A fast-rotator post-starburst galaxy quenched by supermassive black-hole feedback at z=3

Understand

There is compelling evidence that the most massive galaxies in the Universe stopped forming stars due to the time-integrated feedback from their central super-massive black holes (SMBHs).

• However, the exact quenching mechanism is not yet understood, because local massive galaxies were quenched billions of years ago.
• We present JWST/NIRSpec integral-field spectroscopy observations of GS-10578, a massive, quiescent galaxy at redshift z=3.064.
• From the spectrum we infer that the galaxy has a stellar mass of $M_*=1.6\pm0.2 \times 10^{11}$ MSun and a dynamical mass $M_{\rm dyn}=2.0\pm0.5 \times 10^{11}$ MSun.