108 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kagoshima UniversityJP12 papers
- National Astronomical Observatory of JapanJP2 papers
- The Graduate University for Advanced Studies, SOKENDAIJP2 papers
- The University of TokyoJP2 papers
- Aalto UniversityFI1 paper
- Academia SinicaTW1 paper
- Institute of Astronomy and Astrophysics, Academia SinicaTW1 paper
- Istituto di Radioastronomia di BolognaIT1 paper
- Japan Aerospace Exploration AgencyJP1 paper
- Kyushu Tokai UniversityJP1 paper
- Leiden Observatory1 paper
- Leiden UniversityNL1 paper
12 papers
A differentiable hydrodynamical approach to the Milky Way bar pattern speed with CO longitude--velocity data
Junichi Baba, Kohei Hattori
We present a differentiable hydrodynamical framework for modeling barred gas flow in the Milky Way and constraining broad low-loss regions in bar-pattern-speed parameter space from…
Axisymmetric Jeans modelling systematically overestimates the circular speed in the inner Milky Way
Tomoki Yamaguchi, Junichi Baba
We quantify systematic biases in rotation curves inferred from steady, axisymmetric Jeans modelling when the underlying stellar velocity field is non-axisymmetric. Using a high-res…
Bar-Informed Kinematic-Distance Mapping of Molecular Gas in the Inner Milky Way
Junichi Baba
We present a bar-informed kinematic-distance (BIKD) method to reconstruct face-on molecular-gas maps of the inner Milky Way from PPV data, relaxing the standard assumption of axisy…
Kinematic-Distance Biases in the Inner Milky Way from a Stellar-Dynamically Constrained Bar
Junichi Baba
We quantify how bar-driven non-circular motions bias Milky-Way gas maps inferred with the kinematic-distance (KD) method. KD reconstructions of H\,\textsc{i} and CO surveys assume…
Bar-driven Streaming Motions Mimic a Massive Bulge in the Inner Milky Way
Junichi Baba
The circular speed curve of the Milky Way provides a key constraint on its mass distribution, reflecting the axisymmetric component of the gravitational potential. This is especial…
Influence of Bar Formation on Star Formation Segregation and Stellar Migration: Implications for Variations in the Age Distribution of Milky Way Disk Stars
Junichi Baba
We present a chemo-dynamical -body/hydrodynamic simulation of an isolated Milky Way-like galaxy to investigate how bar formation influences star formation rates, stellar migrati…
First VLBI Imaging of SiO , Masers in VY Canis Majoris
Hiroko Shinnaga, Miyako Oyadomari, Hiroshi Imai +8
We achieved the first VLBI detections of the ground vibrational state () SiO (hereafter, SiO) and SiO masers of the rotational transitions, to…
Cardinality and Representation of Stone Relation Algebras
Hitoshi Furusawa, Walter Guttmann
Previous work has axiomatised the cardinality operation in relation algebras, which counts the number of edges of an unweighted graph. We generalise the cardinality axioms to Stone…
Multi-phase Nature of a Radiation-Driven Fountain with Nuclear Starburst in a Low-mass Active Galactic Nucleus
Keiichi Wada, Marc Schartmann, Rowin Meijerink
The structures and dynamics of molecular, atomic, and ionized gases are studied around a low-luminosity active galactic nucleus (AGN) with a small () black ho…
Fourth-order dispersive systems on the one-dimensional torus
Hiroyuki Chihara
We present the necessary and sufficient conditions of the well-posedness of the initial value problem for certain fourth-order linear dispersive systems on the one-dimensional toru…
Exploring the central sub-pc region of the γ-ray bright radio galaxy 3C 84 with the VLBA at 43 GHz in the period of 2002-2008
Kenta Suzuki, Hiroshi Nagai, Motoki Kino +13
Following the discovery of a new radio component right before the GeV γ-ray detection since 2008 August by Fermi Gamma-ray Space Telescope, we present a detailed study of the kinem…
J-Net Galactic Plane Survey of VLBI Radio Sources for VLBI Exploration of Radio Astrometry (VERA)
M. Honma
In order to search for new VLBI sources in the Galactic plane that can be used as phase reference sources in differential VLBI, we have conducted 22 GHz observations of radio sourc…