| Autor: |
Moutard, D. L., Ludlam, R. M., Sudha, M., Buisson, D. J. K., Cackett, E. M., Degenaar, N., Fabian, A. C., Gandhi, P., García, J. A., Shaw, A. W., Tomsick, J. A. |
| Předmět: |
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| Zdroj: |
Astrophysical Journal; 6/20/2024, Vol. 968 Issue 2, p1-9, 9p |
| Abstrakt: |
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, i = 57 − 7 + 23 degrees. This is consistent with our timing analysis, where a lack of eclipses indicates an inclination of i < 80°. The timing analysis is otherwise inconclusive, and we cannot confidently measure the orbital period of the system. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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