Is NGC 5824 the Core of the Progenitor of the Cetus Stream?

Understand

A large number of new members ($\sim$150) of the Cetus Stream (CS) were identified from their clustering features in dynamical space using 6D kinematic data by combining LAMOST DR5 and Gaia DR2 surveys.

• They map a diffuse structure that extends over at least 100 degrees in the northern and southern Galactic hemispheres, at heliocentric distances between 20 to 50 kpc.
• Taking advantage of this expanded dataset, we model the stream with a suite of tailored N-body simulations.
• Our findings exclude the possibility that the NGC 5824 globular cluster is the core of the progenitor of the stream, as postulated by previous studies.