Astrophys. J., 837, 111-111 (2017/March-2)
Nature of the diffuse source and its central point-like source in SNR 0509-67.5.
LITKE K.C., CHU Y.-H., HOLMES A., SANTUCCI R., BLINDAUER T., GRUENDL R.A., LI C.-J., PAN K.-C., RICKER P.M. and WEISZ D.R.
Abstract (from CDS):
We examine a diffuse emission region near the center of SNR 0509-67.5 to determine its nature. Within this diffuse region we observe a point-like source that is bright in the near-IR, but is not visible in the B and V bands. We consider an emission line observed at 6766 A and the possibilities that it is Lyα, Hα, and [O II] λ3727. We examine the spectral energy distribution (SED) of the source, comprised of Hubble Space Telescope B, V, I, J, and H bands in addition to Spitzer/IRAC 3.6, 4.5, 5.8, and 8 µm bands. The peak of the SED is consistent with a background galaxy at z ≃ 0.8 ± 0.2 and a possible Balmer jump places the galaxy at z ≃ 0.9 ± 0.3. These SED considerations support the emission line's identification as [O II] λ3727. We conclude that the diffuse source in SNR 0509-67.5 is a background galaxy at z ≃ 0.82. Furthermore, we identify the point-like source superposed near the center of the galaxy as its central bulge. Finally, we find no evidence for a surviving companion star, indicating a double-degenerate origin for SNR 0509-67.5.
© 2017. The American Astronomical Society. All rights reserved.
ISM: individual objects: SNR 0509-67.5 - ISM: supernova remnants - Magellanic Clouds - Magellanic Clouds
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