The Pristine survey -- XVII. The C-19 stream is dynamically hot and more extended than previously thought

Zhen Yuan, Nicolas F. Martin, Rodrigo A. Ibata +22

The C-19 stream is the most metal poor stellar system ever discovered, with a mean metallicity $[Fe/H]=-3.38\pm 0.06$. Its low metallicity dispersion (${\sigma }_{[Fe/H]}$ $<$ 0.18 at…