Large Population of ALMA Galaxies at z > 6 with Very High [O iii] 88 μm to [C ii] 158 μm Flux Ratios: Evidence of Extremely High Ionization Parameter or PDR Deficit?
Yuichi Harikane(The University of Tokyo), L. Vallini(Leiden University), Eiichi Egami(University of Arizona), Yoichi Tamura(Nagoya University), S. Gallerani(Scuola Normale Superiore), Kana Moriwaki(The University of Tokyo), Yuma Sugahara(Waseda University), Tohru Nagao(Ehime University), Ken-ichi Tadaki(National Astronomical Observatory of Japan), Masami Ouchi(Kavli Institute for the Physics and Mathematics of the Universe), Hiroshi Matsuo(The Graduate University for Advanced Studies, SOKENDAI), Yuichi Matsuda(The Graduate University for Advanced Studies, SOKENDAI), Yoshiaki Ono(The University of Tokyo), Takuya Hashimoto(Université Claude Bernard Lyon 1), Yoshiki Matsuoka(Ehime University), Andrea Ferrara(Scuola Normale Superiore), Takashi Kojima(National Astronomical Observatory of Japan), Akio Inoue(Osaka Sangyo University), Kotaro Kohno(The University of Tokyo), Tom J. L. C. Bakx(National Astronomical Observatory of Japan), Seiji Fujimoto(Waseda University), Takatoshi Shibuya(Kitami Institute of Technology), A. Pallottini(Scuola Normale Superiore)
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