The miniJPAS survey: AGN and host galaxy coevolution of X-ray-selected sources

Abstract

Studies indicate strong evidence of a scaling relation in the local Universe between the supermassive black hole mass (MBH) and the stellar mass of their host galaxies (M⋆). They even show similar histories across cosmic times of their differential terms: the star formation rate (SFR) and black hole accretion rate (BHAR). However, a clear picture of this coevolution is far from being understood. We selected an X-ray sample of active galactic nuclei (AGN) up to z = 2.5 in the miniJPAS footprint. Their X-ray to infrared spectral energy distributions (SEDs) have been modeled with the CIGALE code, constraining the emission to 68 bands, from which 54 are the narrow filters from the miniJPAS survey. For a final sample of 308 galaxies, we derived their physical properties, such as their M⋆, SFR, star formation history (SFH), and the luminosity produced by the accretion process of the central BH (LAGN). For a subsample of 113 sources, we also fit their optical spectra to obtain the gas velocity dispersion from the broad emission lines and estimated the MBH. We calculated the BHAR in physical units depending on two radiative efficiency regimes. We find that the Eddington ratios (λEdd) and its popular proxy (LX/M⋆) have a difference of 0.6 dex, on average, and a KS test indicates that they come from different distributions. Our sources exhibit a considerable scatter on the MBH − M⋆ scaling relation, which can explain the difference between λEdd and its proxy. We also modeled three evolution scenarios for each source to recover the integral properties at z = 0. Using the SFR and BHAR, we show a notable diminution in the scattering between MBH − M⋆. For the last scenario, we considered the SFH and a simple energy budget for the AGN accretion, and we retrieved a relation similar to the calibrations known for the local Universe. Our study covers ∼1 deg2 in the sky and is sensitive to biases in luminosity. Nevertheless, we show that, for bright sources, the link between the differential values (SFR and BHAR) and their decoupling based on an energy limit is the key that leads to the local MBH − M⋆ scaling relation. In the future, we plan to extend this methodology to a thousand degrees of the sky using JPAS with an X-ray selection from eROSITA, to obtain an unbiased distribution of BHAR and Eddington ratios.

The co-evolution of supermassive black holes and galaxies in luminous AGN over a wide range of redshift

“…Although, λ sBHAR is often used as a proxy of the Eddington ratio, it is important to acknowledge that the calculation of AGN bolometric luminosity and the inherent scatter in the relation between black hole mass, M BH , and M * , may introduce variations in λ sBHAR compared to the Eddington ratio, as indicated by previous studies (Lopez et al 2023;Mountrichas & Buat 2023). Nevertheless, our primary objective is to explore potential disparities in the distributions of λ sBHAR between type 1 and type 2 AGN.…”

Physical Properties of Hyperluminous, Dust-obscured Quasars at z ∼ 3: Multiwavelength Spectral Energy Distribution Analysis and Cold Gas Content Revealed by ALMA

“…At high redshift, it is hard to resolve the central AGN emission from the host galaxy. SED observations, modeling, and fitting are indispensable to investigate the physical properties of these high-redshift AGNs and their host galaxies (e.g., Merloni et al 2010;Bongiorno et al 2014;Suh et al 2019;López et al 2023).…”