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Learning and Predicting the Nonlinear Variability of X-Ray Binaries with the Koopman Operator

  • Authors: Eric Miao, Ruo-Yu Shang, Kaya Mori, Reshmi Mukherjee

Eric Miao et al 2026 The Astrophysical Journal Supplement Series 286 .

  • Provider: AAS Journals

Caption: Figure 4.

Same as Figure 3, but with process noise D = 0.2. Eigenvalues are shifted away from the imaginary axis, broadening the corresponding QPO peaks in the PSD. The red-highlighted eigenvalue remains relatively close to zero, preserving a narrow QPO, while the green-highlighted eigenvalue shifts further, producing a broader peak.

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