An 85-s X-ray quasi-periodicity after a stellar tidal disruption by a candidate intermediate-mass black hole
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866913715036618752 |
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| author | Zhang, Wenjie Shu, Xinwen Sun, Luming Shen, Rongfeng Dou, Liming Jiang, Ning Wang, Tinggui |
| author_facet | Zhang, Wenjie Shu, Xinwen Sun, Luming Shen, Rongfeng Dou, Liming Jiang, Ning Wang, Tinggui |
| contents | It is still in dispute the existence of intermediate-mass black holes (IMBHs) with a mass of ~10^3-10^5 solar masses (Msun), which are the missing link between stellar-mass black holes (5-50 Msun) and supermassive black holes (10^6-10^10 Msun). The bright flares from tidal disruption events (TDEs) provide a new and direct way to probe IMBHs. 3XMM J215022.4-055108 is a unique off-nuclear X-ray transient which can be best explained as the TDE by an IMBH in a massive star cluster, though its mass is not well determined. Here, we report the discovery of a transient X-ray quasi-periodicity signal from 3XMM J215022.4-055108 with a period of ~85 seconds (at a significance of >3.51sigma) and fractional root-mean-squared amplitude of ~10%. Furthermore, the signal is coherent with a quality factor ~16. The significance drops to >3.13sigma if considering all light curves with sufficient quality for QPO search. Combining with the results from X-ray continuum fittings, the detection of QPO allows for joint constraints on the black hole mass and dimensionless spin in the range [9.9*10^3-1.6*10^4 Msun]$ and [0.26-0.36], respectively. This result supports the presence of an IMBH in an off-nuclear massive star cluster and may open up the possibility of studying IMBHs through X-ray timing of TDEs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01156 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An 85-s X-ray quasi-periodicity after a stellar tidal disruption by a candidate intermediate-mass black hole Zhang, Wenjie Shu, Xinwen Sun, Luming Shen, Rongfeng Dou, Liming Jiang, Ning Wang, Tinggui High Energy Astrophysical Phenomena High Energy Physics - Phenomenology It is still in dispute the existence of intermediate-mass black holes (IMBHs) with a mass of ~10^3-10^5 solar masses (Msun), which are the missing link between stellar-mass black holes (5-50 Msun) and supermassive black holes (10^6-10^10 Msun). The bright flares from tidal disruption events (TDEs) provide a new and direct way to probe IMBHs. 3XMM J215022.4-055108 is a unique off-nuclear X-ray transient which can be best explained as the TDE by an IMBH in a massive star cluster, though its mass is not well determined. Here, we report the discovery of a transient X-ray quasi-periodicity signal from 3XMM J215022.4-055108 with a period of ~85 seconds (at a significance of >3.51sigma) and fractional root-mean-squared amplitude of ~10%. Furthermore, the signal is coherent with a quality factor ~16. The significance drops to >3.13sigma if considering all light curves with sufficient quality for QPO search. Combining with the results from X-ray continuum fittings, the detection of QPO allows for joint constraints on the black hole mass and dimensionless spin in the range [9.9*10^3-1.6*10^4 Msun]$ and [0.26-0.36], respectively. This result supports the presence of an IMBH in an off-nuclear massive star cluster and may open up the possibility of studying IMBHs through X-ray timing of TDEs. |
| title | An 85-s X-ray quasi-periodicity after a stellar tidal disruption by a candidate intermediate-mass black hole |
| topic | High Energy Astrophysical Phenomena High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.01156 |