Investigating the Ultracompact X-Ray Binary Candidate SLX 1735-269 with NICER and NuSTAR
Abstract
We present two simultaneous NICER and NuSTAR observations of the ultracompact X-ray binary (UCXB) candidate SLX 1735‑269 while the source was in two different spectral states. Using various reflection modeling techniques, we find that XILLVERCO, a model used for fitting X-ray spectra of UCXBs with high carbon and oxygen abundances is an improvement over RELXILL or RELXILLNS, which instead contains solar-like chemical abundances. This provides indirect evidence in support of the source being ultracompact. We also use this reflection model to get a preliminary measurement of the inclination of the system,
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 2024
- DOI:
- arXiv:
- arXiv:2401.12371
- Bibcode:
- 2024ApJ...968...51M
- Keywords:
-
- Low-mass x-ray binary stars;
- X-ray binary stars;
- Neutron stars;
- 939;
- 1811;
- 1108;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 12 Pages, 8 Figures, 4 Tables, Accepted for Publication in ApJ