Extended Data Fig. 1: Galaxy-integrated CO (4–3), CO (1–0) and C i (2–1) spectra of AzTEC-1.
From: The gravitationally unstable gas disk of a starburst galaxy 12 billion years ago
The CO (4–3) spectrum is extracted using an 0.8″-diameter aperture in the natural-weighted map cube. The C i (1–0) and C i (2–1) spectra are extracted from the peak positions in map cubes with 1.7″ × 1.1″ and 0.8″ × 0.7″ resolution, respectively. Yellow shaded regions show the velocity range v = −315 km s−1 to v = +315 km s−1, in which the velocity-integrated line fluxes are measured.
