James Webb Space Telescope Feed Post

Harvard ADS: No evidence for a significant evolution of M_{\bullet}-M_* relation up to z\sim4

Paper abstract: Over the past two decades, tight correlations between black hole masses (M_\bullet) and their host galaxy properties have been firmly established at low-z (z<1), indicating coevolution of supermassive black holes and galaxies. However, the situation at high-z, especially beyond cosmic noon (z\gtrsim2.5), is controversial. With a combination of \emph{JWST} NIRCam/wide field slitless spectroscopy (WFSS) from FRESCO, CONGRESS and deep multi-band NIRCam/image data from JADES in the GOODS fields, we study the black hole to galaxy mass relation at z~1--4. After identifying 18 broad-line active galactic nuclei (BL AGNs) at 0.9 < z < 3.6 (with 8 at z>2.5) from the WFSS data, we measure their black hole masses based on broad near-infrared lines (Pa \alpha, Pa \beta, and He\,I \lambda10833\,\AA), and constrain their stellar masses (M_{*}) from AGN-galaxy image decomposition or SED decomposition. Taking account of the observational biases, the intrinsic scatter of the M_{\bullet}-M_{*} relation, and the errors in mass measurements, we find no significant difference in the M_{\bullet}/M_{*} ratio for 2.5 < z < 3.6 compared to that at lower redshifts (1 < z < 2.5), suggesting no evolution of the M_{\bullet} - M_{*} relation up to z~4.