[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

EMRI+TDE=QPE: Star-Disc Interaction and Quasi-Periodic Eruptions

Oct 15, 2024, 4:20 PM
25m
Tsung-Dao Lee Institute

Tsung-Dao Lee Institute

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

Speaker

Itai Linial (Columbia University/Institute for Advanced Study)

Description

Quasi-periodic eruptions (QPEs) are an emerging class of high amplitude bursts of X-ray radiation, repeating on a hours-day timescale, recently discovered near the central supermassive black holes (SMBHs) of a few low-mass galaxies. I will briefly review our current theoretical understanding of QPEs, and the different classes of proposed theoretical interpretations. I will focus on a scenario involving a main-sequence star repeatedly colliding with an accretion flow onto the SMBH, twice per orbit. I will show how this model naturally reproduces the observed period, luminosity, emission temperature, duration, occurrence rate of QPEs, as well as the possible association between TDEs and QPEs. I will also discuss the implications of the observations and of our model for probing the accretion physics around SMBHs, the rate of extreme mass ratio inspirals (EMRIs) for future space-based gravitational wave detectors, and the discovery prospects of related repeating nuclear transients in light of upcoming UV surveys such as ULTRASAT and UVEX.

Primary author

Itai Linial (Columbia University/Institute for Advanced Study)

Presentation materials

There are no materials yet.