Rotating Nuclear Rings and Extreme Starbursts in Ultraluminous Galaxies
Rotating Nuclear Rings and Extreme Starbursts in Ultraluminous Galaxies
New CO interferometer data show that the molecular gas in infrared ultraluminous galaxies is in rotating nuclear disks or rings. The CO maps yield disk radii, kinematic major axes, rotation speeds, enclosed dynamical masses, and gas masses. The CO brightness temperatures, the double-peaked CO line profiles, the limits on thermal …