Freeze–thaw cycles and snow impact at arid permafrost region in Chajnantor Volcano, Atacama, northern Chile

Autor: Gabriela Mena, Kenji Yoshikawa, Norbert Schorghofer, César Pastén, Felipe Agustin Ochoa, Yuzuru Yoshii, Mamoru Doi, Takeshi Miyata, Hidenori Takahashi, Gino Casassa, Toshio Sone

Publikováno v: Arctic, Antarctic, and Alpine Research, Vol 53, Iss 1, Pp 60-66 (2021)

Permafrost occurs in the high Atacama Desert, and its thermal state was characterized at a study site 5,075 m a.s.l., at the lower regional altitude boundary for permafrost. The permafrost body is about 5 m thick and located in the hydrothermal alter

Externí odkaz: https://doaj.org/article/7821f2d259eb4f5195f5b60a12e600f9

High-spatial resolution long-mid-infrared observations of massive star-forming regions: Local star formation sequence

Autor: Yuzuru Yoshii, Yutaro Kitagawa, Masahiro Konishi, Takuya Yamashita, Kentaro Motohara, Mizuho Uchiyama, S. Koshida, Toshihiko Tanabe, Takuya Fujiyoshi, Takafumi Kamizuka, Shigeyuki Sako, Tomohiko Nakamura, Kentaro Asano, Ken Tateuchi, Mizuki Yoneda, Takashi Miyata

Publikováno v: Publications of the Astronomical Society of Japan. 73:1638-1655

The formation of massive stars in dense and cold molecular clouds is a fundamental problem in star formation. In this work, we studied three compact massive star-forming regions, M8E, RAFGL 6366S, and IRAS 18317−0513, to investigate the environment

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::92161883ea3d3ade1da1a0bd55f80375
https://doi.org/10.1093/pasj/psab101

The University of Tokyo Atacama Observatory 6.5m telescope : project status 2022

Autor: Takashi Miyata, Yuzuru Yoshii, Mamoru Doi, Kotaro Kohno, Masuo Tanaka, Kentaro Motohara, Takeo Minezaki, Shigeyuki Sako, Tomoki Morokuma, Toshihiko Tanabe, Bunyo Hatsukade, Masahiro Konishi, Hidenori Takahashi, Takafumi Kamizuka, Fumi Egusa, Hiroaki Sameshima, Kentaro Asano, Atsushi Nishimura, Shuhei Koyama, Natsuko Kato, Mizuki Numata, Tsutomu Aoki, Leonardo Bronfman, Maria T. Ruiz, Mario Hamuy, Rene Mendez, Guido Garay, Andres Escala

Publikováno v: Ground-based and Airborne Telescopes IX.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c4a9affab26ff3a00e9362f4587c0d7c
https://doi.org/10.1117/12.2628146

EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-Poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension

Autor: Akinori Matsumoto, Masami Ouchi, Kimihiko Nakajima, Masahiro Kawasaki, Kai Murai, Kentaro Motohara, Yuichi Harikane, Yoshiaki Ono, Kosuke Kushibiki, Shuhei Koyama, Shohei Aoyama, Masahiro Konishi, Hidenori Takahashi, Yuki Isobe, Hiroya Umeda, Yuma Sugahara, Masato Onodera, Kentaro Nagamine, Haruka Kusakabe, Yutaka Hirai, Takashi J. Moriya, Takatoshi Shibuya, Yutaka Komiyama, Keita Fukushima, Seiji Fujimoto, Takashi Hattori, Kohei Hayashi, Akio K. Inoue, Shotaro Kikuchihara, Takashi Kojima, Yusei Koyama, Chien-Hsiu Lee, Ken Mawatari, Takashi Miyata, Tohru Nagao, Shinobu Ozaki, Michael Rauch, Tomoki Saito, Akihiro Suzuki, Tsutomu T. Takeuchi, Masayuki Umemura, Yi Xu, Kiyoto Yabe, Yechi Zhang, Yuzuru Yoshii

Publikováno v: Matsumoto, A, Ouchi, M, Nakajima, K, Kawasaki, M, Murai, K, Motohara, K, Harikane, Y, Ono, Y, Kushibiki, K, Koyama, S, Aoyama, S, Konishi, M, Takahashi, H, Isobe, Y, Umeda, H, Sugahara, Y, Onodera, M, Nagamine, K, Kusakabe, H, Hirai, Y, Moriya, T J, Shibuya, T, Komiyama, Y, Fukushima, K, Fujimoto, S, Hattori, T, Hayashi, K, Inoue, A K, Kikuchihara, S, Kojima, T, Koyama, Y, Lee, C H, Mawatari, K, Miyata, T, Nagao, T, Ozaki, S, Rauch, M, Saito, T, Suzuki, A, Takeuchi, T T, Umemura, M, Xu, Y, Yabe, K, Zhang, Y & Yoshii, Y 2022, ' EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-poor Galaxies : A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension ', Astrophysical Journal, vol. 941, no. 2, 167 . https://doi.org/10.3847/1538-4357/ac9ea1

The primordial He abundance $Y_\mathrm{P}$ is a powerful probe of cosmology. Currently, $Y_\mathrm{P}$ is best determined by observations of metal-poor galaxies, while there are only a few known local extremely metal-poor ($
Comment: 22 pages, 9

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88e261c0ef080063285ea705fcd335de
http://arxiv.org/abs/2203.09617

A domeless, mobile 2-meter telescope

Autor: Jeffrey S. Kingsley, Yuzuru Yoshii, Peter A. Strittmatter, Kerry L. Gonzales, Bradley I. Kingsley, Takeo Minezaki, Buell T. Jannuzi, Thomas Connors

Publikováno v: Ground-based and Airborne Telescopes VIII.

There are many astronomical, interferometric and space situational awareness applications for single and multiple 2-meter aperture optical and infrared mobile telescopes that are low cost, can be easily transported and quickly deployed at a variety o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4c5cb6cea5484aea8379e49b0df67d06
https://doi.org/10.1117/12.2563217