@Article{Kane:2002:PeTiSe,
               author = "Kane, Rajaram Purushottam",
                title = "Periodicities in the time series of solar coronal radio emissions 
                         and chromospheric UV emission lines",
              journal = "Solar Physics",
                 year = "2002",
               volume = "205",
               number = "2",
                pages = "351--359",
                month = "fev.",
             keywords = "GEOF{\'{\I}}SICA ESPACIAL, solar coronal radio, emissions, 
                         spectral analysis.",
             abstract = "A spectral analysis of the time series of daily values of ten 
                         solar coronal radio emissions in the range 275-1755 MHz, the 2800 
                         MHz radio flux, several UV emission lines in the chromosphere and 
                         in the transition region, and sunspot number, for six successive 
                         intervals of 132 days each, during June 1997-July 1999 (26 
                         months)showed that the spectral characteristics were not the same 
                         for all intervals. Details are presented for Interval 1, where 
                         there was no 27-day oscillation, and Interval 2, where there was a 
                         strong 27-day oscillation. In every interval, periodicities were 
                         remarkably similar in most of these indices, indicating that the 
                         solar atmosphere (chromosphere and corona)rotated as one block, up 
                         to a height of similar to 150 000 km. Above this height, the 
                         periodicities became obscure. Near the solar surface, sunspots 
                         showed extra or different periodicities, some of which vanished at 
                         low altitudes. For the 27-day feature as also for the long-term 
                         rise during 1996-1998, the maximum percentage changes were for 
                         radio emissions near 1350-1620 MHz.",
                 issn = "0038-0938 and 1573-093X",
                label = "10049",
             language = "en",
           targetfile = "Periodicities in the time series of solar coronal radio emissions 
                         and chromospheric UV emission lines.pdf",
        urlaccessdate = "20 maio 2024"
}