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The Walkaway Star HP Tau/G2: Evidence for a Stellar Merger

  • Authors: Bo Reipurth, J. Bally, P. Friberg, D. M. Faes, C. Briceño, M. S. Connelley, C. Flores, A. M. Cody, H. Zinnecker

Bo Reipurth et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 15.

The limit between Darwin stable and Darwin unstable binaries is a steep function of the mass ratio. Very small mass ratios <0.1 are far more likely to lead to a merger than binaries with higher mass ratios. R1 is the radius of the primary, and acrit is the separation at which the binary becomes Darwin unstable.

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