HLX-1作为中等质量黑洞周围的重复部分潮汐瓦解事件
HLX-1 as a Repeating Partial Tidal Disruption Event around an Intermediate-Mass Black Hole
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中文总结 AI 辅助
该研究通过相对论薄盘时变模型拟合HLX-1的多次X射线爆发，得出中等质量黑洞质量约10^4.5太阳质量，支持其作为重复部分潮汐瓦解事件的解释。
中文摘要 AI 辅助
ESO 243$-$49 HLX--1是最早已知的令人信服的中等质量黑洞（IMBH）候选体之一，但其反复出现的X射线爆发的起源仍未确定。在这项工作中，我们同时用相对论薄盘时变模型拟合HLX--1的爆发。黑洞和盘几何参数在各历元间被固定，而注入质量和时标参数则针对每次爆发分别拟合。我们还包括了在一次爆发峰值附近获得的同期\textit{HST}紫外/光学/红外光谱能量分布，这约束了盘的整体温度和半径尺度。软态数据与一个共同的全局解一致，其中黑洞质量$\text{log}_{10}(M_{\bullet}/M_\text{odot})=4.5±0.2$，盘形成半径$\text{log}_{10}(r_0/r_g)=3.8±0.3$。爆发之间的差异主要由盘质量和黏滞时标的适度变化来描述。推断的注入质量通常为每次爆发$\text{sim}10^{-3}M_\text{odot}$，要求在整个观测序列中总燃料供应至少为几个$\text{times}10^{-3}M_\text{odot}$。这个质量尺度和盘大小与低质量伴星的重复部分剥离一致。耀斑间隙和拟合盘半径的简单开普勒映射意味着一个高度椭圆的轨道，其近心点刚好在伴星的潮汐半径之外。这些结果支持HLX--1起源的重复部分潮汐瓦解解释。
英文摘要
ESO 243$-$49 HLX--1 is one of the first known compelling intermediate-mass black hole (IMBH) candidates, but the origin of its recurrent X-ray outbursts remains unsettled. In this work we fit the HLX--1 outbursts simultaneously with a relativistic thin-disk time-dependent model. The black-hole and disk-geometry parameters are tied across epochs, while the injected mass and timing parameters are fitted separately for each outburst. We also include a contemporaneous \textit{HST} UV/optical/IR spectral energy distribution obtained near the peak of one outburst, which constrains the global temperature and radius scales of the disk. The soft-state data are consistent with a common global solution, with black hole mass $\log_{10}(M_{\bullet}/M_\odot)=4.5\pm0.2$ and disk formation radius $\log_{10}(r_0/r_g)=3.8\pm0.3$. The differences between outbursts are mainly described by modest changes in disk mass and viscous timescales. The inferred injected masses are typically $\sim 10^{-3}\,M_\odot$ per outburst, requiring a total fuel supply of at least a few $\times 10^{-3}\,M_\odot$ across the observed sequence. This mass scale, and the disk size, are consistent with repeated partial stripping of a low-mass donor. A simple Keplerian mapping of the flare gaps and fitted disk radius implies a highly eccentric orbit with a pericenter just outside the donor's tidal radius. These results support a repeating partial tidal disruption interpretation for the origin of HLX--1.
发表机构
- Princeton University（普林斯顿大学）
- Institute for Advanced Study（高等研究院）
- Johns Hopkins University（约翰斯·霍普金斯大学）
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