Tuesday Physics Seminar: Gamma-Ray Bursts

Tuesday, February 26, 2019 The event started -85 days ago

2:50 PM 3:50 PM

Optics Building

Room 234

GRBs/CBC/FRBs: A Tale of Three Transients

Dr. Bing Zhang (University of Nevada Las Vegas)

I will discuss three exciting fields in transient astrophysics: gamma-ray bursts (GRBs), electromagnetic counterparts of compact binary coalescence (CBC) gravitational wave sources, and fast radio bursts (FRBs). I will first summarize the recent progress in constraining jet composition, energy dissipation and radiation mechanism of GRBs with the help of the Fermi GBM data and then discuss the physical implications of the ground-breaking discovery of the GW170817/GRB 170817A association.  Then I will move on to discuss other electromagnetic counterparts of different species of CBC systems, including the theoretical motivation for a magnetar-powered X-ray transient associated with an NS-NS merger and the observational evidence of such transients from the Chandra Deep Field South archival data. Finally, I will briefly discuss another type of mysterious cosmological transients named FRBs, and some possible ideas of interpreting them. Based on a comparison between the FRB and GRB fields, I will argue that there could exist non-repeating FRBs of catastrophic origins. Some possible mechanisms for generating FRBs from CBC systems will be outlined. 


Details

Category
Conference/Lecture
department
College of Science, Physics and Astronomy
Audience
Public, Students, Faculty and Staff, Alumni

Contact

Ming Sun This email address is being protected from spambots. You need JavaScript enabled to view it.

Venue

Optics Building

John Wright Blvd.Huntsville, AL 35899

More Dates

  SHARE