Year-end Sale % OFF 
Abstract
I review how polarization signals have been discussed in the research field of Gamma-Ray Bursts (GRBs). I mainly discuss two subjects in which polarimetry enables us to study the nature of relativistic jets. (1) Jet breaks: Gamma-ray bursts are produced in ultra-relativistic jets. Due to the relativistic beaming effect, the emission can be modeled in a spherical model at early times. However, as the jet gradually slows down, we begin to see the edge of the jet together with polarized signals at some point. (2) Optical flash: later time afterglow is known to be insensitive to the properties of the original ejecta from the GRB central engine. However, a short-lived, reverse shock emission would enable us to study the nature of of GRB jets. I also briefly discuss the recent detection of optical circular polarization in GRB afterglow.
Highlights
Gamma-ray bursts (GRBs) are the brightest objects in the universe, produced by the deceleration> 100
I have briefly reviewed how polarization signals had been discussed in GRB studies
We can see only a small portion of GRB jets at early times due to the relativistic beaming effect, as the outflow decelerates, a larger region becomes visible at later times for the observer
Summary
Gamma-ray bursts (GRBs) are the brightest objects in the universe, produced by the deceleration. Mergers of binary compact stellar objects such as neutron stars and black holes (BHs) are the possible progenitors [1,2]. In both cases accretion onto a compact object is likely to power the relativistic outflow and the same physical processes are involved. Relativistic outflows and possibly magnetic acceleration are features that GRBs and active galactic nuclei (AGN) have in common. A “flying pancake” is a better description for GRB jets [3] Another unique feature of GRB jets is the size of the visible region which is much smaller than the jet opening angle θ j. The relativistic beaming effect plays an important role when the polarization signals are discussed below
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
