| Description: | [DPS Seminar] Dr. Arka Chatterjee (University of Manitoba, Winnipeg, Canada) -- Who Paints X-ray Lightcurves and Spectra From Black Holes? |
| Date: | Wednesday, Jan 18, 2023 |
| Time: | 3 p.m. - 4:30 p.m. |
| Venue: | Meghnad Saha Lecture Theatre |
| Details: | Black hole astrophysics grew exponentially with the advent of X-ray astronomy. During accretion onto a black hole, matter experiences an extreme gravitational and thermodynamical environment. Understanding accretion onto black holes relied on the studies of the X-ray lightcurves and spectra collected by the satellites during the past 5 decades. The lightcurves are gathered by satellites where photon counts are stored w.r.t to their energy and time. They often contain Quasi-Periodic Oscillations (QPOs) and exhibit time delays or lags between the energy bands. The X-ray spectrum on the other hand contains energy information and photon counts.In the first part of the presentation, we will address how the major players of accretion shape the light curves from black holes. Then we will uncover how those players modify their broadband X-ray spectra. Finally, we will discuss the major science questions to be addressed with future state-of-the-art proposed X-ray satellites, including Colibrì--Canada’s flagship X-ray telescope for the 2030's. |
| Calendar: | Seminar Calendar (entered by rajni) |