XRISM/Resolve finds a systematic east-west line-of-sight velocity gradient in W49B's ejecta, indicating bipolar flows rather than an expanding disk.
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Kinematic Evidence for Bipolar Ejecta Flows in the Galactic SNR W49B
XRISM/Resolve finds a systematic east-west line-of-sight velocity gradient in W49B's ejecta, indicating bipolar flows rather than an expanding disk.