Date: Wednesday 05-Oct-2022
Time: 11:30-12:30 pm
Location: PSC 1136
Speaker: Kavitha Arur (Georgia Institute of Technology)
Title: "Using the bispectrum to understand rapid X-ray variability from black hole binaries"
Quasi-periodic oscillations (QPOs) observed from X-ray binaries are a signature of rapid X-ray variability and a powerful diagnostic tool to study the regions closest to the central compact object. However, the physical origin of these QPOs is still under debate. One way to break degeneracies between the different models that have been proposed is to go beyond the simple power spectrum, and use higher order time series analysis techniques. One such technique is the bispectrum, and the closely related bicoherence; which is a measure of the strength of phase coupling among triplets of frequencies. In this talk, I will summarize the results obtained from applying such analysis to X-ray binaries and how these can be used to probe the geometry of the region close to black holes.
Guidelines and format for the CTC Lunch seminars.
Past CTC Lunch seminars.
For other questions, contact the CTC Lunch host: Shmuel Bialy
SPECIAL ACCOMMODATIONS:
Special accommodations for individuals with disabilities can be made by calling (301) 405-3001. It would be appreciated if we are notified at least one week in advance.
