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arXiv · 2606.31436

Estimation of black hole spins in low-mass AGNs and comparison with other types of AGNs

M. Yu. Piotrovich·S. D. Buliga·T. M. Natsvlishvili
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Abstract

We estimated the spins of a sample of 58 low-mass AGNs. Analysis of the obtained spins showed that they decrease with increasing SMBH mass, leading us to hypothesize that mergers and/or chaotic accretion are the primary mechanisms for mass growth. In this regard, we proposed a more general hypothesis about the evolution of AGNs. We assume that early low-mass SMBHs have high spins, then, during their evolution, the spins initially decrease and then begin to increase, with the rate of increase gradually slowing.

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M. Yu. Piotrovich, S. D. Buliga, T. M. Natsvlishvili. 2026-06-30. Estimation of black hole spins in low-mass AGNs and comparison with other types of AGNs. https://doi.org/10.1103/6gsd-66wv

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