http://arxiv.org/abs/2305.03408
It has been suggested that there is evidence for cosmological coupling of black holes (BHs) with an index of $k\approx 3$ and hence the BHs serve as the astrophysical source of the dark energy. The data sample however is limited for the redshifts $\leq 2.5$. Recently, the James Webb Space Telescope (JWST) has detected more than 180 high-redshift Active Galactic Nuclei (AGNs) and quasars. Among the JWST NIRSpec/NIRCam resolved AGNs, three are identified in early-type host galaxies with a redshift $z\sim 4.5-7$. Their $M_{\star}$ and $M_{\rm BH}$, however, are in tension with the prediction of the cosmological coupling of black holes with $k=3$ at a confidence level of $\sim 3\sigma$, which is not in support of the hypothesis that BHs serve as the origin of dark energy. The future observations of high-redshift AGNs by JWST will further test such a hypothesis by identifying more early-type host galaxies in the higher mass range.
L. Lei, L. Zu, G. Yuan, et. al.
Mon, 8 May 23
40/63
Comments: 9 pages, 3 figures, 1 table; Submitted to ApJL. Comments are welcome!