Constraining Anisotropic Lorentz Violation via the Spectral-lag Transition of GRB 160625B

DOI: 
10.3847/1538-4357/aa7630
Publication date: 
11/07/2017
Main author: 
Wei J.-J.
IAA authors: 
Zhang, B.-B.
Authors: 
Wei J.-J., Wu X.-F., Zhang B.-B., Shao L., Mészáros P., Kostelecký V.A.
Journal: 
Astrophysical Journal
Publication type: 
Article
Volume: 
842
Number: 
115
Abstract: 

Violations of Lorentz invariance can lead to an energy-dependent vacuum dispersion of light, which results in arrival-time differences of photons with different energies arising from a given transient source. In this work, direction-dependent dispersion constraints are obtained on nonbirefringent Lorentz-violating effects using the observed spectral lags of the gamma-ray burst GRB 160625B. This burst has unusually large high-energy photon statistics, so we can obtain constraints from the true spectral time lags of bunches of high-energy photons rather than from the rough time lag of a single highest-energy photon. Also, GRB 160625B is the only burst to date having a well-defined transition from positive lags to negative lags, providing a unique opportunity to distinguish Lorentz-violating effects from any source-intrinsic time lag in the emission of photons of different energy bands. Our results place comparatively robust two-sided constraints on a variety of isotropic and anisotropic coefficients for Lorentz violation, including the first bounds on Lorentz-violating effects from operators of mass dimension 10 in the photon sector. © 2017. The American Astronomical Society. All rights reserved.

Database: 
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021340159&doi=10.3847%2f1538-4357%2faa7630&partnerID=40&md5=4b7956c910acfa8f8aefddb0c2f75aff
Keywords: 
astroparticle physics; gamma-ray burst: individual (GRB 160625B); gravitation