논문 상세보기
ACCRETION-JET MODEL FOR THE HARD X-ray Γ — LX CORRELATION IN BLACK HOLE X-ray BINARIES KCI 등재
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/385695
pp.565-568
In this work, we study the correlation between the photon index (Γ) of the X-ray spectrum and the 2-10 keV X-ray luminosity (LX) for black hole X-ray binaries (BHBs). The BHB sample is mainly from the quiescent, hard and intermediate states, with values of LX ranging from ~ 1030.5 to 1037.5 erg s-1. We nd that the photon index Γ is positively or negatively correlated with the X-ray luminosity LX, for LX above or below a critical value, ~ 1036.5 erg s-1. This result is consistent with previous works. Moreover, when LX ≤ ~ 1033 erg s-1, we found that the photon index is roughly independent of the X-ray luminosity. We interpret the above correlations in the framework of a coupled hot accretion flow - jet model. Besides, we also find that in the moderate-luminosity region, different sources may have different anti-correlation slopes, and we argue this diversity is caused by the different value of δ, which describes the fraction of turbulent dissipation that directly heats electrons.
1. INTRODUCTION
2. DATA AND CORRELATION
3. THE THEORITICAL MODEl
3.1. Hot Accretion Flow
3.2. Jet
3.3. Underlying Physics of the Γ — LX Correlation
4. THEORETICAL CALCULATION RESULTS
4.1. General Results
4.2. The Correlation of Individual BHBs
5. SUMMARY AND DISCUSSION
REFERENCES
