Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00130411" target="_blank" >RIV/00216224:14310/23:00130411 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3847/1538-4357/acb498" target="_blank" >https://doi.org/10.3847/1538-4357/acb498</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/acb498" target="_blank" >10.3847/1538-4357/acb498</a>

Result language

angličtina

Original language name

Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GX21-13491X" target="_blank" >GX21-13491X: Exploring the Hot Universe and Understanding Cosmic Feedback</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Volume of the periodical

944

Issue of the periodical within the volume

2

Country of publishing house

GB - UNITED KINGDOM

Number of pages

23

Pages from-to

1-23

UT code for WoS article

000940998600001

EID of the result in the Scopus database

2-s2.0-85149369333