Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Fukushima, Keita"'
Autor:
Fukushima, Keita, Nagamine, Kentaro, Matsumoto, Akinori, Isobe, Yuki, Ouchi, Masami, Saitoh, Takayuki, Hirai, Yutaka
The chemical composition of galaxies offers vital insights into their formation and evolution. A key aspect of this study is the correlation between helium abundance (He/H) and metallicity, which is instrumental in estimating the primordial helium ge
Externí odkaz:
http://arxiv.org/abs/2401.06450
Autor:
Xu, Yi, Ouchi, Masami, Isobe, Yuki, Nakajima, Kimihiko, Ozaki, Shinobu, Bouché, Nicolas F., Wise, John H., Emsellem, Eric, Kusakabe, Haruka, Hattori, Takashi, Nagao, Tohru, Chiaki, Gen, Fukushima, Hajime, Harikane, Yuichi, Hayashi, Kohei, Hirai, Yutaka, Kim, Ji Hoon, Maseda, Michael V., Nagamine, Kentaro, Shibuya, Takatoshi, Sugahara, Yuma, Yajima, Hidenobu, Aoyama, Shohei, Fujimoto, Seiji, Fukushima, Keita, Hatano, Shun, Inoue, Akio K., Ishigaki, Tsuyoshi, Kawasaki, Masahiro, Kojima, Takashi, Komiyama, Yutaka, Koyama, Shuhei, Koyama, Yusei, Lee, Chien-Hsiu, Matsumoto, Akinori, Mawatari, Ken, Moriya, Takashi J., Motohara, Kentaro, Murai, Kai, Nishigaki, Moka, Onodera, Masato, Ono, Yoshiaki, Rauch, Michael, Saito, Tomoki, Sasaki, Rin, Suzuki, Akihiro, Takeuchi, Tsutomu T., Umeda, Hiroya, Umemura, Masayuki, Watanabe, Kuria, Yabe, Kiyoto, Zhang, Yechi
Publikováno v:
The Astrophysical Journal, Volume 961, Number 1, January 2024, Page 49-53
We present demography of the dynamics and gas-mass fraction of 33 extremely metal-poor galaxies (EMPGs) with metallicities of $0.015-0.195~Z_\odot$ and low stellar masses of $10^4-10^8~M_\odot$ in the local universe. We conduct deep optical integral-
Externí odkaz:
http://arxiv.org/abs/2303.12467
We examine star formation and chemical enrichment in protoclusters (PCs) using cosmological zoom-in hydrodynamic simulations. We find that the total star formation rate (SFR) in all PC ($>10^{14.4}\,h^{-1}$M$_\odot$) reaches $>10^4\,\mathrm{M}_\odot
Externí odkaz:
http://arxiv.org/abs/2212.12281
Autor:
Isobe, Yuki, Ouchi, Masami, Nakajima, Kimihiko, Ozaki, Shinobu, Bouche, Nicolas F., Wise, John H., Xu, Yi, Emsellem, Eric, Kusakabe, Haruka, Hattori, Takashi, Nagao, Tohru, Chiaki, Gen, Fukushima, Hajime, Harikane, Yuichi, Hayashi, Kohei, Hirai, Yutaka, Kim, Ji Hoon, Maseda, Michael V., Nagamine, Kentaro, Shibuya, Takatoshi, Sugahara, Yuma, Yajima, Hidenobu, Aoyama, Shohei, Fujimoto, Seiji, Fukushima, Keita, Hatano, Shun, Inoue, Akio K., Ishigaki, Tsuyoshi, Kawasaki, Masahiro, Kojima, Takashi, Komiyama, Yutaka, Koyama, Shuhei, Koyama, Yusei, Lee, Chien-Hsiu, Matsumoto, Akinori, Mawatari, Ken, Moriya, Takashi J., Motohara, Kentaro, Murai, Kai, Nishigaki, Moka, Onodera, Masato, Ono, Yoshiaki, Rauch, Michael, Saito, Tomoki, Sasaki, Rin, Suzuki, Akihiro, Takeuchi, Tsutomu T., Umeda, Hiroya, Umemura, Masayuki, Watanabe, Kuria, Yabe, Kiyoto, Zhang, Yechi
We present kinematics of 6 local extremely metal-poor galaxies (EMPGs) with low metallicities ($0.016-0.098\ Z_{\odot}$) and low stellar masses ($10^{4.7}-10^{7.6} M_{\odot}$). Taking deep medium-high resolution ($R\sim7500$) integral-field spectra w
Externí odkaz:
http://arxiv.org/abs/2206.04709
Autor:
Matsumoto, Akinori, Ouchi, Masami, Nakajima, Kimihiko, Kawasaki, Masahiro, Murai, Kai, Motohara, Kentaro, Harikane, Yuichi, Ono, Yoshiaki, Kushibiki, Kosuke, Koyama, Shuhei, Aoyama, Shohei, Konishi, Masahiro, Takahashi, Hidenori, Isobe, Yuki, Umeda, Hiroya, Sugahara, Yuma, Onodera, Masato, Nagamine, Kentaro, Kusakabe, Haruka, Hirai, Yutaka, Moriya, Takashi J., Shibuya, Takatoshi, Komiyama, Yutaka, Fukushima, Keita, Fujimoto, Seiji, Hattori, Takashi, Hayashi, Kohei, Inoue, Akio K., Kikuchihara, Shotaro, Kojima, Takashi, Koyama, Yusei, Lee, Chien-Hsiu, Mawatari, Ken, Miyata, Takashi, Nagao, Tohru, Ozaki, Shinobu, Rauch, Michael, Saito, Tomoki, Suzuki, Akihiro, Takeuchi, Tsutomu T., Umemura, Masayuki, Xu, Yi, Yabe, Kiyoto, Zhang, Yechi, Yoshii, Yuzuru
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 ($<0.1 Z_\odot$) galaxies (E
Externí odkaz:
http://arxiv.org/abs/2203.09617
Autor:
Hino, Kimihiro, Takeuchi, Moe, Fukushima, Keita, Kikuchi, Hiroyuki, Inoue, Shigeru, Lowe, Melanie, Cerin, Ester
Publikováno v:
Frontiers of Urban & Rural Planning; 9/30/2024, Vol. 2 Issue 1, p1-13, 13p
Akademický článek
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Publikováno v:
Phys. Rev. D 90, 095007 (2014)
Recent experimental results from the LHC have placed strong constraints on the masses of QCD-charged superpartners. The MSSM parameter space is also constrained by the measurement of the Higgs boson mass, and the requirement that the relic density of
Externí odkaz:
http://arxiv.org/abs/1406.4903
Autor:
Furuishi, Takayuki, Kunimasu, Koji, Fukushima, Keita, Ogino, Takashi, Okamoto, Kaoru, Yonemochi, Etsuo, Tomono, Kazuo, Suzuki, Toyofumi
Publikováno v:
In Journal of Drug Delivery Science and Technology December 2019 54
Publikováno v:
Phys. Rev. D 89, 015010 (2014)
The existence of old neutron stars deeply constrains self-interacting fermion dark matter, which can form star-killing black holes. We quantify this constraint on dark matter-nucleon scattering, considering collapse scenarios that broaden bounds over
Externí odkaz:
http://arxiv.org/abs/1310.3509