准周期喷发与重复核瞬变事件的统一时标关系
A Unified Timescale Relation for Quasi-Periodic Eruptions and Repeated Nuclear Transients
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中文总结 AI 辅助
本研究通过汇编准周期喷发与重复核瞬变事件样本，发现复发时标与耀发上升时标间存在紧密的近线性统一关系，为理解核瞬变时标提供了实用框架。
中文摘要 AI 辅助
准周期喷发（QPEs）和重复核瞬变事件（RNTs）表现为来自星系核的重复高振幅耀发，但其特征时标仍知之甚少。在本工作中，我们汇编了这些系统的样本，并研究了耀发时标与黑洞质量之间的经验标度关系。我们发现，在QPE和RNT合并样本中，复发时标对黑洞质量呈正相关但高度离散的依赖关系，近似满足 $t_{\rm rec}\propto M_{\rm BH}^{1.19^{+0.52}_{-0.47}}$，内禀离散度为0.95 dex。值得注意的是，我们发现了QPEs和RNTs的复发时标与耀发时标之间存在紧密的近线性关系，由 $t_{\rm rec}\propto t_{\rm rise}^{1.00\pm0.07}$ 描述，内禀离散度为0.29 dex。这一关系跨越了从QPEs的小时级到核瞬变事件的月级和年级时标。我们进一步发现，QPEs和RNTs近似遵循复发时标与耀发上升时标之间的共同经验关系，尽管该关系的物理起源仍不确定。我们的发现揭示了RNTs中共同的唯象时标联系，为其时间行为的表征提供了一个实用框架。
英文摘要
Quasi-periodic eruptions (QPEs) and recurrent nuclear transients (RNTs) exhibit recurrent high-amplitude flares from galactic nuclei, yet their characteristic timescales remain poorly understood. In this work, we compile a sample of these systems and investigate empirical scaling relations between flare timescales and black hole masses. We find that the recurrence timescale exhibits a positive but highly scattered dependence on black hole mass in the combined QPE and RNT sample, approximately following $t_{\rm rec}\propto M_{\rm BH}^{1.19^{+0.52}_{-0.47}}$ with an intrinsic scatter of 0.95 dex. Remarkably, we uncover a tight nearly linear relation between recurrence time and flare timescale for QPEs and RNTs, described by $t_{\rm rec}\propto t_{\rm rise}^{1.00\pm0.07}$ with an intrinsic scatter of 0.29 dex. This relation extends across timescales from hours for QPEs to months and years for nuclear transients. We further find that QPEs and RNTs approximately follow a common empirical relation between recurrence time and flare rise time, although the physical origin of this relation remains uncertain. Our findings reveal a common phenomenological timescale link across RNTs, providing a practical framework for characterizing their temporal behavior.
发表机构
- University of Science and Technology of China（中国科学技术大学）
- Guizhou University（贵州大学）
- Institute of Deep Space Sciences, Deep Space Exploration Laboratory（深空科学研究所，深空探测实验室）
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