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Bakx, Tomonari Michiyama, Wataru Osone, Yoichi Tamura, Yoshinobu Fudamoto, Yuma Sugahara, Yurina Nakazato","submitted_at":"2024-08-19T12:33:59Z","abstract_excerpt":"We report the highest-redshift detection of [O I] 63 $\\mu$m from a luminous quasar, J2054-0005, at $z=6.04$ based on the Atacama Large Millimeter/sub-millimeter Array Band 9 observations. The [O I] 63 $\\mu$m line luminosity is $(4.5\\pm1.5) \\times 10^{9}~L_{\\rm \\odot}$, corresponding to the [O I] 63 $\\mu$m-to-far-infrared luminosity ratio of $\\approx 6.7\\times10^{-4}$, which is consistent with the value obtained in the local universe. Remarkably, [O I] 63 $\\mu$m is as bright as [C II] 158 $\\mu$m, resulting in the [O I]-to-[C II] line luminosity ratio of $1.3\\pm0.5$. 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Inoue, Carl Ferkinhoff, Darko Donevski, Dragan Salak, Fabian Walter, Hidenobu Yajima, Hiroshi Matsuo, Ken Mawatari, Koki Wakasugi, Matus Rybak, Mitsutaka Usui, Naoki Yoshida, Nario Kuno, Nozomi Ishii, Romain A. Meyer, Seiji Fujimoto, Takuma Izumi, Takuya Hashimoto, Tohru Nagao, Tom J. L. C. Bakx, Tomonari Michiyama, Wataru Osone, Yoichi Tamura, Yoshinobu Fudamoto, Yuma Sugahara, Yurina Nakazato","submitted_at":"2024-08-19T12:33:59Z","abstract_excerpt":"We report the highest-redshift detection of [O I] 63 $\\mu$m from a luminous quasar, J2054-0005, at $z=6.04$ based on the Atacama Large Millimeter/sub-millimeter Array Band 9 observations. The [O I] 63 $\\mu$m line luminosity is $(4.5\\pm1.5) \\times 10^{9}~L_{\\rm \\odot}$, corresponding to the [O I] 63 $\\mu$m-to-far-infrared luminosity ratio of $\\approx 6.7\\times10^{-4}$, which is consistent with the value obtained in the local universe. 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