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Observations of Solar Flares from GHz to THz Frequencies

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The Sun: New Challenges

Part of the book series: Astrophysics and Space Science Proceedings ((ASSSP,volume 30))

Abstract

The discovery of a new solar burst spectral component with sub-THz fluxes increasing with frequency, simultaneous but separated from the well known microwave component, brings serious constraints for interpretation. Suggested explanations are briefly reviewed. They are inconclusive indicating that further progresses on the understanding of nature of the emission mechanisms involved require the knowledge of GHz to THz continuum burst spectral shapes. New 45 and 90 GHz high sensitivity solar polarimeters are being installed at El Leoncito high altitude observatory, where sub-THz (0.2 and 0.4 THz) solar flare flux data are being obtained regularly since several years. Solar flare THz photometry in the continuum should be carried in space or at few selected frequency windows at exceptional ground-based sites. A dual photometer system, operating at 3 and 7 THz, is being constructed to be flown in a long duration stratospheric balloon flight in Antarctica (summer 2013–2014) in cooperation with University of California, Berkeley, together with GRIPS experiment. One test flight is planned for the fall 2012 in USA. Another long duration balloon flight over Russia is considered (2015–2016), in a cooperation with Moscow Lebedev Physics Institute.

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Acknowledgements

These researches receive partial support from Brazilian agencies FAPESP, CNPq, INCT–NAMITEC–CNPq, Mackpesquisa, Argentina agency CONICET and US agency AFOSR.

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Authors and Affiliations

  1. Center for Radio Astronomy and Astrophysics, Escola de Engenharia, Universidade Presbiteriana Mackenzie, São Paulo, Brazil

    Pierre Kaufmann

  2. Center for Semiconductor Components, Universidade Estadual de Campinas, Campinas, SP, Brazil

    Pierre Kaufmann

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  1. Pierre Kaufmann
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Correspondence to Pierre Kaufmann .

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Editors and Affiliations

  1. IZMIRAN, xx, Troitsk Moscow region, 142190, Russia

    Vladimir N. Obridko

  2. SSTRI-BAS, Moskovska str. 6, Sofia, 1000, Bulgaria

    Katya Georgieva

  3. Pulkovo Observatory, Pulkovskoe shausse 65/1, Saint Petersburg, 196140, Russia

    Yury A. Nagovitsyn

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Kaufmann, P. (2012). Observations of Solar Flares from GHz to THz Frequencies. In: Obridko, V., Georgieva, K., Nagovitsyn, Y. (eds) The Sun: New Challenges. Astrophysics and Space Science Proceedings, vol 30. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29417-4_6

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  • DOI: https://doi.org/10.1007/978-3-642-29417-4_6

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