利用IceCube寻找来自潮汐瓦解事件的中微子
Search for Neutrinos from Tidal Disruption Events with IceCube
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中文总结 AI 辅助
本研究利用IceCube中微子探测器,对89个潮汐瓦解事件(TDE)开展专项中微子搜索,经时变似然分析和堆叠搜索后未发现显著中微子超出,设定了TDE对弥散天体物理中微子流量贡献的上限。
中文摘要 AI 辅助
潮汐瓦解事件(TDE)理论上可通过加速质子与吸积盘及外流中的多波段光子发生光强子相互作用产生高能中微子,探测这些中微子将有助于深入了解TDE的动力学。利用宽视场望远镜观测到的TDE数量近期增加的优势,我们对光学/紫外和X射线波段符合的中微子开展专项搜索。我们基于X射线和光学/紫外观测筛选出89个TDE,采用两部分的时变似然分析方法搜索其中微子发射:第一部分搜索单个源的发射,拟合预期中微子发射的时间窗口;第二部分采用固定1年时间窗口的堆叠搜索,对喷流型和非喷流型TDE子群开展研究。两次搜索均未观测到显著的中微子超出,假设TDE为标准烛光,我们设定了在光学/紫外和X射线波段探测到的喷流型与非喷流型TDE对弥散天体物理中微子流量贡献的上限。
英文摘要
Tidal disruption events (TDEs) are theorized to produce high-energy neutrinos through photohadronic interactions between accelerated protons and multi-wavelength photons in the accretion disk and outflows. Detecting these neutrinos would provide insight into the dynamics of TDEs. Taking advantage of the recent increase in observed TDEs from wide field-of-view telescopes, we conduct a dedicated search for neutrinos coincident in optical/UV and X-ray wavelengths. We searched for neutrino emission from 89 TDEs selected based on X-ray and optical/UV observations using time-dependent likelihood analysis methods in two parts. First, we searched for emission from individual sources, where we fit the time window of expected neutrino emission. Second, we performed a study of jetted and non-jetted TDE subpopulations using a stacking search with a fixed one year time window. No significant neutrino excess was observed in either search. We set upper limits to the contribution of jetted and non-jetted TDEs detected in optical/UV and X-ray wavelengths to the diffuse astrophysical neutrino flux assuming TDEs are standard candles.
发表机构
- Loyola University Chicago(芝加哥洛约拉大学)
- Deutsches Elektronen-Synchrotron DESY(德国电子同步加速器中心)
- University of Canterbury(坎特伯雷大学)
- Université Libre de Bruxelles(布鲁塞尔自由大学)
- Niels Bohr Institute, University of Copenhagen(哥本哈根大学尼尔斯·玻尔研究所)
- TU Dortmund University(多特蒙德工业大学)
- University of Kansas(堪萨斯大学)
- Bartol Research Institute and Dept. of Physics and Astronomy, University of Delaware(特拉华大学巴托尔研究所及物理与天文学系)
- Marquette University(马凯特大学)
- Department of Physics and Laboratory for Particle Physics and Cosmology, Harvard University(哈佛大学物理系及粒子物理与宇宙学实验室)
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