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- W2040991841 abstract "We investigate the radio spectral energy distributions (SEDs) of young star-forming galaxies and how they evolve with time. The duration and luminosity of the nonthermal radio emission from supernova remnants (SNRs) are constrained by using the observational radio SEDs of SBS 0335-052 and I Zw 18, which are the two lowest-metallicity blue compact dwarf galaxies in the nearby universe. The typical radio “fluence” for SNRs in SBS 0335-052, that is the radio energy emitted per SNR over its radiative lifetime, is estimated to be ~6– at 5 GHz. On the other hand, the radio fluence in I Zw 18 is ~1– at 5 GHz. We discuss the origin of this variation and propose scaling relations between synchrotron luminosity and gas density. We have also predicted the time dependence of the radio spectral index and of the spectrum itself, for both the “active” (SBS 0335-052) and “passive” (I Zw 18) cases. These models enable us to roughly age date and classify radio spectra of star-forming galaxies into active/passive classes. Implications for high-z galaxy evolution are also discussed." @default.
- W2040991841 created "2016-06-24" @default.
- W2040991841 creator A5000521954 @default.
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- W2040991841 date "2006-09-12" @default.
- W2040991841 modified "2023-09-26" @default.
- W2040991841 title "Time evolution of the radio continuum of young starbursts: the importance of synchrotron emission" @default.
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- W2040991841 doi "https://doi.org/10.1051/0004-6361:20065629" @default.
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