Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Hajime Ezawa"'
Publikováno v:
Journal of Low Temperature Physics. 200:226-232
Fast photon detectors will be one of the key technologies to introduce new observing methods. Utilizing our recent development of low leakage SIS junctions with Nb/Al/AlOx/Al/Nb, we designed and fabricated an antenna-coupled SIS detector. The detecto
Autor:
Hajime Ezawa, Yasuhiro Murata, Hitoshi Kiuchi, Go Fujii, Makoto Hattori, Hiroshi Matsuo, Masahiro Ukibe, Mareki Honma
Publikováno v:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X.
High angular resolution astronomical observation in terahertz frequencies better than one milli-arcsecond will open a new field of terahertz astronomy. We propose terahertz intensity interferometry for aperture synthesis imaging. Fast photon detector
Publikováno v:
ASP Conference Series; 2022, Vol. 532, p579-582, 4p
Autor:
Takeshi Nakazato, Kanako Sugimoto, Akira Yoshino, Hajime Ezawa, Yohei Hayashi, George Kosugi, Jun Maekawa, Shigeru Takahashi, Ken'ichi Tatematsu
Publikováno v:
ASP Conference Series; 2022, Vol. 532, p397-400, 4p
Autor:
Tomoka Tosaki, Hajime Ezawa, Hiroshi Matsuo, Jason E. Austermann, Ryohei Kawabe, Akiko Kawamura, Kotaro Kohno, Shinya Komugi, Itziar Aretxaga, Monica Rubio, David H. Hughes, Norikazu Mizuno, Toshikazu Onishi, Tai Oshima, Tatsuya Takekoshi, Caroline Bot, Min S. Yun, Erik Muller, Grant W. Wilson, Yasuo Fukui, Tetsuhiro Minamidani, Kazuo Sorai
Publikováno v:
The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2018, 867 (2), pp.117. ⟨10.3847/1538-4357/aae48b⟩
The Astrophysical Journal, American Astronomical Society, 2018, 867 (2), pp.117. ⟨10.3847/1538-4357/aae48b⟩
We present a high-sensitivity ($1\sigma
Comment: 21 pages, 11 figures, accepted for publication by ApJ
Comment: 21 pages, 11 figures, accepted for publication by ApJ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6e97582b38d68a9e03318fbd9662694
https://hal.archives-ouvertes.fr/hal-03145471
https://hal.archives-ouvertes.fr/hal-03145471
Publikováno v:
Journal of Low Temperature Physics. 184:244-249
An Intensity interferometer with photon counting detector is a candidate to realize a THz interferometer for astronomical observations. We have demonstrated that synthesis imaging is possible even with intensity interferometers. An SIS junction (or S
Autor:
Hiroshi Matsuo, Hajime Ezawa
Publikováno v:
Journal of Low Temperature Physics. 184:718-723
For astronomical observation at terahertz frequencies, a variety of cryogenic detector technologies are being developed to achieve background-limited observation from space, where a noise equivalent power (NEP) of less than $$10^{-18}$$ W/Hz $$^{0.5}
Publikováno v:
2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
Photon counting detectors in terahertz frequencies are developed for future astronomical intensity interferometry. Superconducting tunnel junction detectors with extremely low leakage current can be used for fast photon counting, more than a GHz band
Autor:
Jamie Stevens, Yoichi Tamura, M. S. Yun, Andrew Humphrey, Jason E. Austermann, Tadayuki Kodama, Hajime Ezawa, G. W. Wilson, James Dunlop, Kotaro Kohno, Alfredo Montaña, David Sánchez-Arguelles, Sungeun Kim, Itziar Aretxaga, Ryohei Kawabe, M. Velázquez, Bunyo Hatsukade, Rob Ivison, Manolis Plionis, M. Zeballos, Kouichiro Nakanishi, Daniel Ferrusca, David H. Hughes
Publikováno v:
Zeballos, M, Aretxaga, I, Hughes, D H, Humphrey, A, Wilson, G W, Austermann, J, Dunlop, J S, Ezawa, H, Ferrusca, D, Hatsukade, B, Ivison, R J, Kawabe, R, Kim, S, Kodama, T, Kohno, K, Montaña, A, Nakanishi, K, Plionis, M, Śanchez-Argüelles, D, Stevens, J A, Tamura, Y, Velazquez, M & Yun, M S 2018, ' AzTEC 1.1 mm observations of high-z protocluster environments : SMG overdensities and misalignment between AGN jets and SMG distribution ', Monthly Notices of the Royal Astronomical Society, vol. 479, no. 4, pp. 4577-4632 . https://doi.org/10.1093/mnras/sty1714
We present observations at 1.1 mm towards 16 powerful radio galaxies and a radio-quiet quasar at 0.5 > z > 6.3 acquired with the AzTEC camera mounted at the James Clerk Maxwell Telescope and Atacama Submillimeter Telescope Experiment to study the spa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cbed73fbcc37820d2c84610e65c351e
Autor:
Yuichi Matsuda, Tai Oshima, Takuma Izumi, Hajime Ezawa, Hideki Umehata, Kotaro Kohno, Naomi Ota, Masamune Oguri, Tetsu Kitayama, Natsuki H. Hayatsu, Hiroshi Matsuo, Yuki Yamaguchi, Yoichi Tamura
We present the results of a blind millimeter line emitter search using ALMA Band 6 data with a single frequency tuning toward four gravitational lensing clusters (RXJ1347.5-1145, Abell S0592, MACS J0416.1-2403, and Abell 2744). We construct three-dim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7b1b630a35a94d4dd02f6b336044878