Abstract
Radio emission of the historical supernovae remnants Tycho (SNR1572) and Kepler (SNR1604) and evolution of their luminosity are considered. Measurement data of secular luminosity decrease rate, obtained earlier by the authors, were corrected with account of variation in time of the flux density of the reference sources. As a result, it is found that the SNR1604 luminosity at 1667 MHz is weakening with an annual mean rate equal to (0.2 ± 0.07)%. The corresponding rate for SNR1572 is (0.47 ± 0.05)%. Since the radio luminosity evolution, as well as energy densities of magnetic field and relativistic electrons inside SNR1604 and SNR1572 are essentially different, these remnants should be considered as different types of supernovae. Bandiera classified SN1604 as type SNIb or SNII.
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Stankevich, K.S., Aslanyan, A.M., Ivanov, V.P. et al. Evolution of the Radio Luminosities of the Tycho and Kepler Supernovae Remnants. Astrophysics 46, 429–433 (2003). https://doi.org/10.1023/B:ASYS.0000003258.04439.f3
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DOI: https://doi.org/10.1023/B:ASYS.0000003258.04439.f3