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An Updated Model for the Perseus Spiral Arm from Trigonometric Parallax and 3D Kinematic Distances of Distant Massive Stars

  • Authors: L. J. Hyland, M. J. Reid, S. P. Ellingsen, A. Brunthaler, X. W. Zheng, K. M. Menten

L. J. Hyland et al 2026 The Astrophysical Journal 1004 .

  • Provider: AAS Journals

Caption: Figure 2.

Example of the distance determination process for G070.29+01.60. The Vlsr PDF (dashed red) and μl*, μb (dashed blue, cyan) proper motion PDFs are multiplied together to give the 3DKD PDF (magenta). This is then multiplied by the parallax PDF (green) to give the final PDF (black), the peak of which gives the maximum likelihood distance.

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