Radio emission of the NGC 1499 nebula at decametric wavelengths |
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| Authors: | V V Krymkin |
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| Institution: | (1) Institute of Radiophysics and Electronics, The Ukrainian S.S.R. Academy of Sciences, Kharkov, U.S.S.R. |
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| Abstract: | Observations of the ionized hydrogen region NGC 1499 have been carried out with the radio telescope UTR-2 at frequencies 12.6, 14.7, 16.7, 20 and 25 MHz. The half-power resolution of the instrument to zenith is 28 ×34 at 25 MHz. The average volume density of the non-thermal radio emission between the Sun and the nebula (1.75×10–40 W m–3 Hz–1 ster–1 at 25 MHz), the electron temperature of the HII nebula (T
e
=4400 K), the measure of emission (ME=1500 cm–6 pc) and other parameters have been obtained. Maps of brightness distribution over the source are presented for each observation frequency. The results are compared with previously obtained data. |
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