论文标题
黑洞低质量X射线二进制Swift J1753.5-0127中紫外/光学排放的起源
The origin of UV/optical emission in the black hole low-mass X-ray binary Swift J1753.5-0127
论文作者
论文摘要
低质量X射线二进制文件（LMXB）中积聚黑洞（BHS）的发射涵盖了从无线电到X射线的宽能带。研究爆发过程中不同能量带的发射之间的相关性可以提供有关增生过程的宝贵信息。我们分析了BH-LMXB Swift J1753.5-0127的同时光学，紫外线（UV）和X射线数据，其$ \ sim $ \ sim $ 12年$ 12年的长时间爆发与{\ it neil gehrels swift swift observatory}。我们发现，在爆发的硬状态下，紫外/光学和X射线发射密切相关。我们将关系与幂律函数$ f_ {uv/optical} \ propto f _ {x}^β$ propto propto f_ {x}^β$，发现powerlaw索引$β$从$ \ sim $ 0.24增加到$ \ sim $ \ sim $ 0.33，为UV/Optical WaveLength，从$ \ sim $ \ sim $ \ sim $ 5400 — $ 5400— $ \ sim（$ \ sim）降低。我们探讨了这一可能的原因，并建议在Swift J1753.5-0127中，紫外线/光学发射由大半径上的粘附积聚盘主导。我们发现，偏离相关性的数据对应于爆发期间X射线频带中出现的低强度峰，并建议这些偏差是由从增生盘内部发射的发射驱动的。
The emission from the accreting black holes (BHs) in low-mass X-ray binaries (LMXBs) covers a broad energy band from radio to X-rays. Studying the correlations between emission in different energy bands during outbursts can provide valuable information about the accretion process. We analyse the simultaneous optical, ultraviolet (UV) and X-ray data of the BH-LMXB Swift J1753.5-0127 during its $\sim$ 12-year long outburst with the {\it Neil Gehrels Swift Observatory}. We find that the UV/optical and X-ray emission are strongly correlated during the hard states of the outburst. We fit the relation with a power-law function $F_{UV/optical} \propto F_{X}^β$ and find that the power-law index $β$ increases from $\sim$ 0.24 to $\sim$ 0.33 as the UV/optical wavelength decreases from $\sim$ 5400 Å (V) to $\sim$ 2030 Å (UVW2). We explore the possible reasons for this and suggest that in Swift J1753.5-0127 the UV/optical emission is dominated by a viscously heated accretion disc at large radii. We find that the data that deviate from the correlation correspond to the low-intensity peaks appeared in the X-ray band during the outburst, and suggest that these deviations are driven by the emission from the inner part of the accretion disc.
