RADIO PHYSICS AND RADIO ASTRONOMY

The upper limit for the flux of a compact source of continuum radio emission in SNR 3C58, (2.7 ± 0.9) Jy, was obtained by the highest sensitive observations of interplanetary scintillations at decameter wavelengths. As the sensitivity of observations allows detecting the flux which could be expected at decameter wavelengths for the spectral index α ≈ 2.8 (as at frequencies above 100 MHz) the non-detection of compact source emission is explained by the less value of spectral index at low frequencies (the presence of the cut-off in radio emission spectrum).

Key words: supernova remnant, star remnant, interplanetary scintillation, decameter wavelength range

Radio phys. radio astron. 2014, 19(1): 3-9

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