The TW Hya association expands at 103 km/s/kpc, implying a dynamical age of 9.7 Myr, while rigid-body rotation estimates differ by analysis method.
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Kinematic properties of the TW Hya association
The TW Hya association expands at 103 km/s/kpc, implying a dynamical age of 9.7 Myr, while rigid-body rotation estimates differ by analysis method.