Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010a%26a...510l...6l&link_type=abstract
Astronomy and Astrophysics, Volume 510, id.L6
Astronomy and Astrophysics
Astrophysics
3
Sun: Radio Radiation, Sun: Corona, Methods: Numerical
Scientific paper
The electron temperature T_e and ion temperature T_i in the corona vary with time and location, due to transient and persistent activity on the Sun. The effects of spatially localized disturbances in T_e and T_i on coronal type III radio bursts are simulated. The disturbances are superimposed on monotonically varying temperature backgrounds and arise from spatially confined solar activity, Qualitatively and quantitatively different imprints are found on the curve of the maximum flux versus frequency of type III bursts, because of the disturbances in T_e and T_i. The results indicate that nonthermal coronal type III bursts offer a new tool to probe and distinguish between spatially localized structures of T_e and T_i along the paths of type III beams. Furthermore, localized temperature disturbances may be responsible for some fine structures in type III bursts, e.g., striae in type IIIb bursts in the presence of multiple, localized temperature disturbances.
Cairns Iver H.
Li Baowen
Robinson Adam P.
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