The KMOS3D survey: design, first results, and the evolution of galaxy kinematics from 0.7 ≤ z ≤ 2.7

摘要: We present the KMOS3D survey, a new integral field survey of over 600 galaxies at 0.7 1, implying that star-forming main sequence is primarily composed rotating both redshift regimes. When considering additional stricter criteria, Hα kinematic maps indicate least ~70% resolved are disk-like systems. Our high-quality KMOS data confirm elevated velocity dispersions reported in previous spectroscopy studies z 0.7. For rotation-dominated disks, average intrinsic dispersion decreases by factor two from 50 km s–1at ~ 2.3 to 25 0.9. Combined with existing results spanning 0-3, we show disk follow an evolution consistent dependence on gas fractions predicted marginally stable theory.