Speaker
Description
Interactions between a galaxy and its environment play a crucial role in regulating star formation and black hole growth, yet the relative importance of various feedback mechanisms remain poorly understood at high redshifts. Here, we present an in-depth analysis of a giant barred-spiral galaxy, GWS-CC50 ($M_\star \sim 10^{11}\,{\rm M}_\odot$), at redshift $z=2.9$ in a protocluster core exhibiting not only ongoing star formation, but also clear signatures of AGN activity and an extended Ly$\alpha$ emission halo observed with Keck/KCWI. The central type 1 AGN (${\rm FWHM_{H\alpha} \sim 6500\, km\,s^{-1}}$, $M_{\rm BH} \sim 10^8\,{\rm M}_\odot$) further reveals narrow coronal emission lines as well as outflow signatures in both the near-IR forbidden emission lines and far-UV absorption lines. This object, with its myriad potential feedback sources, presents a perfect laboratory for studying feedback mechanisms in the early Universe. Using multiwavelength photometry and spatially-resolved spectroscopy spanning X-rays to far-IR, we explore the interplay between the galaxy and its surroundings. By comparing CC50 to other massive spirals at $z \sim 3$ identified with JWST and/or ALMA, we investigate the influence of AGN feedback from nuclear to galactic scales within massive galaxies during the peak era of star formation and AGN activity in cosmic history.