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Down-bending Breaks in Galactic Disks Are an Intrinsic By-product of Inside-out Growth

  • Authors: Liufei Chen, 柳霏 陈, Min Du, 敏 杜, Shuai Lu, 帅 卢, Jing Li, 静 李, Luis C. Ho

Liufei Chen et al 2026 The Astrophysical Journal Letters 1003 .

  • Provider: AAS Journals

Caption: Figure 7.

Kinematic diagnostics of type II disk galaxies. Upper panel: velocity anisotropy parameter β as a function of normalized radius R/Rbreak, computed from midplane stars (∣z∣ < 0.3 kpc). Lower panel: ratio of velocity dispersion to mean rotational velocity σ/vϕ, computed from midplane stars (∣z∣ < 0.3 kpc).

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