Initial stage of development of Type-4 radio bursts and relation to expanding magnetic bottles

Technical Report · Thu Mar 01 04:00:00 EST 1973

OSTI ID:4356291

Sakurai, K

Using observed data for wide-band Type IV solar radio bursts, the onset time differences between the microwave and metric frequencies and the peak flux intensities of the metric component were analyzed as a function of the longitudinal position of associated flares on the solar disk. It is shown that this time difference is dependent on the position of associated flares and that the peak flux 'intensity reaches maximum when a flare occurs in the region 10 to 40 deg west of the central meridian of the solar disk. These results are explained by taking into account the eastward expansion of magnetic bottles which trap mildly relativistic electrons responsible for Type IV bursts. Discussion is also rnade of the relation between these magnetic bottles and shock waves which excite Type II radio bursts. (auth) (STAR)

• Research Organization: National Aeronautics and Space Administration, Greenbelt, Md. (USA). Goddard Space Flight Center
• NSA Number: NSA-29-011008
• OSTI ID: 4356291
• Report Number(s): N--73-20844; NASA-TM-X--66217
• Country of Publication: United States
• Language: English

Related Subjects

*SOLAR FLARES-- MAGNETIC FIELDS
*SOLAR RADIO BURSTS-- FLUX DENSITY
ELECTRONS
EXPANSION
N56400* --Physics (Astrophysics & Cosmology)--Solar Phenomena
TIME DEPENDENCE