> “How they grew to such mass so early after the Big Bang is a profound puzzle for physics,” the authors say in their paper.<p>Anyone have any details for this tidbit? Would be interested to know more.
"Discovery of the most ultra-luminous QSO using Gaia, SkyMapper and WISE"
Publications of the Astronomical Society of Australia (PASA)<p>free PDF version: <a href="https://arxiv.org/pdf/1805.04317.pdf" rel="nofollow">https://arxiv.org/pdf/1805.04317.pdf</a>