Zobrazeno 1 - 10
of 142
pro vyhledávání: '"Ishigaki, Miho N"'
Autor:
Nakane, Minami, Ouchi, Masami, Nakajima, Kimihiko, Harikane, Yuichi, Tominaga, Nozomu, Takahashi, Koh, Yanagisawa, Hiroto, Watanabe, Kuria, Nomoto, Ken'ichi, Isobe, Yuki, Kashino, Daichi, Nishigaki, Moka, Ishigaki, Miho N., Ono, Yoshiaki, Takeda, Yui
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 data with the model spectra consisting of BPASS-stellar and CLOUDY-nebular spectra in the rest-fr
Externí odkaz:
http://arxiv.org/abs/2407.14470
Autor:
Ogami, Itsuki, Komiyama, Yutaka, Chiba, Masashi, Tanaka, Mikito, Guhathakurta, Puragra, Kirby, Evan N., Wyse, Rosemary F. G., Filion, Carrie, Kirihara, Takanobu, Ishigaki, Miho N., Hayashi, Kohei
We report the detection of a dwarf satellite candidate (Triangulum IV: Tri IV) of the Triangulum galaxy (M33) using the deep imaging of Subaru/Hyper Suprime-Cam (HSC). From the apparent magnitude of the horizontal branch in Tri IV, the heliocentric d
Externí odkaz:
http://arxiv.org/abs/2407.07481
Autor:
Hirai, Yutaka, Kirby, Evan N., Chiba, Masashi, Hayashi, Kohei, Anguiano, Borja, Saitoh, Takayuki R., Ishigaki, Miho N., Beers, Timothy C.
The chemical abundances of Milky Way's satellites reflect their star formation histories (SFHs), yet, due to the difficulty of determining the ages of old stars, the SFHs of most satellites are poorly measured. Ongoing and upcoming surveys will obtai
Externí odkaz:
http://arxiv.org/abs/2405.05330
Autor:
Zhang, Ruizhi, Matsuno, Tadafumi, Li, Haining, Aoki, Wako, Xue, Xiang-Xiang, Suda, Takuma, Zhao, Gang, Chen, Yuqin, Ishigaki, Miho N., Shi, Jianrong, Xing, Qianfan, Zhao, Jingkun
Very metal-poor (VMP) stars record the signatures of early accreted galaxies, making them essential tools for unraveling the early stages of Galaxy formation. Understanding the origin of VMP stars requires comprehensive studies of their chemical comp
Externí odkaz:
http://arxiv.org/abs/2405.02978
Autor:
Ogami, Itsuki, Komiyama, Yutaka, Chiba, Masashi, Tanaka, Mikito, Guhathakurta, Puragra, Kirby, Evan N., Wyse, Rosemary F. G., Filion, Carrie, Kirihara, Takanobu, Ishigaki, Miho N., Hayashi, Kohei
We analyze the outer regions of M33, beyond 15 kpc in projected distance from its center using Subaru/HSC multi-color imaging. We identify Red Giant Branch (RGB) stars and Red Clump (RC) stars using the surface gravity sensitive $NB515$ filter for th
Externí odkaz:
http://arxiv.org/abs/2403.14234
Autor:
Ogami, Itsuki, Tanaka, Mikito, Komiyama, Yutaka, Chiba, Masashi, Guhathakurta, Puragra, Kirby, Evan N., Wyse, Rosemary F. G., Filion, Carrie, Gilbert, Karoline M., Escala, Ivanna, Mori, Masao, Kirihara, Takanobu, Tanaka, Masayuki, Ishigaki, Miho N., Hayashi, Kohei, Lee, Myun Gyoon, Sharma, Sanjib, Kalirai, Jason S., Lupton, Robert H.
We analyse the M31 halo and its substructure within a projected radius of 120 kpc using a combination of Subaru/HSC NB515 and CFHT/MegaCam g- & i-bands. We succeed in separating M31's halo stars from foreground contamination with $\sim$ 90 \% accurac
Externí odkaz:
http://arxiv.org/abs/2401.00668
Autor:
Homma, Daisuke, Chiba, Masashi, Komiyama, Yutaka, Tanaka, Masayuki, Okamoto, Sakurako, Tanaka, Mikito, Ishigaki, Miho N., Hayashi, Kohei, Arimoto, Nobuo, Lupton, Robert H., Strauss, Michael A., Miyazaki, Satoshi, Wang, Shiang-Yu, Murayama, Hitoshi
We present the final results of our search for new Milky Way (MW) satellites using the data from the Hyper Suprime-Cam (HSC) Subaru Strategic Program (SSP) survey over $\sim 1,140$ deg$^2$. In addition to three candidates that we already reported, we
Externí odkaz:
http://arxiv.org/abs/2311.05439
Autor:
Domoto, Nanae, Lee, Jae-Joon, Tanaka, Masaomi, Lee, Ho-Gyu, Aoki, Wako, Ishigaki, Miho N., Wanajo, Shinya, Kato, Daiji, Hotokezaka, Kenta
Kilonova spectra provide us with information of r-process nucleosynthesis in neutron star mergers. However, it is still challenging to identify individual elements in the spectra mainly due to lack of experimentally accurate atomic data for heavy ele
Externí odkaz:
http://arxiv.org/abs/2309.01198
Autor:
Tanaka, Masaomi, Domoto, Nanae, Aoki, Wako, Ishigaki, Miho N., Wanajo, Shinya, Hotokezaka, Kenta, Kawaguchi, Kyohei, Kato, Daiji, Lee, Jae-Joon, Lee, Ho-Gyu, Hirano, Teruyuki, Kotani, Takayuki, Kuzuhara, Masayuki, Nishikawa, Jun, Omiya, Masashi, Tamura, Motohide, Ueda, Akitoshi
Observations of the kilonova from a neutron star merger event GW170817 opened a way to directly study r-process nucleosynthesis by neutron star mergers. It is, however, challenging to identify the individual elements in the kilonova spectra due to la
Externí odkaz:
http://arxiv.org/abs/2306.04697
Autor:
Watanabe, Kuria, Ouchi, Masami, Nakajima, Kimihiko, Isobe, Yuki, Tominaga, Nozomu, Suzuki, Akihiro, Ishigaki, Miho N., Nomoto, Ken'ichi, Takahashi, Koh, Harikane, Yuichi, Hatano, Shun, Kusakabe, Haruka, Moriya, Takashi J., Nishigaki, Moka, Ono, Yoshiaki, Onodera, Masato, Sugahara, Yuma
We present gas-phase elemental abundance ratios of 7 local extremely metal-poor galaxies (EMPGs) including our new Keck/LRIS spectroscopy determinations together with 33 JWST $z\sim 4-10$ star-forming galaxies in the literature, and compare chemical
Externí odkaz:
http://arxiv.org/abs/2305.02078