104 citations · 1.1k across the 42 of their papers we have counts for
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Effects of mass models on dynamical mass estimate: the case of ultra diffuse galaxy NGC1052-DF2
Kohei Hayashi, Shigeki Inoue
NGC1052-DF2 was recently discovered as the dark-matter deficient galaxy claimed by van Dokkum et al. (2018a, vD18). However, large uncertainties on its dynamical mass estimate have…
The Missing Satellite Problem Outside of the Local Group: I -- Pilot Observation
Masayuki Tanaka, Masashi Chiba, Kohei Hayashi +5
We present results from a pilot observation of nearby (~20 Mpc) galaxies with mass similar to that of the Milky Way (MW) to address the missing satellite problem. This is the first…
Dark halo structure in the Carina dwarf spheroidal galaxy: joint analysis of multiple stellar components
Kohei Hayashi, Michele Fabrizio, Ewa L. Łokas +4
Photometric and spectroscopic observations of the Carina dSph revealed that this galaxy contains two dominant stellar populations of different age and kinematics. The co-existence…