell, C. J., Frost, K. J., Mätzler, C., Ohku, K., and Saba, J. L.: 1978, Astrophys. J. 223, 620.

    Google Scholar 

  • Croom, D. L. and Powell, R. J.: 1971, Solar Phys. 20, 136.

    Google Scholar 

  • Das Gupta, M. K. and Sarkar, S. K.: 1971, Indian J. Pure Appl. Phys. 9, 187.

    Google Scholar 

  • Davies, R. D.: 1954, Monthly Notices Roy. Astron. Soc. 114, 74.

    Google Scholar 

  • Dulk, G. A., Melrose, D. B., and White, S. M.: 1979, to be submitted to Astrophys. J.

  • Flückiger, K., Magun, and Mätzler, C.: 1971 to 1974, Solar Observations, Institute of Applied Physics, University of Berne, unpublished data.

  • Giesecke, A. A., Casaverde, M., and Ishitsuka, M.: 1971 to 1974, Monthly Report of Solar Radio Noise Observations, Departamento de Actividad Solar, Instituto Geofísico del Perú, Huancayo, Perú.

    Google Scholar 

  • Guidice, D. A. and Castelli, J. P.: 1975, Solar Phys. 44, 155.

    Google Scholar 

  • Harvey, G. A.: 1964, Astrophys. J. 139, 16.

    Google Scholar 

  • Mätzler, C.: 1978, Astron. Astrophys. 70, 181.

    Google Scholar 

  • Mätzler, C., Bai, T., Crannell, C. J., and Frost, K. J., 1979, submitted to Astrophys. J.

  • Ramaty, J. P.: 1969, Astrophys. J. 158, 753.

    Google Scholar 

  • Ramaty, R. and Petrosian, V.: 1972, Astrophys. J. 178, 241.

    Google Scholar 

  • Schöchlin, W., Stocker, F., and Schanda, E.: 1974, in E. Schanda (ed.), Proceedings of the Fourth Meeting of the CESRA, Berne, p. 95.

  • Solar Geophysical Data: 1971 to 1974, No. 329 to 365, Part II, U.S. Department of Commerce, Boulder, Colo., U.S.A.

  • Späth, H.: 1975, Cluster-Analyse-Algorithmen, R. Oldenburg, Munchen.

    Google Scholar 

  • Takakura, T.: 1972, Solar Phys. 26, 151.

    Google Scholar 

  • Vorpahl, J.: 1972, Solar Phys. 27, 397.

    Google Scholar 

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Authors and Affiliations

  1. Institute of Applied Physics, University of Berne, 3012, Berne, Switzerland

    W. Schoechlin & A. Magun

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  1. W. Schoechlin
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  2. A. Magun
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Schoechlin, W., Magun, A. A statistical investigation of microwave burst spectra for the determination of source inhomogeneities. Sol Phys 64, 349–357 (1979). https://doi.org/10.1007/BF00151445

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  • DOI: https://doi.org/10.1007/BF00151445

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