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- W1999700270 abstract "Current estimates of number counts of radio sources in the frequency range where the most sensitive Cosmic Microwave Background (CMB) experiments are carried out significantly under-represent sources with strongly inverted spectra. Hot accretion flows around supermassive black holes in the nuclei of nearby galaxies are expected to produce inverted radio spectra by thermal synchrotron emission. We calculate the temperature fluctuations and power spectra of these sources in the Planck Surveyor 30 GHz energy channel, where their emission is expected to peak. We find that their potential contribution is generally comparable to the instrumental noise, and approaches the CMB anisotropy level at small angular scales. Forthcoming CMB missions, which will provide a large statistical sample of inverted-spectra sources, will be crucial for determining the distribution of hot accretion flows in nearby quiescent galactic nuclei. Detection of these sources in different frequency channels will help constrain their spectral characteristics, hence their physical properties." @default.
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- W1999700270 date "2000-10-10" @default.
- W1999700270 modified "2023-09-24" @default.
- W1999700270 title "Synchrotron Emission from Hot Accretion Flows and the Cosmic Microwave Background Anisotropy" @default.
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- W1999700270 doi "https://doi.org/10.1086/309544" @default.
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