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Arxiv: Structure formation with primordial black holes to alleviate early star formation tension revealed by JWST Published: 4/19/2024 9:00:01 PM Updated: 4/19/2024 9:00:01 PM

Paper abstract: This Letter explores the potential role of primordial black holes (PBHs) toaddress cosmological tensions as the presence of more massive than expectedgalaxies at high redshifts, as indicated by recent James Webb Space Telescopeobservations. Motivated by inflation models that enhance the power at scalesbeyond the observable range that produce PBHs with Schechter-like massfunctions, we aim to explain the excess of high redshift galaxies via amodification of the \Lambda cold dark matter power spectrum that consists inadding (i) a blue spectral index n_b at k_{\text{piv}}=10/Mpc and (ii)Poisson and isocurvature contributions from massive PBHs that only make up0.5\% of the dark matter.We simulated these models using the SWIFT code andfind an increased abundance of high redshift galaxies in simulations thatinclude PBHs. We compared these models to estimates from James Webb SpaceTelescope observations.Unlike the \Lambda cold dark matter model, theinclusion of PBHs allowed us to reproduce the the observations with reasonablevalues for the star formation efficiency. Furthermore, the power spectra weadopted potentially produce PBHs that can serve as seeds for supermassive blackholes with masses 7.57 \times 10^4 M_{\odot}.