Zobrazeno 1 - 10
of 34 300
pro vyhledávání: '"Umeda, A."'
Autor:
Nakajima, Kimihiko, Ouchi, Masami, Isobe, Yuki, Xu, Yi, Ozaki, Shinobu, Nagao, Tohru, Inoue, Akio K., Rauch, Michael, Kusakabe, Haruka, Onodera, Masato, Nishigaki, Moka, Ono, Yoshiaki, Sugahara, Yuma, Hattori, Takashi, Hirai, Yutaka, Hashimoto, Takuya, Kim, Ji Hoon, Moriya, Takashi J., Yanagisawa, Hiroto, Aoyama, Shohei, Fujimoto, Seiji, Fukushima, Hajime, Fukushima, Keita, Harikane, Yuichi, Hatano, Shun, Hayashi, Kohei, Ishigaki, Tsuyoshi, Kawasaki, Masahiro, Kojima, Takashi, Komiyama, Yutaka, Koyama, Shuhei, Koyama, Yusei, Lee, Chien-Hsiu, Matsumoto, Akinori, Mawatari, Ken, Motohara, Kentaro, Murai, Kai, Nagamine, Kentaro, Nakane, Minami, Saito, Tomoki, Sasaki, Rin, Shibuya, Takatoshi, Suzuki, Akihiro, Takeuchi, Tsutomu T., Umeda, Hiroya, Umemura, Masayuki, Watanabe, Kuria, Yabe, Kiyoto, Yajima, Hidenobu, Zhang, Yechi
Using the Subaru/FOCAS IFU capability, we examine the spatially resolved relationships between gas-phase metallicity, stellar mass, and star-formation rate surface densities (Sigma_* and Sigma_SFR, respectively) in extremely metal-poor galaxies (EMPG
Externí odkaz:
http://arxiv.org/abs/2412.04541
Autor:
Yanagisawa, Hiroto, Ouchi, Masami, Nakajima, Kimihiko, Harikane, Yuichi, Fujimoto, Seiji, Ono, Yoshiaki, Umeda, Hiroya, Nakane, Minami, Yajima, Hidenobu, Fukushima, Hajime, Xu, Yi
We investigate UV continuum slopes $\beta$ of 974 galaxies at $z=4-14$ using archival JWST/NIRSpec PRISM spectra obtained from major JWST GTO, ERS, and GO programs, including JADES, CEERS, and UNCOVER. Among these galaxies, we identify a remarkable g
Externí odkaz:
http://arxiv.org/abs/2411.19893
Autor:
Umeda, Kenichi, Kodera, Noriyuki
Amplitude-modulation atomic force microscopy (AM-AFM) is a powerful tool for observing nanoscale surface structures with minimal disruption. As we discussed previously, AM-AFM maximizes detection sensitivity when exciting the cantilever at the resona
Externí odkaz:
http://arxiv.org/abs/2411.17085
Autor:
Umeda, Kenichi, Kodera, Noriyuki
Amplitude-modulation atomic force microscopy enables observation of fragile molecules at the nanometer scale. To shorten measurement times and capture dynamic molecules, increasing the frame rate is essential. Traditionally, maximum frame rates were
Externí odkaz:
http://arxiv.org/abs/2411.16317
Autor:
Umeda, Hiroya, Ouchi, Masami, Kikuta, Satoshi, Harikane, Yuichi, Ono, Yoshiaki, Shibuya, Takatoshi, Inoue, Akio K., Shimasaku, Kazuhiro, Liang, Yongming, Matsumoto, Akinori, Saito, Shun, Kusakabe, Haruka, Kageura, Yuta, Nakane, Minami
We present the luminosity functions (LFs) and angular correlation functions (ACFs) derived from 18,960 Ly$\alpha$ emitters (LAEs) at $z=2.2-7.3$ over a wide survey area of $\lesssim24 {\rm deg^2}$ that are identified in the narrowband data of the Hyp
Externí odkaz:
http://arxiv.org/abs/2411.15495
Autor:
Zhu, Chenghao, Harikane, Yuichi, Ouchi, Masami, Ono, Yoshiaki, Onodera, Masato, Tang, Shenli, Isobe, Yuki, Matsuoka, Yoshiki, Kawaguchi, Toshihiro, Umeda, Hiroya, Nakajima, Kimihiko, Liang, Yongming, Xu, Yi, Zhang, Yechi, Sun, Dongsheng, Shimasaku, Kazuhiro, Greene, Jenny, Iwasawa, Kazushi, Kohno, Kotaro, Nagao, Tohru, Schulze, Andreas, Shibuya, Takatoshi, Hilmi, Miftahul, Schramm, Malte
We present deep Subaru/FOCAS spectra for two extreme emission line galaxies (EELGs) at $z\sim 1$ with strong {\sc[Oiii]}$\lambda$5007 emission lines, exhibiting equivalent widths (EWs) of $2905^{+946}_{-578}$ \AA\ and $2000^{+188}_{-159}$ \AA, compar
Externí odkaz:
http://arxiv.org/abs/2410.12198
Autor:
Narita, Takuto, Uchida, Hiroyuki, Vink, Jacco, Katsuda, Satoru, Umeda, Hideyuki, Yoshida, Takashi, Sato, Toshiki, Matsunaga, Kai, Tsuru, Takeshi Go
Circumstellar material (CSM) produced by mass loss from massive stars ($\gtrsim10 M_{\odot}$) through strong stellar winds or binary stripping provides rich information for understanding progenitors of core-collapse supernova remnants. In this paper
Externí odkaz:
http://arxiv.org/abs/2409.17542
Autor:
Umeda, Hikaru, Iiduka, Hideaki
The performance of mini-batch stochastic gradient descent (SGD) strongly depends on setting the batch size and learning rate to minimize the empirical loss in training the deep neural network. In this paper, we present theoretical analyses of mini-ba
Externí odkaz:
http://arxiv.org/abs/2409.08770
Autor:
Nagele, Chris, Umeda, Hideyuki
In recent years, the formation and evolution of rapidly accreting supermassive stars has received significant attention in the hope of better understanding the origin of high redshift quasars. It is often taken for granted that once formed, these sup
Externí odkaz:
http://arxiv.org/abs/2408.08352
Amplitude-modulation atomic force microscopy (AM-AFM) measures nanoscale surface structures by detecting changes in the cantilever oscillation amplitude, contributing to materials research. AM-AFM can non-destructively observe fragile molecules, such
Externí odkaz:
http://arxiv.org/abs/2407.18748