[2025-01-18] For better promotion of the events, the categories in this system will be adjusted. For details, please refer to the announcement of this system. The link is https://indico-tdli.sjtu.edu.cn/news/1-warm-reminder-on-adjusting-indico-tdli-categories-indico

Oct 15 – 18, 2024
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Detecting and characterizing the X-ray quasi-periodicity from candidate IMBH TDEs

Oct 16, 2024, 11:20 AM
15m
Tsung-Dao Lee Institute

Tsung-Dao Lee Institute

No.1 Lisuo Road, Pudong New Area, Shanghai, China
Contribution talk Session

Speaker

Xinwen Shu (Anhui Normal University)

Description

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 (10^6-10^10Msun). Many candidates have been proposed including the black holes in dwarf galaxies, globular clusters, and hyperluminous off-nuclear X-ray sources. Until recently, the bright flares from tidal disruption events (TDEs) provide a new and direct way to probe IMBHs. In this talk, we will report our search for the X-ray quasi-periodicity oscillation signal from IMBH TDEs, and the discovery of a transient X-ray QPO with a period of ~85 second (at a significance of >3.5 sigma). 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 [9.910^3-1.610^4Msun] and [0.26-0.36], respectively. This result supports the presence of an IMBH with a low spin, and may open up the possibility of studying IMBHs through X-ray timing of TDEs, such as EP.

Primary author

Xinwen Shu (Anhui Normal University)

Co-author

Dr Wenjie Zhang (NAOC)

Presentation materials

There are no materials yet.