Zobrazeno 1 - 10
of 364
pro vyhledávání: '"Masami Ouchi"'
Autor:
Mingyu Li, Haibin Zhang, Zheng Cai, Yongming Liang, Nobunari Kashikawa, Ke Ma, Xiaohui Fan, J. Xavier Prochaska, Bjorn H. C. Emonts, Xin Wang, Yunjing Wu, Shiwu Zhang, Qiong Li, Sean D. Johnson, Minghao Yue, Fabrizio Arrigoni Battaia, Sebastiano Cantalupo, Joseph F. Hennawi, Satoshi Kikuta, Yuanhang Ning, Masami Ouchi, Rhythm Shimakawa, Ben Wang, Weichen Wang, Zheng Zheng, Zhen-Ya Zheng
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 2, p 27 (2024)
Circumgalactic Ly α nebulae are gaseous halos around galaxies exhibiting luminous extended Ly α emission. This work investigates Ly α nebulae from deep imaging of ∼12 deg ^2 sky, targeted by the MAMMOTH-Subaru survey. Utilizing the wide-field ca
Externí odkaz:
https://doaj.org/article/41a80654a97e4fac8485a96b27d02ec1
Autor:
Yi Xu, Masami Ouchi, Hidenobu Yajima, Hajime Fukushima, Yuichi Harikane, Yuki Isobe, Kimihiko Nakajima, Minami Nakane, Yoshiaki Ono, Hiroya Umeda, Hiroto Yanagisawa, Yechi Zhang
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 142 (2024)
We investigate the dynamics of GN-z11, a luminous galaxy at z = 10.60, carefully analyzing the public deep integral field spectroscopy (IFS) data taken with the JWST NIRSpec integral field unit. While the observations of the IFS data originally targe
Externí odkaz:
https://doaj.org/article/16f824e7918543f7b9c0c26cb65a7091
Autor:
Minami Nakane, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Nozomu Tominaga, Koh Takahashi, Daichi Kashino, Hiroto Yanagisawa, Kuria Watanabe, Ken’ichi Nomoto, Yuki Isobe, Moka Nishigaki, Miho N. Ishigaki, Yoshiaki Ono, Yui Takeda
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 122 (2024)
We present an [O/Fe] ratio of a luminous galaxy GN-z11 at z = 10.60 derived with the deep public JWST/NIRSpec data. We fit the medium-resolution grating (G140M, G235M, and G395M) data with the model spectra consisting of BPASS-stellar and Cloudy -neb
Externí odkaz:
https://doaj.org/article/f94976badb7141a49b52bc802fe65199
Autor:
Hiroto Yanagisawa, Masami Ouchi, Kuria Watanabe, Akinori Matsumoto, Kimihiko Nakajima, Hidenobu Yajima, Kentaro Nagamine, Koh Takahashi, Minami Nakane, Nozomu Tominaga, Hiroya Umeda, Hajime Fukushima, Yuichi Harikane, Yuki Isobe, Yoshiaki Ono, Yi Xu, Yechi Zhang
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 266 (2024)
We present He i /H β flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ∼ 6 mostly with the spectroscopic coverage from H
Externí odkaz:
https://doaj.org/article/eb09a0df57fb453e846492ddc1992042
Autor:
Hiroto Yanagisawa, Masami Ouchi, Kimihiko Nakajima, Hidenobu Yajima, Hiroya Umeda, Shunsuke Baba, Takao Nakagawa, Minami Nakane, Akinori Matsumoto, Yoshiaki Ono, Yuichi Harikane, Yuki Isobe, Yi Xu, Yechi Zhang
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 180 (2024)
We investigate the physical origins of the Balmer decrement anomalies in GS-NDG-9422 and RXCJ2248-ID galaxies at z ∼ 6 whose H α /H β values are significantly smaller than 2.7, the latter of which also shows anomalous H γ /H β and H δ /H β va
Externí odkaz:
https://doaj.org/article/d3273fd65e414c8c89aa8548616e47ae
Autor:
Hiroya Umeda, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Yoshiaki Ono, Yi Xu, Yuki Isobe, Yechi Zhang
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 124 (2024)
We present volume-averaged neutral hydrogen fractions x _H I and ionized bubble radii R _b measured with Ly α damping wing absorption of galaxies at the epoch of reionization. We combine JWST/NIRSpec spectra taken by the CEERS, GO-1433, DDT-2750, an
Externí odkaz:
https://doaj.org/article/a759d0fa4a5549d585158e8e171cbddc
Autor:
Yechi Zhang, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Yuki Isobe, Yi Xu, Yoshiaki Ono, Hiroya Umeda
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 19 (2024)
We present statistics of z ∼ 6–9 galaxy outflows indicated by spatially extended gas emission and broad lines. With a total of 61 spectroscopically confirmed galaxies at z ∼ 6–9 in the JWST CEERS, GLASS, and ERO data, we find four galaxies wi
Externí odkaz:
https://doaj.org/article/8b241cef8e994541a21bef274d816241
Autor:
Minami Nakane, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Yoshiaki Ono, Hiroya Umeda, Yuki Isobe, Yechi Zhang, Yi Xu
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 28 (2024)
We present the evolution of Ly α emission derived from 53 galaxies at z = 6.6–13.2, which have been identified by multiple JWST/NIRSpec spectroscopy programs of Early Release Science, General Observer, Director's Discretionary Time, and Guaranteed
Externí odkaz:
https://doaj.org/article/644d57ab5e6649a19efb871609d95808
Autor:
Shun Hatano, Masami Ouchi, Hiroya Umeda, Kimihiko Nakajima, Toshihiro Kawaguchi, Yuki Isobe, Shohei Aoyama, Kuria Watanabe, Yuichi Harikane, Haruka Kusakabe, Akinori Matsumoto, Takashi J. Moriya, Moka Nishigaki, Yoshiaki Ono, Masato Onodera, Yuma Sugahara, Akihiro Suzuki, Yi Xu, Yechi Zhang
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 170 (2024)
We present ionizing spectra estimated at 13.6–100 eV for 10 dwarf galaxies with strong high-ionization lines of He ii λ 4686 and [Ne v ] λ 3426 ([Ne iv ] λ 2424) at z = 0 ( z = 8) that are identified in our Keck/LRIS spectroscopy and the literat
Externí odkaz:
https://doaj.org/article/4802614fdb8d4f74856dc35a64b04595
Autor:
Seiji Fujimoto, Masami Ouchi, Kimihiko Nakajima, Yuichi Harikane, Yuki Isobe, Gabriel Brammer, Masamune Oguri, Clara Giménez-Arteaga, Kasper E. Heintz, Vasily Kokorev, Franz E. Bauer, Andrea Ferrara, Takashi Kojima, Claudia del P. Lagos, Sommovigo Laura, Daniel Schaerer, Kazuhiro Shimasaku, Bunyo Hatsukade, Kotaro Kohno, Fengwu Sun, Francesco Valentino, Darach Watson, Yoshinobu Fudamoto, Akio K. Inoue, Jorge González-López, Anton M. Koekemoer, Kirsten Knudsen, Minju M. Lee, Georgios E. Magdis, Johan Richard, Victoria B. Strait, Yuma Sugahara, Yoichi Tamura, Sune Toft, Hideki Umehata, Gregory Walth
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 2, p 146 (2024)
We present Atacama Large Millimeter/submillimeter Array (ALMA) deep spectroscopy for a lensed galaxy at z _spec = 8.496 with $\mathrm{log}({M}_{\mathrm{star}}/{M}_{\odot })\sim 7.8$ whose optical nebular lines and stellar continuum are detected by JW
Externí odkaz:
https://doaj.org/article/c50c46df12c741c8b86cdd2c26bea486