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Victor Herrero Radio Astronomy Blog

Structure of solar radio noise 150 to 432 MHz - combined observations of 4 storms with the Nancay Radioheliograph and the Giant Meterwave Radio telescope

26 Jun 2015, 19:25 UTC
Structure of solar radio noise 150 to 432 MHz - combined observations of 4 storms with the Nancay Radioheliograph and the Giant Meterwave Radio telescope
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With many thanks I refer to:Mercier Subramanian Chambe Janardhan 2014"The structure of solar radio noise storms"http://arxiv.org/abs/1412.8189http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1412.818927 References at:http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2015A%26A...576A.136M&link_type=REFERENCES&db_key=AST&high=  Abstract: "Context. The Nançay Radioheliograph (NRH) routinely produces snapshot images of the full sun (field of view ~3 R&sun;) at 6 or 10 frequencies between 150 and 450 MHz, with typical resolution 3 arcmin and time cadence 0.2 s. Combining visibilities from the NRH and from the Giant Meterwave Radio Telescope (GMRT) allows us to produce images of the sun at 236 or 327 MHz, with the same field as the NRH, a resolution as low as 20 arcsec, and a time cadence 2 s.Aims: We seek to investigate the structure of noise storms (the most common non-thermal solar radio emission) which is yet poorly known. We focus on the relation of position and altitude of noise storms with the observing frequency and on the lower limit of their sizes.Methods: We use an improved version of a previously used method for combining NRH and GMRT visibilities to get high-resolution composite images and to investigate the fine structure of noise storms. We also use the NRH data over several consecutive days around the common observation days to derive the altitude of storms at ...

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