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A tidal disruption event from an intermediate-mass black hole revealed by comprehensive multi-wavelength observations.

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Název:	A tidal disruption event from an intermediate-mass black hole revealed by comprehensive multi-wavelength observations.
Autoři:	Wang J; Department of Astronomy, University of Science and Technology of China, Hefei, China. jialaiwang@mail.ustc.edu.cn.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China. jialaiwang@mail.ustc.edu.cn., Huang M; Department of Astronomy, University of Science and Technology of China, Hefei, China.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China., Xue Y; Department of Astronomy, University of Science and Technology of China, Hefei, China. xuey@ustc.edu.cn.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China. xuey@ustc.edu.cn., Jiang N; Department of Astronomy, University of Science and Technology of China, Hefei, China. jnac@ustc.edu.cn.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China. jnac@ustc.edu.cn., Huang S; Department of Astronomy, University of Science and Technology of China, Hefei, China.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China., Wang Y; Department of Astronomy, University of Science and Technology of China, Hefei, China.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China., Zhu J; Department of Astronomy, University of Science and Technology of China, Hefei, China.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China., Zhu S; Department of Astronomy, University of Science and Technology of China, Hefei, China.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China., Dai L; Department of Physics, The University of Hong Kong, Hong Kong, China., Jin C; National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China.; School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, China.; Institute for Frontier in Astronomy and Astrophysics, Beijing Normal University, Beijing, China., Luo B; School of Astronomy and Space Science, Nanjing University, Nanjing, China.; Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing, China., Shu X; Department of Physics, Anhui Normal University, Wuhu, Anhui, China., Sun M; Department of Astronomy, Xiamen University, Xiamen, Fujian, China., Wang T; Department of Astronomy, University of Science and Technology of China, Hefei, China.; School of Astronomy and Space Science, University of Science and Technology of China, Hefei, China., Zou F; Department of Astronomy, University of Michigan, Ann Arbor, MI, USA.
Zdroj:	Nature communications [Nat Commun] 2026 Jan 24. Date of Electronic Publication: 2026 Jan 24.
Publication Model:	Ahead of Print
Způsob vydávání:	Journal Article
Jazyk:	English
Informace o časopise:	Publisher: Nature Pub. Group Country of Publication: England NLM ID: 101528555 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2041-1723 (Electronic) Linking ISSN: 20411723 NLM ISO Abbreviation: Nat Commun Subsets: MEDLINE
Imprint Name(s):	Original Publication: [London] : Nature Pub. Group
Abstrakt:	Tidal disruption events (TDEs) occur when a star crosses the tidal radius of a black hole (BH) and is ripped apart, providing a powerful way to probe dormant BHs over a wide mass range. In this study, we present our late-time observations and comprehensive multi-wavelength analyses of AT 2018cqh, a TDE at the center of a dwarf galaxy that exhibited successive flares in the optical, X-ray, and radio bands. We discovered an unexpected high-state X-ray plateau phase following the peak until the present time. Along with its reported prolonged rise lasting at least 550 days, these unique characteristics are consistent with the scenario of a TDE caused by an intermediate-mass black hole (IMBH) with a mass of approximately (1 - 6) × 10 ⁵ solar masses. Furthermore, scaling relations derived from the host-galaxy properties indicated a similar BH mass in concert. This discovery highlights the invaluable role of TDEs in the search for elusive IMBHs. (© 2026. The Author(s).)
Competing Interests:	Competing interests: The authors declare no competing interests.
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Grant Information:	12393814 National Natural Science Foundation of China (National Science Foundation of China); 12025303 National Natural Science Foundation of China (National Science Foundation of China); XDB0550300 Chinese Academy of Sciences (CAS); 2023YFA1608100 Ministry of Science and Technology of the People's Republic of China (Chinese Ministry of Science and Technology)
Entry Date(s):	Date Created: 20260124 Latest Revision: 20260124
Update Code:	20260125
DOI:	10.1038/s41467-026-68670-3
PMID:	41580404
Databáze:	MEDLINE

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Abstrakt:	Tidal disruption events (TDEs) occur when a star crosses the tidal radius of a black hole (BH) and is ripped apart, providing a powerful way to probe dormant BHs over a wide mass range. In this study, we present our late-time observations and comprehensive multi-wavelength analyses of AT 2018cqh, a TDE at the center of a dwarf galaxy that exhibited successive flares in the optical, X-ray, and radio bands. We discovered an unexpected high-state X-ray plateau phase following the peak until the present time. Along with its reported prolonged rise lasting at least 550 days, these unique characteristics are consistent with the scenario of a TDE caused by an intermediate-mass black hole (IMBH) with a mass of approximately (1 - 6) × 10 <sup>5</sup> solar masses. Furthermore, scaling relations derived from the host-galaxy properties indicated a similar BH mass in concert. This discovery highlights the invaluable role of TDEs in the search for elusive IMBHs.<br /> (© 2026. The Author(s).)
ISSN:	2041-1723
DOI:	10.1038/s41467-026-68670-3