Kinematics of 61,883 DESI stars indicate the Monoceros Ring is a Sagittarius-induced, corotating spiral arm with passage times 0.25 and 1.10 Gyr ago, and the Anticenter Stream is part of a broader vertical disk wave.
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Signatures of a Tidally Induced Spiral Arm at the Anticenter of the Milky Way and a Kinematically Extended Anticenter Stream Using DESI DR2
Kinematics of 61,883 DESI stars indicate the Monoceros Ring is a Sagittarius-induced, corotating spiral arm with passage times 0.25 and 1.10 Gyr ago, and the Anticenter Stream is part of a broader vertical disk wave.