Image: International Gemini Observatory / NOIRLab / NSF / AURA / P. Marenfeld
An international team of astronomers from USA, Germany, China and Chile reported the discovery of the largest quasar, called “Phonewhen” (Pōniuā’ena), which in the Hawaiian language means “invisible rotating the source of creation, surrounded by lights”. The object is located at a distance of about 30 billion light-years, which corresponds to the age of the Universe in 710 million years. Preprint of an article that will be published in the journal Astrophysical Journal Letters available on the website arxiv.
The light from the quasar J1007+2115 flew 13 billion years, but due to the accelerated expansion of the Universe its redshift is z=7,515 that corresponds to the actual distance, equal to 29.3 billion light years. Astronomers see the object as it was in the era of reionization when there were first stars, their light ionized the hydrogen atoms. In the “Phonewhen” contains a supermassive black hole, whose mass reaches 1.5 billion solar masses, making quasar the largest object in the early Universe.
According to Jeanie young (Jinyi Yang), lead author of the work from the University of Arizona, is the earliest object of such monstrous proportions of the famous scientists. Its existence presents a challenge for theoretical models of the formation of supermassive black holes, according to which J1007+2115 just don’t have time to grow in 710 million years, if it originally arose as a result of the collapse of a star. Instead, the astronomers believe, in a hundred million years after the Big Bang there was already a black hole with a mass of 10 million Suns, which were formed by direct gravitational collapse of clouds of cold hydrogen gas.
At the moment, “Peiwen” is the second oldest quasar found to date. In 2018 was discovered quasar J1342+0928, which is two million years older than J1007+2115, but two times less massive.
Video, photo All from Russia.