J13: Solar radio emission: astrophysics and space weather applications

Thursday, August 21  13:40-15:40,  Room #12

Session Chairs: Yihua Yan, Karl-Ludwig Klein

Several multi-purpose or solar-dedicated radio telescopes have recently started operations: the Chinese Spectral Radio heliograph (CSRH) in the decimetre band, LOFAR and MWA at metre wavelengths. They open new windows to the observation of the quiet and active Sun. At the same time existing facilities continue to produce significant results. All will remain important in the near future as a ground-based support for the major space projects in solar and heliospheric physics, Solar Orbiter and Solar Probe +. Due to their sensitivity to large-scale disturbances of the corona and the Heliosphere and to energetic electrons, radio emissions are also a tool for space weather predictions. This session has the objective to present the new instruments and their first solar observations, to show new results of radio and multi-wavelength studies for the on-going solar maximum, and to discuss space weather investigations, where solar radio emission may as well be a hazard (GPS) as a valuable tool for research and predictions.

13:40  J13.1   DECLINE IN SOLAR POLAR MAGNETIC FIELDS AND HELIOSPHERIC MICRO-TURBULENCE LEVELS: ARE WE HEADED TOWARDS A MAUNDER MINIMUM?

S. K. Bisoi1, P. Janardhan1, S. Ananthakrisnan2

1Astronomy and Astrophysics, Physical Research Laboratory, Ahmedabad, India
2Department of Electronic Science, Pune University, Pune, India


14:00  J13.2   PHYSICAL QUESTIONS RAISED BY FREQUENCY-INCREASING SUB-THZ SOLAR FLARE EMISSIONS AND A NEW TOOL TO REVEAL THZ SPECTRAL SHAPES

P. Kaufmann

Engineering School, CRAAM, Universidade Presbiteriana Mackenzie, Sao Paulo, SP, Brazil


14:20  J13.3   SOLAR PHYSICS WITH THE CHINESE RADIOHELIOGRAPH

W. Wang1, Y. Yan1, F. Liu1, L. Geng1, Z. Chen1, J. Zhang2, L. Chen1, D. Liu1

1Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
2Department of Astronomy, school of physics, Peking University, Beijing, China


14:40  J13.4   SOLAR PHYSICS WITH LOFAR

C. Vocks, G. Mann, F. Breitling

Leibniz-Institut für Astrophysik Potsdam, Potsdam, Germany


15:00  J13.5   OBSERVING THE SUN WITH THE MURCHISON WIDEFIELD ARRAY

D. Oberoi1, M. W. A Collaboration2

1National Centre for Radio Astrophysics - Tata Institute of Fundamental Research, Pune, Maharashtra, India
2MWA Collaboration, Perth, Australia


15:20  J13.6   TWO GROUPS OF MICROWAVE TYPE U AND RS BURSTS ON 15 FEBRUARY 2011

Y. Xue, S. Wang, Y. Yan

Solar Physics Division, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China