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The Study of Solar Activity in Relation with High Frequency Variations of Solar Radio Flux

Received: 9 October 2015     Accepted: 21 October 2015     Published: 31 October 2015
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Abstract

In recent years, radio observations of solar emission at 10.7cm wavelengths show a systematic increase compared to the sunspot number (SSN). The 10.7cm solar radio flux (F10.7) is one of the most widely used indices of solar activity. The solar magnetic field flux measured for the entire solar cycle is compared with the solar index of the effective cycles for the years 1986-2015. The solar activity indices include numerous quantities. Of these indices the two most used are the relative sunspot number, covering more than 300 years and the 10.7cm solar radio flux (F10.7), which has been measured regularly since 1947. The data published in the official website of National Oceanic and Atmospheric Administration (NOAA) has been used in the analysis. This study examines the relative sunspot number and 10.7cm solar radio flux indices individually and also the relation between them, and also what it implies on the solar behaviour for the solar cycle 22, 23 & 24.

Published in American Journal of Astronomy and Astrophysics (Volume 3, Issue 6)
DOI 10.11648/j.ajaa.20150306.11
Page(s) 87-92
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

SSN, Solar Radio Flux, Solar Activity, Indices, Data Analysis

References
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[2] Bruevich. E.A., Bruevich. V.V and Yakunina. G.V.,(2014), Changed relation between solar 10.7cm radio flux and some activity indices which describe the radiation at different altitudes of atmosphere during cycles 21-23, Journal of Astrophysics and Astronomy.35,1-15.
[3] Chatterjee. T.N.,(2001), On the application of information theory to the optimum state-space reconstruction of the short-term solar radio flux (10.7cm), and its prediction via a neural network, RAS. 323,101-108.
[4] Chatterjee. T.N and Das. T.K.,(1995), Relation between solar UV flux and 10.7cm radio emission, RAS. 274,858-860.
[5] Cong Huang., Dan-Dan Liu and Jing- Song Wang.,(2009), Forecast daily indices of solar activity, F10.7, using support vector regression method, Research in Astron. Astrophys. 9, 694-702.
[6] David. H. Hathaway., Dibyendu Nandy., Robert. M. Wilson and Edwin. J. Reichmann.,(2003), Evidence that a deep meridional flow sets the sunspot cycle period, The Astrophysical Journal. 589,665-670.
[7] Elena Saiz., Yolanda Cerrato., Consuelo Cid., Venera Dobrica., Pavel Hejda., Petko Nenovski., Peter staining., Josef Bochnicek., Dimitar Danov., Crisan Demetrescu., Walter D. Gonzalez., Georgeta Maris., Dimitar Teodosiev and Fridich Valach., (2013), Geomagnetic response to solar and interplanetary disturbances, Journal of Space Weather Space Climate. DOI: 10.1051/swsc/2013048.
[8] Ivan Kutiev., Ioanna Tsagouri., Loredana Perrone., Dora Pancheva., Plamen Mukhtarov., Andrei Mikhailov., Jan Lastovicka., Norbert Jakowski., Dalia Buresova., Estefania Blanch., Borislav Andonov., David Altadill., Sergio Magdaleno., Mario Parisi and Joan Miquel Torta., (2013), Solar activity impact on the Earth’s upper atmosphere, Journal of Space Weather Space Climate. DOI: 10.1051/swsc/2013028.
[9] John Xanthakis and Constantine Poulakos.,(1985), Long and short term variation of the 10.7cm solar flux. The photospheric granules and the Zurich Numbers, Journal of Astrophysics and Space Science. 111,179-188.
[10] Leif Svalgaard., (2013), Solar activity – past, present, future, Journal of Space Weather Space Climate. DOI: 10.1051/swsc/2013046.
[11] Livingston. W., Penn. M.J and Svalgaard. L.,(2012) Decreasing sunspot magnetic fields explain unique 10.7cm radio flux, The Astrophysical Journal Letters.757,1-4.
[12] Mathieu Barthelemy and Gael Cessateur., (2014), Sensitivity of upper atmospheric emissions calculations to solar/stellar UV flux, Journal of Space Weather Space Climate. DOI:10.1051/swsc/2014033.
[13] Matthieu Kretzschmar., Ingolf E. Dammasch., Marie Dominique., Joe Zender., Gael Cessateur and Elke D Huys., (2012), Extreme ultraviolet solar irradiance during the rising phase of solar cycle 24 observed by PROBA2/LYRA, Journal of Space Weather Space Climate. DOI: 10.1051/swsc/2012014.
[14] Saha. U, M.Sc., Midya. S.K, Ph.D and Das. G.K, M.Sc.,(2011),The effect of the variable component of 10.7cm solar flux on the thunderstorm frequency over Kolkata and its relation with ozone depletion mechanism, The Pacific Journal of Science and Technology.12, 591- 597.
[15] Thierry Dudok de Wit., Sean Bruinsma and Kiyoto Shibasaki., (2014), Synoptic radio observations as proxies for upper atmosphere modeling, Journal of Space Weather Space Climate. DOI: 10.1051/swsc/2014003.
[16] Varotsos. C.A, Dris. N.A, Asimakopoulos. D.N and Cartalis. C.,(1992), On the relationship between the 10.7cm solar flux, surface pressure and air temperature over Greece, Journal of Theor.Appl.Climatol.46,27-32.
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  • APA Style

    Antony Dhivya Tharshini S., Shanthi G. (2015). The Study of Solar Activity in Relation with High Frequency Variations of Solar Radio Flux. American Journal of Astronomy and Astrophysics, 3(6), 87-92. https://doi.org/10.11648/j.ajaa.20150306.11

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    ACS Style

    Antony Dhivya Tharshini S.; Shanthi G. The Study of Solar Activity in Relation with High Frequency Variations of Solar Radio Flux. Am. J. Astron. Astrophys. 2015, 3(6), 87-92. doi: 10.11648/j.ajaa.20150306.11

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    AMA Style

    Antony Dhivya Tharshini S., Shanthi G. The Study of Solar Activity in Relation with High Frequency Variations of Solar Radio Flux. Am J Astron Astrophys. 2015;3(6):87-92. doi: 10.11648/j.ajaa.20150306.11

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  • @article{10.11648/j.ajaa.20150306.11,
      author = {Antony Dhivya Tharshini S. and Shanthi G.},
      title = {The Study of Solar Activity in Relation with High Frequency Variations of Solar Radio Flux},
      journal = {American Journal of Astronomy and Astrophysics},
      volume = {3},
      number = {6},
      pages = {87-92},
      doi = {10.11648/j.ajaa.20150306.11},
      url = {https://doi.org/10.11648/j.ajaa.20150306.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajaa.20150306.11},
      abstract = {In recent years, radio observations of solar emission at 10.7cm wavelengths show a systematic increase compared to the sunspot number (SSN). The 10.7cm solar radio flux (F10.7) is one of the most widely used indices of solar activity. The solar magnetic field flux measured for the entire solar cycle is compared with the solar index of the effective cycles for the years 1986-2015. The solar activity indices include numerous quantities. Of these indices the two most used are the relative sunspot number, covering more than 300 years and the 10.7cm solar radio flux (F10.7), which has been measured regularly since 1947. The data published in the official website of National Oceanic and Atmospheric Administration (NOAA) has been used in the analysis. This study examines the relative sunspot number and 10.7cm solar radio flux indices individually and also the relation between them, and also what it implies on the solar behaviour for the solar cycle 22, 23 & 24.},
     year = {2015}
    }
    

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    T1  - The Study of Solar Activity in Relation with High Frequency Variations of Solar Radio Flux
    AU  - Antony Dhivya Tharshini S.
    AU  - Shanthi G.
    Y1  - 2015/10/31
    PY  - 2015
    N1  - https://doi.org/10.11648/j.ajaa.20150306.11
    DO  - 10.11648/j.ajaa.20150306.11
    T2  - American Journal of Astronomy and Astrophysics
    JF  - American Journal of Astronomy and Astrophysics
    JO  - American Journal of Astronomy and Astrophysics
    SP  - 87
    EP  - 92
    PB  - Science Publishing Group
    SN  - 2376-4686
    UR  - https://doi.org/10.11648/j.ajaa.20150306.11
    AB  - In recent years, radio observations of solar emission at 10.7cm wavelengths show a systematic increase compared to the sunspot number (SSN). The 10.7cm solar radio flux (F10.7) is one of the most widely used indices of solar activity. The solar magnetic field flux measured for the entire solar cycle is compared with the solar index of the effective cycles for the years 1986-2015. The solar activity indices include numerous quantities. Of these indices the two most used are the relative sunspot number, covering more than 300 years and the 10.7cm solar radio flux (F10.7), which has been measured regularly since 1947. The data published in the official website of National Oceanic and Atmospheric Administration (NOAA) has been used in the analysis. This study examines the relative sunspot number and 10.7cm solar radio flux indices individually and also the relation between them, and also what it implies on the solar behaviour for the solar cycle 22, 23 & 24.
    VL  - 3
    IS  - 6
    ER  - 

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Author Information
  • Department of Physics and Research Centre, Women’s Christian College, Nagercoil, India

  • Department of Physics and Research Centre, Women’s Christian College, Nagercoil, India

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