Nature of the Diffuse Source and Its Central Point-like Source in SNR 0509-67.5

Katrina C. Litke, You Hua Chu, Abigail Holmes, Robert Santucci, Terrence Blindauer, Robert A. Gruendl, Chuan Jui Li, Kuo Chuan Pan, Paul M. Ricker, Daniel R. Weisz

Research output: Contribution to journalArticlepeer-review

Abstract

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 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.

Original languageEnglish (US)
Article number111
JournalAstrophysical Journal
Volume837
Issue number2
DOIs
StatePublished - Mar 10 2017

Keywords

  • ISM: individual objects (SNR 0509-67.5)
  • ISM: supernova remnants
  • Magellanic Clouds

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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