Gas-poor Hosts and Gas-rich Companions of z ≈ 3.5 Radio Active Galactic Nuclei: ALMA Insights into Jet Triggering and Feedback

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F25%3A00646413" target="_blank" >RIV/67985815:90106/25:00646413 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3847/2041-8213/ade675" target="_blank" >https://doi.org/10.3847/2041-8213/ade675</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/2041-8213/ade675" target="_blank" >10.3847/2041-8213/ade675</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Gas-poor Hosts and Gas-rich Companions of z ≈ 3.5 Radio Active Galactic Nuclei: ALMA Insights into Jet Triggering and Feedback

Popis výsledku v původním jazyce

Cold gaseous systems play important roles in galaxy evolution by possibly providing fuel to ignite active galactic nuclei (AGN) activity and star formation. In this work, we analyze [C ii]158 mu m and continuum observations from the Atacama Large Millimeter/submillimeter Array for a sample of four radio AGN at z approximate to 3.5, focusing on eight associated companion cloud systems discovered within projected distances of tens of kiloparsecs or less. The spatial distribution of these companions indicates that the majority of cold gas is not located at the AGN position, i.e., not in their host galaxies. With the assistance of [C ii] at 02 resolution, we further confirm the gas-poor nature of the hosts by reanalyzing archival [C i] (a tracer of H-2) at similar to 2 '' resolution. Our sample has [C ii] luminosities in a range of 2.8 x 10(8) < L-[C II]/L-circle dot < 4.2 x 10(9). The L-[C II]/L-IR ratio, similar to 9.4 x 10(-4), is consistent with sources discussed in the literature. Our findings show the gas-poor radio AGN hosts have nearby gas-rich companions. We propose that these companions may be stripped clouds resulting from merger processes, which could be a trigger of radio-loud AGN. They may also be a signature of negative AGN feedback (e.g., shock heating) on these infalling companions and on the host galaxy. In general, our analysis shows that powerful AGN at and before Cosmic Noon are impacting and being impacted by cold gaseous clouds in their circumgalactic or protointracluster media.

Název v anglickém jazyce

Gas-poor Hosts and Gas-rich Companions of z ≈ 3.5 Radio Active Galactic Nuclei: ALMA Insights into Jet Triggering and Feedback

Popis výsledku anglicky

Cold gaseous systems play important roles in galaxy evolution by possibly providing fuel to ignite active galactic nuclei (AGN) activity and star formation. In this work, we analyze [C ii]158 mu m and continuum observations from the Atacama Large Millimeter/submillimeter Array for a sample of four radio AGN at z approximate to 3.5, focusing on eight associated companion cloud systems discovered within projected distances of tens of kiloparsecs or less. The spatial distribution of these companions indicates that the majority of cold gas is not located at the AGN position, i.e., not in their host galaxies. With the assistance of [C ii] at 02 resolution, we further confirm the gas-poor nature of the hosts by reanalyzing archival [C i] (a tracer of H-2) at similar to 2 '' resolution. Our sample has [C ii] luminosities in a range of 2.8 x 10(8) < L-[C II]/L-circle dot < 4.2 x 10(9). The L-[C II]/L-IR ratio, similar to 9.4 x 10(-4), is consistent with sources discussed in the literature. Our findings show the gas-poor radio AGN hosts have nearby gas-rich companions. We propose that these companions may be stripped clouds resulting from merger processes, which could be a trigger of radio-loud AGN. They may also be a signature of negative AGN feedback (e.g., shock heating) on these infalling companions and on the host galaxy. In general, our analysis shows that powerful AGN at and before Cosmic Noon are impacting and being impacted by cold gaseous clouds in their circumgalactic or protointracluster media.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

—

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal Letters

ISSN

2041-8205

e-ISSN

2041-8213

Svazek periodika

987

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

L37

Kód UT WoS článku

001525574000001

EID výsledku v databázi Scopus

2-s2.0-105010312455