A complete reference of the analytical synchrotron external shock models of gamma-ray bursts
By He Gao, W. Lei, Y. Zou, Xuefeng Wu, Bing Zhang. 2013
206 citations recorded by the source corpus.
Gamma-ray bursts are most luminous explosions in the universe. Their ejecta are believed to move towards Earth with a relativistic speed. The interaction between this "relativistic jet" and a circumburst medium drives a pair of (forward and reverse) shocks. The electrons accelerated in these shocks radiate synchrotron emission to power the broad-band afterglow of GRBs. The external shock theory is an elegant theory, since it invokes a limit number of model parameters, and has well predicted spectral and temporal properties. On the other hand, depending on many factors (e.g. the energy content, ambient density profile, collimation of the ejecta, forward vs. reverse shock dynamics, and synchrotron spectral regimes), there is a wide variety of the models. These models have distinct predictions on the afterglow decaying indices, the spectral indices, and the relations between them (the so-called "closure relations"), which have been widely used to interpret the rich multi-wavelength afterglow observations. This review article provides a complete reference of all the analytical synchrotron external shock afterglow models by deriving the temporal and spectral indices of all the models in all spectral regimes, including some regimes that have not been published before. The review article is designated to serve as a useful tool for afterglow observers to quickly identify relevant models to interpret their data. The limitations of the analytical models are reviewed, with a list of situations summarized when numerical treatments are needed. (C) 2013 Elsevier B.V. All rights reserved.
Subfields: Astronomy and Astrophysics
View Paper: https://www.semanticscholar.org/paper/89f510185d9152dd6217490731fe0b984c671160
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In Astronomy and Astrophysics
Citations in the corpus
- Gamma-Ray Burst Afterglows in the Multimessenger Era: Numerical Models and Closure Relations (2019, background): “A review and comprehensive collection of known GRB afterglow phases and closure relations is given in Gao et al. (2013).”
- THE MILLISECOND MAGNETAR CENTRAL ENGINE IN SHORT GRBs (2015, methodology): “Using the spectral and temporal information of the X-ray data, we can diagnose the spectral regime of the afterglow based on the closure relations (e.g. Zhang & Mészáros 2004; see Gao et al. 2013a for a complete review).”
- The physics of gamma-ray bursts & relativistic jets (2014, background): “…early X-ray afterglow due to internal dissipation of a proto-magnetar wind (Zhang, 2013), bright broadband afterglow of a magnetar-powered ejecta (Gao et al., 2013a), as well as a merger-nova brighter than the “kilo-nova” predicted for a black hole central engine (Yu et al., 2013; Metzger and…”
- A POSSIBLE CONNECTION BETWEEN FAST RADIO BURSTS AND GAMMA-RAY BURSTS (2013, methodology): “This can happen both in massive star core collapses (Troja et al. 2007) and NS-NS mergers (Zhang 2013; Gao et al. 2013a; Yu et al. 2013).”
- A Decade of Gamma-Ray Bursts Observed by Fermi-LAT: The Second GRB Catalog (2019, methodology): “According to the model, a power-law distribution of electrons radiates synchrotron emission, and the spectrum and corresponding light curve are described as a series of broken power laws (e.g. Sari et al. 1998; Chevalier & Li 2000; Zhang et al. 2006; Gao et al. 2013).”