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arXiv 2401.09320astro-ph.HE
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AT2021lwx:另一例伴随强尘埃回波的中微子符合潮汐瓦解事件?

AT2021lwx: Another Neutrino-Coincident Tidal Disruption Event with a Strong Dust Echo?

Chengchao Yuan, Walter Winter, Cecilia Lunardini

AI总结:

本研究探讨高能中微子IC220405B与红移处的极端潮汐瓦解事件候选体AT2021lwx的关联,发现其具备强尘埃回波等已知中微子-TDE关联特征,用各向同性发射模型解释该关联,指出存在不确定性并建议后续长期观测与优化中微子方向重建。

摘要:

我们探讨了天体物理中微子IC220405B与近期报道的、位于红移$z=0.995$处的极端高能潮汐瓦解事件(TDE)候选体AT2021lwx(ZTF20abrbeie,又名“Scary Barbie”)之间可能存在的关联。尽管该TDE的位置与重建的中微子事件方向偏差约$2.6^\circ$(处于90%置信度定位区域之外),但该TDE候选体与迄今报道的中微子-TDE关联事件具有一些重要的共同特征:强红外尘埃回波、高光度、中微子相对于峰值质量吸积率的时间延迟约为数百天,以及观测到的高X射线光度。我们采用各向同性发射模型解释这一新关联,在该模型中,中微子由被加速的质子与红外光子碰撞产生。在考虑AT2021lwx的高红移后(通过在超大质量黑洞(SMBH)参考系解释数据),我们发现预期的中微子注量和中微子时间延迟在定性上与其他TDE的结果相当。由于目前仅能获取SMBH参考系中峰值后300天内的数据,尘埃回波的解释存在显著不确定性,因此预测的探测到的中微子数量$\mathcal N_ν\simeq3.0\times10^{-3}-0.012$也存在显著不确定性。我们建议对该天体开展更长期的后续观测,并提出在这一特定案例中优化中微子到达方向的重建工作。

英文摘要:

We discuss the possible association of an astrophysical neutrino (IC220405B) with the recently reported, extremely energetic tidal disruption event (TDE) candidate AT2021lwx (ZTF20abrbeie, aka ``Scary Barbie'') at redshift $z=0.995$. Although the TDE is about $2.6^\circ$ off the direction of the reconstructed neutrino event (outside the 90% confidence level localization region), the TDE candidate shares some important characteristics with so far reported neutrino-TDE associations: a strong infrared dust echo, high bolometric luminosity, a neutrino time delay with respect to the peak mass accretion rate of the order of hundred days, and a high observed X-ray luminosity. We interpret this new association using an isotropic emission model, where neutrinos are produced by the collision of accelerated protons with infrared photons. After accounting for the high redshift of AT2021lwx (by interpreting the data in the SMBH frame), we find that the expected neutrino fluences and neutrino time delays are qualitatively comparable to the other TDEs. Since data are only available up to 300 days post-peak in the SMBH frame, significant uncertainties exist in the dust echo interpretation, and therefore in the predicted number of neutrinos detected, $\mathcal N_ν\simeq3.0\times10^{-3}-0.012$. We recommend further follow-up on this object for an extended period and suggest refining the reconstruction of the neutrino arrival direction in this particular case.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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