English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present the first ab initio cosmological simulations of a CR7-like objectwhich approximately reproduce the observed line widths and strengths. In ourmodel, CR7 is powered by a massive ($3.23 \times 10^7$ $M_\odot$) black hole(BH) the accretion rate of which varies between $\simeq$ 0.25 and $\simeq$ 0.9times the Eddington rate on timescales as short as 10$^3$ yr. Our model takesinto account multi-dimensional effects, X-ray feedback, secondary ionizationsand primordial chemistry. We estimate Ly-$\alpha$ line widths bypost-processing simulation output with Monte Carlo radiative transfer andcalculate emissivity contributions from radiative recombination and collisionalexcitation. We find the luminosities in the Lyman-$\alpha$ and He II 1640angstrom lines to be $5.0\times10^{44}$ and $2.4\times10^{43}$ erg s$^{-1}$,respectively, in agreement with the observed values of $>$ $8.3\times10^{43}$and $2.0\times10^{43}$ erg s$^{-1}$. We also find that the black hole heats thehalo and renders it unable to produce stars as required to keep the halo metalfree. These results demonstrate the viability of the BH hypothesis for CR7 in acosmological context. Assuming the BH mass and accretion rate that we find, weestimate the synchrotron luminosity of CR7 to be $P \simeq 10^{40} - 10^{41}$erg s$^{-1}$, which is sufficiently luminous to be observed in $\mu$Jyobservations and would discriminate this scenario from one where the luminosityis driven by Population III stars.

Ab Initio Cosmological Simulations of CR7 as an Active Black Hole