Are GRBs the same at high and low redshift?
O. M. Littlejohns, N. R. Tanvir, R. Willingale, P. T. O'Brien, P. A., Evans, A. J. Levan
TL;DR
This paper investigates whether high-redshift gamma-ray bursts differ from low-redshift ones by simulating their light curves across redshifts, revealing complex evolution in their prompt emission properties.
Contribution
It introduces a simulation-based approach to compare high and low redshift GRBs, highlighting potential differences in their prompt emission characteristics.
Findings
Simulated light curves show evolution in T90 with redshift
High redshift GRBs may have distinct prompt emission features
Complex evolution suggests differences in GRB properties over cosmic time
Abstract
Due to their highly luminous nature, gamma-ray bursts (GRBs) are useful tools in studying the early Universe (up to z = 10). We consider whether the available subset of Swift high redshift GRBs are unusual when compared to analogous simulations of a bright low redshift sample. By simulating data from the Burst Alert Telescope (BAT; Barthelmy et al. 2005) the light curves of these bright bursts are obtained over an extensive range of redshifts, revealing complicated evolution in properties of the prompt emission such as T90.
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Taxonomy
TopicsGamma-ray bursts and supernovae · Astronomy and Astrophysical Research