“X射线天文学60周年及中国X射线天文研究”研讨会：时域与多信使天文学时代的X射线天文研究

Session

Session IV

17 Jun 2022, 15:45

Conveners

Session IV

• Chair: 袁为民 ()

Contribution list Timetable

36. Recent developments in tidal disruption events theory

Lixin Dai (The University of Hong Kong)

17/06/2022, 15:45

A tidal disruption event happens when a star wanders too close to the massive black hole in the center of a galaxy and gets tidally disrupted. The collision and accretion of the stellar debris powers a bright, transient flare. Tidal disruption events provide a unique opportunity to probe quiescent massive black holes and stellar dynamics in centers of distant galaxies, as well as to study the...

89. The accretion disk and X-ray radiation in TDE

刘富坤

17/06/2022, 16:10

26. Two tales of X-ray QPEs and the discovery of a Compton echo in TDE

舒新文 (Anhui Normal University)

17/06/2022, 16:25

X-ray quasi-periodic eruptions (QPEs) are a recently discovered phenomenon associated with supermassive black holes at the centers of galaxies. They are high-amplitude soft X-ray flares that recur on timescales of hours, but what causes these flares remains uncertain. In this talk, I will review the history in discovering the QPE phenomenon and its possible origins, especially the difference...

47. Highly Variable X-ray Sources and Tidal Disruption Events in the XMM-Newton SLew survey

李东悦 (NAOC)

17/06/2022, 16:40

By comparing with the fluxes (and upper limits) given in RASS, we have constructed a highly variable source sample, comprising 265 sources (2.5 per cent) selected from the XMMSL2 clean catalogue. These source displayed X-ray variability of a factor of more than 10 in 0.2--2\,keV compared to the RASS. Of the sample sources, 94.3 per cent are identified. The identification procedure follows a...

14. Discovery of ATLAS17jrp as an Optical, X-ray and Infrared Bright TDE in a Star-forming Galaxy

王义博 (USTC)

17/06/2022, 16:55

We hereby report the discovery of ATLAS17jrp as an extraordinary TDE in star-forming galaxy SDSSJ162034.99+240726.5 in our recent sample of mid-infrared outbursts in nearby galaxies. Its optical/UV light curves rise to a peak luminosity $\sim1.06\times10^{44}\rm\,erg\,s^{-1}$ in about a month and then decay as $\rm t^{-5/3}$ with a roughly constant temperature around 19000~K, and the optical...

24. Searching for Quasi-periodic Oscillations in Active Galactic Nuclei of the Chandra Deep Field South

鲍通 (Nanjing University)

17/06/2022, 17:10

Recent X-ray observations have revealed growing evidence of quasi-periodic oscillation (QPO) in the light curve of active galactic nuclei (AGNs), which may serve as a useful probe of black hole physics. In this work, we present a systematic search for X-ray QPOs among $\sim$ 1000 AGNs of the Chandra Deep Field South (CDF-S) in a homogeneous fashion. Dividing the 7-Ms Chandra observations...