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15 papers
Galactic Archaeology with the Subaru `Ånohi`ula Prime Focus Spectrograph Strategic Program
Masashi Chiba, Rosemary F. G. Wyse, Evan N. Kirby +47
The recently commissioned Subaru `Ånohi`ula Prime Focus Spectrograph (PFS) will obtain spectra from nearly 2,400 fibers that cover 1.24 square degrees. The 360 night Subaru Strate…
The Milky Way Tomography with Subaru Hyper Suprime-Cam: Implications for the past orbit of the Large Magellanic Cloud
Yoshihisa Suzuki, Masashi Chiba, Rosemary F. G. Wyse
We report the discovery of diffuse stellar substructure in the Milky Way's outer halo toward Boötes, unveiled by deep imaging data of the Subaru/Hyper Suprime-Cam. This substructu…
The Milky Way Tomography with Subaru Hyper Suprime-Cam. II. Global halo structure
Yoshihisa Suzuki, Masashi Chiba, Rosemary F. G. Wyse +1
We investigate the structure of the Milky Way's stellar halo within 70 kpc of the Sun using a wide-field photometric catalog obtained from the Hyper Suprime-Cam (HSC) Subaru Strate…
A Long Stellar Stream in M83: Possible Connection Between XUV Disks and Minor Mergers?
Itsuki Ogami, Sakurako Okamoto, Annette M. N. Ferguson +5
We present the confirmation and characterization of a long stream (S-stream) in the southern part of M83. This feature is revealed using deep wide-field photometric data obtained b…
Fuzzy Dark Matter and the Impact of Core--Halo Diversity on Its Particle Mass Constraints
Dafa Wardana, Kohei Hayashi, Masashi Chiba +1
We investigate how diversity in the core--halo mass relation and the inclusion of higher-order velocity moments affect constraints on the fuzzy dark matter particle mass () i…
Subaru/HSC NB395 view of NGC 5466: metallicity, mass function, and the nature of its tidal stream
Itsuki Ogami, Miho N. Ishigaki, Pete B. Kuzma +6
We present a deep photometric study of the globular cluster NGC 5466 and its tidal stream using Subaru/Hyper Suprime-Cam (HSC) imaging with the metallicity-sensitive narrowband fil…