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Solar Observations at Submillimeter Wavelengths

  • Chapter
Energy Conversion and Particle Acceleration in the Solar Corona

Part of the book series: Lecture Notes in Physics ((LNP,volume 612))

Abstract

We review earlier to recent observational evidences and theoretical motivations leading to a renewed interest to observe flares in the submillimeter (submm) - infrared (IR) range of wavelengths. We describe the new solar dedicated submillimeter wave telescope which began operations at El Leoncito in the Argentina Andes: the SST project. It consists of focal plane arrays of two 405 GHz and four 212 GHz radiometers placed in a 1.5-m radome-enclosed Cassegrain antenna, operating simultaneously with one millisecond time resolution. The first solar events analyzed exhibited the onset of rapid submm-wave spikes (100-300 ms), well associated to other flare manifestations, especially at X-rays. The spikes positions were found scattered over the flaring source by tens of arcseconds. For one event an excellent association was found between the gamma-ray emission time profile and the rate of occurrence of submm-wave rapid spikes. The preliminary results favour the idea that bulk burst emissions are a response to numerous fast energetic injections, discrete in time, produced at different spatial positions over the flaring region. Coronal mass ejections were associated to the events studied. Their trajectories extrapolated to the solar surface appear to correspond to the onset time of the submm-wave spikes, which might represent an early signature of the CME’s initial acceleration process.

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Author information

Authors and Affiliations

  1. CRAAM, Universidade Presbiteriana Mackenzie, São Paulo, SP, Brazil

    Pierre Kaufmann

  2. part-time researcher at CSS, UNICAMP, Campinas, SP, Brazil

    Pierre Kaufmann

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  1. Pierre Kaufmann
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Editors and Affiliations

  1. Observatoire de Paris, Section de Meudon, LESIA, 5, place Jules Janssen, 92195, Meudon Principal Cedex, France

    Karl-Ludwig Klein

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Kaufmann, P. (2003). Solar Observations at Submillimeter Wavelengths. In: Klein, KL. (eds) Energy Conversion and Particle Acceleration in the Solar Corona. Lecture Notes in Physics, vol 612. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36242-8_16

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  • DOI: https://doi.org/10.1007/3-540-36242-8_16

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-00275-8

  • Online ISBN: 978-3-540-36242-5

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