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@article{2264457,
author = {Wójtowicz, Anna Patrycja and Stawarz, Łukasz and Cheung, C. C. and Werner, Norbert and Rudka, Dominik},
article_number = {2},
doi = {http://dx.doi.org/10.3847/1538-4357/acb498},
keywords = {Radio active galactic nuclei; Radio galaxies; Radio cores; Early-type galaxies; Radio jets},
language = {eng},
issn = {0004-637X},
journal = {Astrophysical Journal},
title = {Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range},
url = {https://doi.org/10.3847/1538-4357/acb498},
volume = {944},
year = {2023}
}
TY - JOUR
ID - 2264457
AU - Wójtowicz, Anna Patrycja - Stawarz, Łukasz - Cheung, C. C. - Werner, Norbert - Rudka, Dominik
PY - 2023
TI - Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range
JF - Astrophysical Journal
VL - 944
IS - 2
SP - 1-23
EP - 1-23
PB - IOP Publishing Ltd
SN - 0004637X
KW - Radio active galactic nuclei
KW - Radio galaxies
KW - Radio cores
KW - Early-type galaxies
KW - Radio jets
UR - https://doi.org/10.3847/1538-4357/acb498
N2 - We analyze radio continuum emission of early-type galaxies with dynamical measurements of central supermassive black hole (SMBH) masses and well-characterized large-scale environments, but regardless of the exact level of the nuclear activity. The 1.4 GHz radio fluxes collected with ∼arcmin resolution for 62 nearby targets (distances ≲153 Mpc) correspond to low and very low monochromatic luminosities of Lr ∼ 1035–1041 erg s−1. We quantify possible correlations between the radio properties with the main parameters of SMBHs, 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 at $\mathrm{log}{L}_{{\rm{r}}}/{L}_{\mathrm{Edd}}\simeq -8.5$. We analyze the far-infrared data for the targets, finding that all radio-bright and over a half of the radio-dim sources are overluminous in radio wavelengths with respect to the far-infrared–radio correlation. High-resolution radio maps reveal that the overwhelming majority of radio-dim sources is unresolved on the arcsecond scale, while the bulk of radio-bright sources display extended jets and lobes of low- and intermediate-power radio galaxies; these jets dominate the radio emission of radio-bright objects. Regarding the origin of the radio emission of radio-dim sources, we discuss two main possibilities. One possibility is the advection-dominated accretion flow model, in which the radio and 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 star-forming processes and previous nuclear outbursts.
ER -
WÓJTOWICZ, Anna Patrycja, Łukasz STAWARZ, C. C. CHEUNG, Norbert WERNER a Dominik RUDKA. Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range. \textit{Astrophysical Journal}. IOP Publishing Ltd, 2023, roč.~944, č.~2, s.~1-23. ISSN~0004-637X. Dostupné z: https://dx.doi.org/10.3847/1538-4357/acb498.
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