Radio emission from little red dots may reveal their true nature
Muhammad A. Latif, Ammara Aftab, Daniel J. Whalen, Mar Mezcua

TL;DR
This study estimates the radio emission from little red dots (LRDs) observed by JWST to determine if they are obscured AGN or starburst galaxies, predicting detectability with future radio surveys.
Contribution
It introduces a method to estimate radio fluxes from LRDs using black hole accretion models and stellar fluxes, aiding in their classification.
Findings
BH radio fluxes are 10-100 times higher than stellar fluxes in LRDs.
Detection of specific radio flux levels at high redshift indicates presence of AGN.
LRDs are likely radio quiet AGN, detectable with upcoming radio telescopes.
Abstract
The unprecedented sensitivity of the \textit{James Webb Space Telescope} (\textit{JWST}) has revolutionized our understanding of the early universe. Among the most intriguing \textit{JWST} discoveries are red, very compact objects showing broad line emission features nicknamed as little red dots (LRDs). The discovery of LRDs has triggered great interest about their origin as either extremely starbursting galaxies or highly-obscured active galactic nuclei (AGN). Their exact nature still remains unknown. The goal of this work is to estimate the radio emission from LRDs and predict which radio surveys would detect them. To achieve these objectives, we employ the fundamental plane of black hole (BH) accretion to estimate radio emission from AGN and the stellar radio fluxes from their host galaxies. We assume a range of BH mass, X-ray luminosity () and star formation rate (SFR) to…
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Taxonomy
TopicsDark Matter and Cosmic Phenomena · Bluetooth and Wireless Communication Technologies
