Extremely strong carbon monoxide emission from the Cloverleaf quasar at a redshift of 2.5

摘要: GALAXIES at high redshift are very faint and difficult to study optical near-infrared wavelengths, but detection of far-infrared emission1 molecular gas2,3 in a galaxy z≈2.3 has suggested that their early evolution may be investigated by these means instead. The host galaxies quasars promising candi-dates for observations, particularly as might triggered interactions mergers between galaxies4,5 which result dust- gas-rich systems. Cloverleaf, gravitation-ally lensed quasar, far-infrared/submillimetre emission indicat-ing substantial dust content6, therefore potentially large amount gas. Here we report the carbon monoxide from interpret indicating mass gas is comparable total dynamical galaxy, consistent with baryonic content present-day luminous galaxy. This suggests that, although some processing through stars taken place Cloverleaf lookback time 85% current age Universe, much future stellar yet formed.