Some results of observations of solar radio bursts of the ''drifting pairs'' type near frequencies of 25 and 12. 5 MHz

Journal Article · Sat Jan 01 00:00:00 EST 1977 · Sov. Astron. AJ (Engl. Transl.); (United States)

OSTI ID:7209967

Abranin, E P; Bazelyan, L L; Goncharov, N Y; Zaitsev, V V; Zinichev, V A; Levin, B N; Rapoport, V O; Tsybko, Y G

The double structure of solar radio bursts of the drifting pairs type is usually associated with the effect of a radio echo in the regular spherically symmetrical solar corona. In this case it is assumed that these double bursts originate at a frequency close to the second harmonic of the local plasma frequency in the region of generation. In the present report on the basis of observations of drifting pairs in the frequency ranges of 12--13 and 24--26 MHz it is shown that double bursts can be observed both at the second and at the first harmonic. The time interval between the elements of the double burst remains almost constant in this case. This circumstance creates serious difficulties in an interpretation of double bursts through the effect of a radio echo in the solar corona. The hypothesis is advanced that the double (and multiple in general) structure of the bursts may be connected with the successive passage of a beam of fast electrons through regions of double plasma resonance. Here it is assumed that the radiation originates through a cyclotron instability at the leading front of the electron beam moving along the decreasing magnetic field of a coronal ray. It is shown that the properties of these bursts can be explained using the proposed mechanism of formation of drifting pairs.

• Research Organization: Institute of Radiophysics and Electronics, Academy of Sciences of the Ukrainian SSR, Khar'kov.
• OSTI ID: 7209967
• Journal Information: Sov. Astron. AJ (Engl. Transl.); (United States), Vol. 21:1
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
SOLAR RADIO BURSTS
MAGNETIC FIELDS
ENERGY SPECTRA
LANGMUIR FREQUENCY
PLASMA INSTABILITY
SOLAR CORONA
SOLAR RADIOWAVE RADIATION
ELECTROMAGNETIC RADIATION
INSTABILITY
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
SOLAR RADIATION
SPECTRA
640104* - Astrophysics & Cosmology- Solar Phenomena