264 citations · 2k across the 46 of their papers we have counts for
8 papers · 2 filters
ALMA CO (J=1--0) imaging of the nearby galaxy M83: Variations in the efficiency of star formation in giant molecular clouds
Akihiko Hirota, Fumi Egusa, Junichi Baba +6
We present results of the CO (1--0) mosaic observations of the nearby barred-spiral galaxy M83 obtained with the Atacama Large Millimeter/submillimeter Array (ALMA). The tot…
Modeling the Milky Way as a Dry Galaxy
Michiko S. Fujii, Jeroen Bédorf, Junichi Baba +1
We construct a model for the Milky Way Galaxy composed of a stellar disc and bulge embedded in a dark-matter halo. All components are modelled as -body systems with up to 8 bill…
Radial Distribution of Stellar Motions in Gaia DR2
Daisuke Kawata, Junichi Baba, Ioana Ciucă +4
By taking advantage of the superb measurements of position and velocity for an unprecedented large number of stars provided in Gaia DR2, we have generated the first maps of the rot…
Metallicity dependence of the Hercules stream in Gaia/RAVE data -- explanation by non-closed orbits
Kohei Hattori, Naoteru Gouda, Taihei Yano +4
The origin of the Hercules stream, the most prominent velocity substructure in the Solar neighbour disc stars, is still under debate. Recent accurate measurements of position, velo…
Galactic Rotation from Cepheids with Gaia DR2 and Effects of Non-Axisymmetry
Daisuke Kawata, Jo Bovy, Noriyuki Matsunaga +1
We apply a simple axisymmetric disc model to 218 Galactic Cepheids whose accurate measurements of the distance and velocities are obtained by cross-matching an existing Cepheids ca…
Large velocity dispersion of molecular gas in bars of strongly barred galaxies, NGC 1300 and NGC 5383
Fumiya Maeda, Kouji Ohta, Yusuke Fujimoto +2
We carried out CO(J = 1 -0) observations toward bar and arm regions of strongly barred galaxies, NGC 1300 and NGC 5383, with the Nobeyama 45-m radio telescope (beamsize of 1…