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• W4322494073 endingPage "195" @default.
• W4322494073 startingPage "195" @default.
• W4322494073 abstract "We analyze radio continuum emission of early-type galaxies with dynamical measurements of central super-massive black hole (SMBH) masses, and well-characterized large-scale environments, but regardless on the exact level of the nuclear activity. The 1.4 GHz radio fluxes collected with $sim$arcmin resolution for 62 nearby targets (distances $lesssim$ 153 Mpc), correspond to low and very low monochromatic luminosities $L_{rm r} sim 10^{35} - 10^{41}$ erg s$^{-1}$. We quantify possible correlations between the radio properties with the main parameters of supermassive black holes, host galaxies, and hot gaseous halos, finding a general bimodality in the radio luminosity distribution, with the borderline between ``radio-bright'' and ``radio-dim'' populations $log L_{rm r} / L_{rm Edd} simeq -8.5$. We analyze the far-infrared data for the targets, finding that all radio-bright sources, and over a half of radio-dim ones, are over-luminous in radio with respect to the far-infrared--radio correlation. High-resolution radio maps reveal that the overwhelming majority of radio-dim sources are unresolved on arcsecond scale, while the bulk of radio-bright sources display extended jets and lobes of low- and intermediate-power radio galaxies; those jets dominate radio emission of radio-bright objects. Regarding the origin of the radio emission of radio-dim sources, we discuss the two main possibilities. One is the ADAF model, in which the radio and the nuclear X-ray radiative outputs at very low accretion rates, are both dominated by unresolved jets. The other possibility is that the radio-dim sources, unlike the radio-bright ones, are characterized by low values of SMBH spins, so that their radio emission is not related to the jets, but instead is due to a combination of starforming processes and past nuclear outbursts." @default.
• W4322494073 created "2023-02-28" @default.
• W4322494073 creator A5015518872 @default.
• W4322494073 creator A5038204670 @default.
• W4322494073 creator A5049216821 @default.
• W4322494073 creator A5058309297 @default.
• W4322494073 creator A5078897197 @default.
• W4322494073 date "2023-02-01" @default.
• W4322494073 modified "2023-10-01" @default.
• W4322494073 title "Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range" @default.
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