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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 2.

Phase-averaged XRISM/Resolve spectra of the AX J1745.6−2901 extraction region and the MAXI J1744−294 extraction region, fitted simultaneously to account for contamination in the Resolve field of view. The AX J1745.6−2901 data and best-fit total model are shown in black and red, respectively, while the MAXI J1744−294 data and best-fit total model are shown in silver and blue, respectively. The best-fit model includes two-velocity absorption components in AX J1745.6−2901. Orange curves show the model contributions to the AX J1745.6−2901 region spectrum from AX J1745.6−2901 (solid), MAXI J1744−294 (dashed), Sgr A East (long-dashed), and the Galactic center X-ray emission (GCXE; dotted). The labeled vertical markers indicate the main absorption features included in the AX J1745.6−2901 model. The lower panels show the residuals in units of (data−model)/error.

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