GA-NIFS: A massive black hole in a low-metallicity AGN at<i>z</i> ∼ 5.55 revealed by JWST/NIRSpec IFS

Journal article

In the local Universe, the ratio between the mass of a central black hole and the stellar mass of its host galaxy is $\sim 0.1 \%$. Recently, JWST discovered numerous galaxies at $z>4$ that seem to deviate from the local relation, with black holes overmassive by $10-100$ times. Similar galaxies were also discovered at cosmic noon. The intrinsic scatter in the relation describes how much the evolutionary histories of the single galaxies deviate from the mean evolutionary pattern of their parent dataset. This Research Note examines whether a cosmic evolution of the intrinsic scatter can be detected by assessing its value for datasets in various redshift ranges. Using data from the local Universe ($z < 0.055$), low ($ 0.4 \leq z \leq 0.9$), intermediate ($ 0.9 \leq z \leq 4$), and high ($z > 4$) redshift, we conclude that there is no statistically significant redshift evolution of the intrinsic scatter.Comment: Accepted on Research Notes of the AAS. This is a concise note (3 pages, 1 figure) regarding the direct application of the model described in arXiv:2308.12331 to various datasets of overmassive black holes in various redshift range

Authors: Übler, H; Maiolino, R; Curtis-Lake, E; Pérez-González, PG; Curti, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: EDP Sciences
• Journal: Astronomy & Astrophysics
• Volume: 677
• Pages: A145-A145
• Publication date: 2023-07-17
• Acceptance date: 2023-06-21
• DOI: 10.1051/0004-6361/202346137
• EISSN: 1432-0746
• ISSN: 0004-6361
• Language: English
• Keywords: Line (geometry); Spectral line; Active galactic nucleus; Luminosity; Galaxy cluster; Metallicity; Astrophysics; Black hole (networking); Doubly ionized oxygen; Virial mass; Physics; Astronomy; Redshift; Emission spectrum; Star formation; Galaxy