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One Large Blob and Many Streams Frosting the nearby Stellar Halo in Gaia DR2

  • Authors: Helmer Koppelman, Amina Helmi, and Jovan Veljanoski

2018 The Astrophysical Journal Letters 860 L11.

  • Provider: AAS Journals

Caption: Figure 2.

Velocity distribution of halo stars (black dots and colored circles) selected according to the Toomre diagram shown in Figure 1. The blue density maps show the velocity distributions of all stars within 1 kpc from the Sun and reveal the contribution of the disk(s). The left panel illustrates particularly clearly the effect of our kinematic selection criterion. The colored stars mark the location of tight clumps that are easy to discern because of their large velocities.

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