@Article{KaufmannCaCoCoRaVa:2009:RaPuSu,
               author = "Kaufmann, Pierre and Castro, C. Guillermo Gimenez de and Correia, 
                         Emilia and Costa, Joaquim Eduardo Rezende and Raulin, Jean-Pierre 
                         and Valio, Adriana Silva",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Rapid pulsations in sub-THz solar bursts",
              journal = "Astrophysical Journal",
                 year = "2009",
               volume = "697",
               number = "1",
                pages = "420--427",
                month = "May",
             keywords = "solar bursts, radio emission, submillimeter.",
             abstract = "A new solar burst emission spectral component has been found 
                         showing sub-THz fluxes increasing with frequency, spectrally 
                         separated from the well known microwave component. Rapid 
                         pulsations are found present in all events observed at the two 
                         frequencies of the solar submillimeter-wave telescope: 212 and 405 
                         GHz. They were studied in greater detail for three solar bursts 
                         exhibiting the new THz spectral component. The pulse amplitudes 
                         are of about 5%-8% of the mean flux throughout the bursts 
                         durations, being comparable for both frequencies. Pulsations range 
                         from one pulse every few seconds to 8-10 per second. The pulse 
                         repetition rates (R) are linearly proportional to the mean burst 
                         fluxes (S), following the simple relationship S = kR, suggesting 
                         that the pulsations might be the response to discrete flare 
                         particle accelerator injections quantized in energy. Although this 
                         result is consistent with qualitative trends previously found in 
                         the GHz range, the pulse amplitude relative to the mean fluxes at 
                         the sub-THz frequencies appear to be nearly ten times smaller than 
                         expected from the extrapolation of the trends found in the GHz 
                         range. However there are difficulties to reconcile the nearly 
                         simultaneous GHz and THz burst emission spectrally separated 
                         components, exhibiting rapid pulsations with considerably larger 
                         relative intensities in the GHz range.",
                  doi = "10.1088/0004-637X/697/1/420",
                  url = "http://dx.doi.org/10.1088/0004-637X/697/1/420",
                 issn = "0004-637X and 1538-4357",
             language = "en",
           targetfile = "0004-637X_697_1_420.pdf",
        urlaccessdate = "04 maio 2024"
}