Author

F. Mannucci

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Preprint Oct 2026

MARTA: A"little"black hole hidden in a clumpy, metal-poor galaxy at z~3.8

JWST has extended the search for accreting black holes into the high-redshift, low-mass regime. We report a low-mass black hole candidate in MARTA 3887, a clumpy, metal-poor galaxy at $z=3.7694$, combining deep JWST/NIRSpec spectroscopy, HST and JWST imaging, and archival VLT/MUSE data. We detect a broad H$\alpha$ comp...

M. Curti, B. Moreschini, E. Cataldi et al. · 0 citations

Preprint Sep 2026

GA-NIFS: sRMS, a new method for disentangling resolved and unresolved emission in integral field spectroscopy. Application to distant quasars

The interpretation of AGN emission-line profiles in type1 AGN is often complicated by the dominance of bright, spatially unresolved nuclear continuum and broad-line region (BLR) emission over narrower and blended components from the narrow-line region (NLR) and the host galaxy. This remains challenging even with integr...

M. Perna, S. Arribas, C. Prieto-Jim'enez et al. · 0 citations