Rotationally-supported disks around Class I sources in Taurus: disk formation constraints

Understand

(Abridged) Disks are observed around pre-main sequence stars, but how and when they form is still heavily debated.

• While disks around young stellar objects have been identified through thermal dust emission, spatially and spectrally resolved molecular line observations are needed to determine their nature.
• We present subarcsecond observations of dust and gas toward four Class I low-mass young stellar objects in Taurus.
• The 13CO and C18O J=2-1 transitions at 220 GHz were observed with the Plateau de Bure Interferometer at a spatial resolution of ~0.8'' and analyzed using uv-space position velocity diagrams to determine the nature of their observed velocity radient.