A massive quiescent galaxy at z=3.449 exhibits low rotation (λ_Re = 0.123) consistent with slow-rotator kinematics, indicating early formation of dispersion-dominated systems.
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Stellar stream curvature constrains dark matter halo axis ratios and orientations in external galaxies, with some streams excluding broad ranges of flattenings while all support spherical halos for fixed flattening directions.
In the Magneticum simulation, a more circular satellite orbit produces a stream where visible stars come mostly from the progenitor core while a radial orbit produces shells that preserve the original radial ordering of stars from the satellite.
citing papers explorer
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A massive and evolved slow-rotating galaxy in the early Universe
A massive quiescent galaxy at z=3.449 exhibits low rotation (λ_Re = 0.123) consistent with slow-rotator kinematics, indicating early formation of dispersion-dominated systems.
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Potamides: Mapping Dark Matter Halo Shapes from Stellar Stream Tracks in the Local Universe
Stellar stream curvature constrains dark matter halo axis ratios and orientations in external galaxies, with some streams excluding broad ranges of flattenings while all support spherical halos for fixed flattening directions.
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Stream on: Evolution of stellar shells and streams - A case study
In the Magneticum simulation, a more circular satellite orbit produces a stream where visible stars come mostly from the progenitor core while a radial orbit produces shells that preserve the original radial ordering of stars from the satellite.