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First Detection of the Van Hoof Effect in First-overtone RR Lyrae Stars: A New Kinematic Classification of Shock Waves

  • Authors: Merieme Chadid, Liyong Liu, Jean Vernin, Peng Zong

Merieme Chadid et al 2026 The Astrophysical Journal Letters 1010 .

  • Provider: AAS Journals

Caption: Figure 2.

Zero-point free velocity residuals versus pulsation phase. Top: centered Hα relative to centered CMHRV. Bottom: centered Fe II relative to centered CMHRV. The small error bar represents the quadrature combination of two 0.10 km s−1 radial-velocity uncertainties. Lines are interrupted across unsampled intervals larger than 0.15 in phase.

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