Gas-poor Hosts and Gas-rich Companions of z ≈ 3.5 Radio Active Galactic Nuclei: ALMA Insights into Jet Triggering and Feedback
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Gas-poor Hosts and Gas-rich Companions of z ≈ 3.5 Radio Active Galactic Nuclei: ALMA Insights into Jet Triggering and Feedback
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
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Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astrophysical Journal Letters
ISSN
2041-8205
e-ISSN
2041-8213
Volume of the periodical
987
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
L37
UT code for WoS article
001525574000001
EID of the result in the Scopus database
2-s2.0-105010312455