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arXiv 2609.35998astro-ph.GAastro-ph.HE

离核潮汐瓦解事件在晚期阶段的发现:TDE 2023mfm 的案例

An Off-Nuclear Tidal Disruption Event Discovered At Late Times: The Case Of TDE 2023mfm

Itai Sfaradi, Ryan Chornock, Yuhan Yao, Erica Hammerstein, Jean Somalwar, Raffaella Margutti, Huei Sears, Robert Stein, Natalie LeBaron, Adelle J. Goodwin, Sjoe… 展开作者

Itai Sfaradi, Ryan Chornock, Yuhan Yao, Erica Hammerstein, Jean Somalwar, Raffaella Margutti, Huei Sears, Robert Stein, Natalie LeBaron, Adelle J. Goodwin, Sjoert van Velzen, Matthew J. Graham, Kate D. Alexander, Nayana A. J., Edo Berger, Jonathan Carney, Yvette Cendes, Collin T. Christy, Walter W. Golay, Wenbin Lu, James C. A. Miller-Jones, Charlotte Ward, Eli Wiston, Tracy X. Chen, Mansi M. Kasliwal, Frank J. Masci, Jesper Sollerman

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中文总结 AI 辅助

该研究报道了TDE 2023mfm的发现与分析,它源自宿主星系中心的漫游黑洞,具有离核偏移、高温持续和晚期射电辐射等特征,为理解潮汐瓦解事件提供了新案例。

中文摘要 AI 辅助

我们展示了光学选择的潮汐瓦解事件(TDE)2023mfm 的发现与分析,该事件源自一个位于大质量(约 10^11 太阳质量)星系中的漫游大质量黑洞(MBH),该星系中心存在一个低光度活动星系核(AGN)。我们对 ZTF、Lick、Keck、Swift、Chandra、XMM-Newton、HST 和 VLA 观测数据的分析表明,TDE 2023mfm 是一个 TDE-H,源自一个质量为 10^(6.2±0.5) 太阳质量的黑洞,该黑洞偏离其宿主星系中心 0.66±0.02 角秒,对应的投影距离为 1.08±0.04 千秒差距。TDE 2023mfm 展现出光学选择 TDE 的所有特征。其辐射在峰值后一个多月内保持高温,黑体温度约为 22,000±1,000 开尔文,g 波段光变曲线峰值光度为 (2.24^(+0.10)_(-0.11))×10^43 尔格每秒,并保持高于半极大光度 47.8^(+3.7)_(-3.5) 天。HST 观测到的晚期光学到紫外辐射表明,在 TDE 位置存在一个未分辨的恒星族群,其恒星质量为 10^7-10^8 太阳质量,可能是一个低质量矮星系或先前小型并合中剥离的星系。TDE 2023mfm 的射电辐射在光学发现至少一年后才出现,我们发现它可能源自延迟的外流,然而需要进一步观测来确定其真正起源。

英文摘要

We present the discovery and analysis of the optically selected tidal disruption event (TDE) 2023mfm, which originates from a wandering massive black hole (MBH) in a massive ($\sim 10^{11} \,$M$_{\odot}$) galaxy hosting a central low-luminosity active galactic nucleus (AGN). Our analysis of the ZTF, Lick, Keck, Swift, Chandra, XMM-Newton, HST, and VLA observations reveals that TDE 2023mfm is a TDE-H from a $10^{6.2 \pm 0.5}\,$M$_{\odot}$ black hole which is offset by $0.66 \pm 0.02$" from the center of its host galaxy, corresponding to a projected distance of $1.08 \pm 0.04$ kpc. TDE 2023mfm displays all the traits of optically selected TDEs. The emission remains hot, $T_{\rm bb} \sim 22,000 \pm 1,000$ K, for more than a month after peak, and the $g$-band light curve peaks at $\left( 2.24^{+0.10} _{-0.11} \right) \times 10^{43} \, \rm erg \, s^{-1}$ and stays above half-maximum luminosity for $47.8^{+3.7}_{-3.5}$ days. The late-time optical-to-UV emission observed with the HST suggests the presence of an unresolved stellar population with a stellar mass of $10^7-10^8\,$M$_{\odot}$ at the position of the TDE, possibly being a low-mass dwarf galaxy or a stripped galaxy from a previous minor merger. The radio emission from TDE 2023mfm emerges at least a year after optical discovery, and we find it likely that it originates from a delayed outflow, however, further observations are needed to determine its true origin.

发表机构

  • University of California, Berkeley(加州大学伯克利分校)
  • Peking University(北京大学)

机构由 AI 辅助整理,请以论文原文为准。

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