High-Redshift Galaxy Candidates at z > 6 as Revealed by JWST Observations of MACS0647

We present a catalog of 57 high-redshift $z>6$ galaxy candidates, including 14 spectroscopic confirmations ($z = 6.10$ -- 9.25), 2 Little Red Dots ($z = 4.77$, 5.81), and 2 interlopers ($z = 3.23$, 3.72), based on \ NIRCam imaging (7 filters), NIRSpec spectroscopy (PRISM and G395H), and archival \ imaging (17 filters) of the strong lensing galaxy cluster MACS0647. Our highest redshift confirmation ($z = 9.25$) is an Extremely Blue Galaxy (presented in~{Yanagisawa2024}), and here we identify a spectral turnover likely due to damped Lyman-$α$. We identify an overdensity of galaxies with spectroscopic redshifts $z = 6.1$, confirming the z ~ 6 overdensity identified in \ images. In one of these galaxies, our high-resolution G395H spectroscopy reveals two spatially resolved components with a velocity difference of ~90 km/s; if these components are gravitationally bound, this would imply a dynamical mass on the order of ~ 10⁸\ M_ given their projected separation. We present spectral line fluxes, widths, and derived physical properties, including stellar masses (10⁸ - 10⁹ \ M_) and metallicities (10% - 40% \ Z_) for our spectroscopic sample. We note half of our NIRSpec data was obtained with standard 3-slitlet nods and half was obtained with single slitlets yielding similar results, demonstrating the power to observe more sources on a densely packed NIRSpec MSA.