Abstract
The VATLY radio telescope, operating at 1.415 GHz in Ha Noi, has been used to track the Sun in the summer – autumn months in 2012. Evidence has been obtained for solar activity, including occasional flares and variable oscillations with amplitudes at the percent level and periods of about 6 min. Comparison with data collected at the same frequency by the Learmonth Observatory in Australia suggests that the observed oscillations were associated with solar activity. A joint analysis of both data sets is presented, evaluating the correlations between them. We describe the common and different main features.
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Notes
Australian Government, Bureau of Meteorology, Radio and Space Weather Services, http://www.ips.gov.au/World_Data_Centre/1/10 .
NOAA/NGDC, http://www.ngdc.noaa.gov/stp/solar/solarflares.html .
Australian Government, Bureau of Meteorology, Radio and Space Weather Services, http://www.ips.gov.au/Satellite/6/3 .
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Acknowledgements
We are deeply indebted to the Learmonth Solar Observatory staff, who are making their data available to the public, and particularly to Dr. Owen Giersch for kindly answering many of our questions related to these data. Financial and/or material support from the Institute for Nuclear Science and Technology, Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 103.08-2012.34, the World Laboratory and Odon Vallet fellowships is gratefully acknowledged.
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Hiep, N.V., Nhung, P.T., Darriulat, P. et al. Radio Observation of Solar-Activity-Related mHz Oscillations. Sol Phys 289, 939–950 (2014). https://doi.org/10.1007/s11207-013-0356-y
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DOI: https://doi.org/10.1007/s11207-013-0356-y