Optical Imaging Polarimetry of Comet 21P/Giacobini–Zinner during Its 2018 Apparition by Yoshiharu Shinnaka, Hideyo Kawakita, Hitomi Kobayashi, Reiko Furusho, Jun-ichi Watanabe

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Direct Simulation Monte Carlo Modeling of Ammonia in Comet C/2014 Q2 (Lovejoy) by Hideyo Kawakita, Neil Dello Russo, Ronald J. Vervack Jr., Michael A. DiSanti, Boncho P. Bonev, Hitomi Kobayashi, Daniel C. Boice, Yoshiharu Shinnaka

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[N i] 10400/10410 Å Lines as Possible Disk Wind Tracers in a Young Intermediate-mass Star by Haruki Katoh, Chikako Yasui, Yuji Ikeda, Naoto Kobayashi, Noriyuki Matsunaga, Sohei Kondo, Hiroaki Sameshima, Satoshi Hamano, Misaki Mizumoto, Hideyo Kawakita, Kei Fukue, Shogo Otsubo, Keiichi Takenaka

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Shock Excitation in Narrow-line Regions Powered by AGN Outflows by Misaki Mizumoto, Hiroaki Sameshima, Naoto Kobayashi, Noriyuki Matsunaga, Sohei Kondo, Satoshi Hamano, Chikako Yasui, Kei Fukue, Akira Arai, Hideyo Kawakita, Shogo Otsubo, Giuseppe Bono, Ivo Saviane

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Coma Abundances of Volatiles at Small Heliocentric Distances: Compositional Measurements of Long-period Comet C/2020 S3 (Erasmus) by Chemeda Ejeta, Erika Gibb, Nathan Roth, Michael A. DiSanti, Neil Dello Russo, Mohammad Saki, Adam J. McKay, Hideyo Kawakita, Younas Khan, Boncho P. Bonev, Ronald J. Vervack Jr., Michael R. Combi

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Metallicities of Classical Cepheids in the Inner Galactic Disk by Noriyuki Matsunaga, Daisuke Taniguchi, Scarlet S. Elgueta, Takuji Tsujimoto, Junichi Baba, Andrew McWilliam, Shogo Otsubo, Yuki Sarugaku, Tomomi Takeuchi, Haruki Katoh, Satoshi Hamano, Yuji Ikeda, Hideyo Kawakita, Charlie Hull, Rogelio Albarracín, Giuseppe Bono, Valentina D’Orazi

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Comprehensive Study of the Chemical Composition and Spatial Outgassing Behavior of Hyperactive Comet 46P/Wirtanen Using Near-IR Spectroscopy during its Historic 2018 Apparition by Younas Khan, Erika L. Gibb, Nathan X. Roth, Michael A. DiSanti, Neil Dello Russo, Boncho P. Bonev, Chemeda T. Ejeta, Mohammad Saki, Ronald J. Vervack Jr., Adam J. McKay, Hideyo Kawakita, Michael R. Combi, Danna Qasim, Yinsi Shou

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A High-resolution Non-detection of Escaping Helium in the Ultrahot Neptune LTT 9779b: Evidence for Weakened Evaporation by Shreyas Vissapragada, Patrick McCreery, Leonardo A. Dos Santos, Néstor Espinoza, Andrew McWilliam, Noriyuki Matsunaga, Jéa Adams Redai, Patrick Behr, Kevin France, Satoshi Hamano, Charlie Hull, Yuji Ikeda, Haruki Katoh, Hideyo Kawakita, Mercedes López-Morales, Kevin N. Ortiz Ceballos, Shogo Otsubo, Yuki Sarugaku, Tomomi Takeuchi

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The Return of the Rosetta Target: Keck Near-infrared Observations of Comet 67P/Churyumov–Gerasimenko in 2021 by Boncho P. Bonev, Neil Dello Russo, Hideyo Kawakita, Ronald J. Vervack Jr., Michael A. DiSanti, Yoshiharu Shinnaka, Takafumi Ootsubo, Erika L. Gibb, Michael R. Combi, Kathrin Altwegg, Nicolas Biver, Jacques Crovisier, Gregory Doppmann, Geronimo L. Villanueva, Younas Khan, Chemeda T. Ejeta, Mohammad Saki, Adam J. McKay, Anita L. Cochran, Emmanuel Jehin, Nathan X. Roth, Martin A. Cordiner, Yinsi Shou

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