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A direct black-hole mass measurement in a little red dot at high redshift

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By Cosimo Marconcini, Francesco d’Eugenio, Roberto Maiolino, Alessandro Caviglia Marconi, Hannah Übler, Jan Scholtz, Xihan Ji, Gareth Jones, Michele Perna, Santiago Arribas, Jake Bennett, Andrew Bunker, Stefano Carniani, Stephane Charlot, Giovanni Cresci, Pratika Dayal, Eiichi Egami, Andrew Fabian, Kohei Inayoshi, Yuki Isobe, Lucy Ivey, Nicolas Laporte, Boyuan Liu, Jianwei Lyu, Stephanie Monty, Eleonora Parlanti, Pablo G. Pérez-González, Brant E. Robertson, Raffaella Schneider, Debora Sijacki, Sandro Tacchella, Alessandro Trinca, Rosa Valiante, Marta Volonteri, Joris Witstok, Saiyang Zhang, Volker Bromm, Sophie Koudmani, Giovanni Mazzolari
| Nature Verified
Abstract Recent discoveries of faint active galactic nuclei (AGN) at the redshift frontier have revealed a plethora of broad Hα emitters with optically red continua, named little red dots (LRDs)1, which comprise 15–30% of the high-redshift broad-line AGN population2. Owing to their peculiar properties3,4,5,6, modelling LRDs with standard AGN scenarios has proven challenging.
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