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Rapid Orbital Decay in the Ultracompact Double-degenerate Binary eRASSU J060839.5–704014

  • Authors: Rahul Sharma, Chandreyee Maitra, Frank Haberl, Joheen Chakraborty, Susanne Friedrich, Yong-Feng Huang, Chichuan Jin, Zhaosheng Li, Georgios Vasilopoulos, Yanjun Xu, Haonan Yang, Weimin Yuan

Rahul Sharma et al 2026 The Astrophysical Journal Letters 1007 .

  • Provider: AAS Journals

Caption: Figure 4.

The ultracompact binaries with known orbital period and their derivative (﹩\dot{P}﹩) (Table D1). In the absence of mass transfer, the pure GW decay corresponds to ﹩\dot{P}\propto {P}^{-5/3}﹩. Some of these systems follow the same curves with a constant chirp mass of ∼0.13 M⊙ and ∼0.32 M⊙, whereas eRASSU J060839.5–704014 diverges significantly.

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