Search Results - "Milky Way dynamics"
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Formation of the Two-armed Phase Spiral from Multiple External Perturbations
Published 2025-01-01Subjects: “…Milky Way dynamics…”Recent studies using the Gaia DR3 data have revealed a two-armed phase spiral in the Z – V _Z phase space in the inner disk. In this study, we present new features of the two-armed phase spiral revealed by the Gaia data and a new mechanism to explain such features with multiple external perturbation...
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The Rotating Bulge and Halo in the Milky Way: Evidence of Angular Momentum Transferred from the Decelerating Bar
Published 2025-01-01Subjects: Get full textRecent observations indicate that both the Milky Way bulge and inner halo exhibit angular momentum, although the origin and evolution of this prograde signature remain ambiguous. One plausible scenario involves secular evolution induced by the central bar and spiral arms. In this study, we identifie...
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All-sky Kinematics of the Distant Halo: The Reflex Response to the LMC
Published 2025-01-01Subjects: Get full textThe infall of the Large Magellanic Cloud (LMC) is predicted to displace the inner Milky Way (MW), imprinting an apparent “reflex motion” on the observed velocities of distant halo stars. We construct the largest all-sky spectroscopic data set of luminous red giant stars from 50–160 kpc, including a...
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He Awa Whiria: The Tidal Streams of Interstellar Objects
Published 2025-01-01Subjects: Get full textUpcoming surveys are likely to discover a new sample of interstellar objects (ISOs) within the solar system, but questions remain about the origin and distribution of this population within the Galaxy. ISOs are ejected from their host systems with a range of velocities, spreading out into tidal stre...
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