Dust in Little Red Dots
Caitlin M. Casey, Hollis B. Akins, Vasily Kokorev, Jed McKinney,, Olivia R. Cooper, Arianna S. Long, Maximilien Franco, Sinclaire M. Manning

TL;DR
JWST observations of 'little red dots' at high redshift reveal they are compact, dust-rich objects with specific dust properties, but they contribute minimally to the cosmic dust budget due to their low dust masses.
Contribution
This study provides the first average dust property constraints for high-redshift LRDs, based on a large literature sample, highlighting their low dust masses and implications for galaxy evolution.
Findings
Average dust mass of LRDs is approximately 1.6×10^4 M_7
Spectral energy distributions peak around 100 K regardless of heating source
LRDs' low dust masses imply they contribute negligibly to cosmic dust budget
Abstract
JWST has revealed a ubiquitous population of ``little red dots'' (LRDs) at , selected via their red rest-frame optical emission and compact morphologies. They are thought to be reddened by dust, whether in tori of active galactic nuclei or the interstellar medium (ISM), though none have direct dust detections to date. Informed by the average characteristics of 675 LRDs drawn from the literature, we provide ballpark constraints on the dust characteristics of the LRD population and estimate they have average dust masses of , luminosities of and temperatures of K. Notably, the spectral energy distributions are thought to peak at 100 K (rest-frame 20-30 m) regardless of heating mechanism,…
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Taxonomy
TopicsPlant Surface Properties and Treatments · Indoor Air Quality and Microbial Exposure
