193 citations · 532 across the 13 of their papers we have counts for
7 papers · 1 filter
Discovery of a Faint Old Stellar System at 150 kpc
T. Sakamoto, T. Hasegawa
We report the detection of a faint old stellar system at (SDSS J1257+3419), based on the spatial distribution of bright red-giant branch stars i…
Kinematics of Tidal Debris from Omega Centauri's Progenitor Galaxy
Arihiro Mizutani, Masashi Chiba, Tsuyoshi Sakamoto
We present the kinematic properties of a tidally disrupted dwarf galaxy in the Milky Way, based on the hypothesis that its central part once contained the most massive Galactic glo…
The Mass of the Milky Way: Limits from a Newly Assembled Set of Halo Objects
Tsuyoshi Sakamoto, Masashi Chiba, Timothy C. Beers
We set new limits on the mass of the Milky Way, making use of the latest kinematic information for Galactic satellites and halo objects. In order to bind these sample objects to th…
Relativistic Thermal Bremsstrahlung Gaunt Factor for the Intracluster Plasma. III. Frequency Integrated Emissivity
Naoki Itoh, Shugo Kusano, Tsuyoshi Sakamoto +1
We present accurate analytic fitting formulae for the frequency integrated Gaunt factors for the relativistic as well as nonrelativistic thermal bremsstrahlung which is relevant to…
Relativistic Thermal Bremsstrahlung Gaunt Factor for the Intracluster Plasma. III. Analytic Fitting Formula for the Nonrelativistic Exact Gaunt Factor
Naoki Itoh, Shugo Kusano, Tsuyoshi Sakamoto +2
We present an accurate analytic fitting formula for the thermal bremsstrahlung Gaunt factor in the nonrelativistic limit. The fitting formula excellently reproduces the numerical r…
Relativistic Thermal Bremsstrahlung Gaunt Factor for the Intracluster Plasma. II. Analytic Fitting Formulae
Naoki Itoh, Tsuyoshi Sakamoto, Shugo Kusano +2
We present accurate analytic fitting formulae which summarize the results of the recent calculation by Nozawa, Itoh and Kohyama on the relativistic thermal bremsstrahlung Gaunt fac…