42 citations · 90 across the 9 of their papers we have counts for
9 papers
Linking dynamics and chemistry in barred galaxies through action-space mapping
Tetsuro Asano, Victor P. Debattista, Michiko S. Fujii
We aim to extend the action-based framework, proposed by a previous study, for assigning chemical information to collisionless -body simulations of barred galaxies, enabling mor…
Galaxy fly-bys sustain bar-halo friction and bar slowdown in disk galaxies
Rumi Kodama, Rimpei Chiba, Tetsuro Asano +2
Bars in disk galaxies slow down as they transfer their angular momentum to their dark matter halo via dynamical friction from near-resonant orbits. This bar-halo dynamical friction…
The First Star-by-star -body/Hydrodynamics Simulation of Our Galaxy Coupling with a Surrogate Model
Keiya Hirashima, Michiko S. Fujii, Takayuki R. Saitoh +9
A major goal of computational astrophysics is to simulate the Milky Way Galaxy with sufficient resolution down to individual stars. However, the scaling fails due to some small-sca…
Dynamics of tidal spiral arms: Machine learning-assisted identification of equations and application to the Milky Way
Marcel Bernet, Pau Ramos, Teresa Antoja +4
Understanding the spiral arms of the Milky Way (MW) remains a key open question in galactic dynamics. Tidal perturbations, such as the recent passage of the Sagittarius dwarf galax…
Ripples spreading across the Galactic disc. Interplay of direct and indirect effects of the Sagittarius dwarf impact
Tetsuro Asano, Michiko S. Fujii, Junichi Baba +2
Gaia data have revealed vertically asymmetric phase-space structures in the Milky Way (MW) disc, such as phase spirals, indicating vertical oscillations. These oscillations exhibit…
Growing Local arm inferred by the breathing motion
Tetsuro Asano, Daisuke Kawata, Michiko S. Fujii +1
Theoretical models of spiral arms suggest that the spiral arms provoke a vertical bulk motion in disc stars. By analysing the breathing motion, a coherent asymmetric vertical motio…
Impact of bar resonances in the velocity-space distribution of the solar neighbourhood stars in a self-consistent -body Galactic disc simulation
Tetsuro Asano, Michiko S. Fujii, Junichi Baba +3
The velocity-space distribution of the solar neighbourhood stars shows complex substructures. Most of the previous studies use static potentials to investigate their origins. Inste…
Environmental impact on star-forming galaxies in a cluster during course of galaxy accretion
Tetsuro Asano, Tadayuki Kodama, Kentaro Motohara +18
Galaxies change their properties as they assemble into clusters. In order to understand the physics behind that, we need to go back in time and observe directly what is occurring i…
Trimodal structure of Hercules stream explained by originating from bar resonances
Tetsuro Asano, Michiko S. Fujii, Junichi Baba +3
Gaia Data Release 2 revealed detailed structures of nearby stars in phase space. These include the Hercules stream, whose origin is still debated. Most of the previous numerical st…