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IRS 9: The Case for a Dynamically Ejected Star from the Galactic Center

  • Authors: Matthew W. Hosek, Tuan Do, Smadar Naoz, Sanaea C. Rose, Gregory D. Martinez, Andrea M. Ghez, Rebecca Lewis-Merrill, Jessica R. Lu, Shoko Sakai, Jay Anderson

Matthew W. Hosek et al 2026 The Astrophysical Journal Letters 999 .

  • Provider: AAS Journals

Caption: Figure 6.

HST proper-motion error as a function of magnitude for the SiO masers compared to the HST catalog of astrometric reference stars within R ≤ 25″ from H25. IRS 9 is highlighted as a red star, while the other masers are denoted as red squares. The masers exhibit a median proper-motion error of 0.038 mas yr−1 across the sample.

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