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Preprint Sep 2026

Direct imaging of sub-parsec binary SMBHs in the central galaxy of the NGC 5044 group

Binary active galactic nuclei (AGN) consist of two supermassive black holes (SMBHs) hosted in a single galaxy that are simultaneously accreting gas. These systems are key to understanding hierarchical galaxy evolution and represent prime targets for low-frequency gravitational wave (GW) experiments. However, binary AGN...

F. Ubertosi, G. Schellenberger, E. O'Sullivan et al. · 0 citations
Preprint Oct 2026

Exemplary Merging Clusters II: XMM-Newton and Chandra X-ray Observations of MACS J1752.0+4440 and ZwCl 1856.8+6616

Using deep XMM-Newton and Chandra observations, we compare the double-radio-relic galaxy cluster mergers MACS J1752.0+4440 and ZwCl 1856.8+6616. Both are 1:1 mass-ratio mergers with similar relic separations but differing nearly an order of magnitude in total mass. In MACS J1752.0+4440, the surface-brightness discontin...

K. HyeongHan, K. Finner, W. Lee et al. · 0 citations

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