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Distinct Velocity Components in the Absorption Lines of the Neutron Star X-Ray Binary AX J1745.6–2901

  • Authors: Kai Matsunaga, Maxime Parra, Yutaro Nagai, Teruaki Enoto, Yoshitomo Maeda, Takayuki Hayashi, Shifra Mandel, Kaya Mori, Hideki Uchiyama, Masayoshi Nobukawa, Hiroya Yamaguchi, Megumi Shidatsu, Ryota Tomaru

Kai Matsunaga et al 2026 The Astrophysical Journal Letters 1006 .

  • Provider: AAS Journals

Caption: Figure 4.

Left: the X-ray light curve (top) and folded light curve (bottom) of the AX J1745.6−2901 region. We assumed the orbital period of 30063 s, as reported from the 2024 observation (K. Tanaka et al. 2026). Based on the folded light curve, we excluded the eclipse interval (ϕ0ϕ = 0.96–0.04) and divided the remaining out-of-eclipse orbit into two natural phase bins: ϕ1 (ϕ = 0.04–0.50) and ϕ2 (ϕ = 0.50–0.96). The colors in the light curves correspond to these phase definitions in the folded light curve. Right: the scaled, zoomed spectra and the best-fit models in ϕ1 and ϕ2 around the Fe XXVI Lyα. The ϕ1 spectrum is multiplied by a factor of 10 for clarity.

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