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An 800-million-solar-mass black hole in a significantly neutral Universe at a re

Started by Unbeliever, January 26, 2019, 12:44:53 pm

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Unbeliever

QuoteAbstract


Quasars are the most luminous non-transient objects known and as a result they enable studies of the Universe at the earliest cosmic epochs. Despite extensive efforts, however, the quasar ULAS J1120 + 0641 at redshift z = 7.09 has remained the only one known at z > 7 for more than half a decade1. Here we report observations of the quasar ULAS J134208.10 + 092838.61 (hereafter J1342 + 0928) at redshift z = 7.54. This quasar has a bolometric luminosity of 4 ¡Á 1013 times the luminosity of the Sun and a black-hole mass of 8 ¡Á 108 solar masses. The existence of this supermassive black hole when the Universe was only 690 million years old¡ªjust five per cent of its current age¡ªreinforces models of early black-hole growth that allow black holes with initial masses of more than about 104 solar masses2,3 or episodic hyper-Eddington accretion4,5. We see strong evidence of absorption of the spectrum of the quasar redwards of the Lyman ¦Á emission line (the Gunn¨CPeterson damping wing), as would be expected if a significant amount (more than 10 per cent) of the hydrogen in the intergalactic medium surrounding J1342 + 0928 is neutral. We derive such a significant fraction of neutral hydrogen, although the exact fraction depends on the modelling. However, even in our most conservative analysis we find a fraction of more than 0.33 (0.11) at 68 per cent (95 per cent) probability, indicating that we are probing well within the reionization epoch of the Universe.



https://www.nature.com/articles/nature25180

https://phys.org/news/2017-12-scientists-supermassive-black-hole-infant.html
"Some say God is living there [in space]. I was looking around very attentively, but I did not see anyone there. I did not detect either angels or gods....I don't believe in God. I believe in man - his strength, his possibilities, his reason."
Gherman Titov, Soviet cosmonaut, in The Seattle Daily Ti