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arXiv 2402.04861astro-ph.GAastro-ph.HE
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宽线活动星系核SDSS J1605中具有双峰宽H$\beta$线的中心潮汐瓦解事件候选体

A candidate for central tidal disruption event in the broad line AGN SDSS J1605 with double-peaked broad H$β$

XueGuang Zhang

AI总结:

本文在宽线AGN SDSS J1605中发现一个可能的中心潮汐瓦解事件候选体,其双峰宽Hβ线与TDE模型吻合,为在双峰宽线AGN中探测TDE提供线索。

摘要:

在这封信中,受可能与潮汐瓦解事件(TDEs)相关的双峰宽巴耳末发射线的启发,我们在SDSS J160536+134838(=SDSS J1605)中报告了一个潜在的TDE候选体,其红移$z\sim0.44$,具有类星体光谱但带有双峰宽H$\beta$线。长期的CSS光变曲线可以自然地由一颗质量为$2.82_{-0.19}^{+0.20}{\rm M_\odot}$的主序星被SDSS J1605中心黑洞(质量为$144_{-21}^{+26}\times10^6{\rm M_\odot}$)瓦解来描述。同时,其后的ASAS-SN光变曲线未显示明显的趋势性变化,表明SDSS J1605中明亮的CSS耀发是独特的,且与正常活动星系核(AGN)的变异性不同。此外,TDE模型确定的碎片尺寸与吸积盘模型描述的双峰宽H$\beta$线发射区尺寸之间存在一致性,支持盘状宽线区(BLRs)可能与SDSS J1605中的中心TDE相关。而维里黑洞质量比TDE模型确定的值高约7倍,这可以通过R-L关系确定的BLRs尺寸远大于SDSS J1605中与TDE碎片相关的发射区实际距离来自然解释。尽管对于双峰宽线是否绝对与TDEs相关尚无明确结论,但本文的结果为在具有双峰宽线的AGN中探测潜在TDEs提供了线索。

英文摘要:

In this letter, motivated by double-peaked broad Balmer emission lines probably related to tidal disruption events (TDEs), a potential TDE candidate is reported in SDSS J160536+134838 (=SDSS J1605) at $z\sim0.44$ having quasar-like spectrum but with double-peaked broad H$β$. The long-term CSS light curve can be naturally described by a main-sequence star of $2.82_{-0.19}^{+0.20}{\rm M_\odot}$ disrupted by the central black hole (BH) of $144_{-21}^{+26}\times10^6{\rm M_\odot}$ in SDSS J1605. Meanwhile, the ASAS-SN light curves afterwards show none apparent trend variability, indicating the bright CSS flare in SDSS J1605 unique and different enough from variability of normal AGN. Furthermore, there is a consistency between the TDE model determined sizes of debris with the sizes of emission regions for the double-peaked broad H$β$ described by the accretion disk model, supporting the disk-like BLRs probably related to a central TDE in SDSS J1605. And the virial BH mass $\sim$7 times higher than the TDE model determined value can be naturally explained by R-L relation determined BLRs sizes very larger than the actual distance of emission regions related to TDEs debris in SDSS J1605. Although no clear conclusion on double-peaked broad lines absolutely related to TDEs, the results here provide clues to detect potential TDEs in AGN with double-peaked broad lines.

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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