Thermal Radiation From Gamma-Ray Burst Jets

Mizuta, Akira; Nagataki, Shigehiro; Aoi, Junichi

doi:10.1088/0004-637x/732/1/26

Cited by 83 publications

(92 citation statements)

References 44 publications

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“…the radius at which the interaction between matter and radiation ceases. Early results based on spectrum decoupling at τ T = 1 yielded a quantitative disagreement between simulations results and observations 14,16,19 . It was subsequently understood that the decoupling happens at higher optical depths due to the inefficiency of the exchange of energy via Compton scattering 10 .…”

Section: Introductionmentioning

confidence: 93%

“…The spectral shape can be modified by dissipation in the trans-photospheric region, but the spectral peak is unaffected. 13,14,[16][17][18][19] relaxing the one emission zone approximation customarily made in synchrotron studies. In this paper we review recent results of numerical studies of the photospheric emission in long duration GRBs, focusing on ensemble properties such as the Amati 1 , Golenetskii 11 , and Luminosity-Lorentz-factor 8 correlations.…”

Section: Introductionmentioning

confidence: 99%

“…The coupling is efficient out to a certain radius, at which the radiation and matter decouple. In first approximation the radiation spectrum can be assumed to be in equilibrium out to such radius and completely decoupled afterwards 14,19 . While energy dissipation in the trans-photospheric region (0.1 < τ T < 10) can modify the spectral shape, adding non-thermal tails to the spectrum, energy consideration suggest that they should not modify the peak frequency of the emission 14,16 .…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulations of the photospheric emission in long-duration gamma-ray bursts

Lazzati¹,

Chhotray²,

López-Cámara³

et al. 2017

The Fourteenth Marcel Grossmann Meeting

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Photospheric emission is an unavoidable component of the prompt emission of gammaray bursts. Its magnitude and spectral shape are, however, uncertain and depend on jet properties such as its magnetization and the dissipation mechanism and location. Some models call for a dominant role of photospheric emission in the prompt spectrum, while others only contain a small photospheric contribution. We present a review of numerical results on the properties of the photospheric emission in long-duration gammaray bursts, discussing the role of the photospheric component in the explanation of ensemble correlations and the origin of its non-thermal appearance.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical simulations of the photospheric emission in long-duration gamma-ray bursts

Lazzati¹,

Chhotray²,

López-Cámara³

et al. 2017

The Fourteenth Marcel Grossmann Meeting

View full text Add to dashboard Cite

show abstract

“…173,174 Equally important is the fact that the predicted spectra of this model are only weakly sensitive to many of the uncertainties, such as the unknown outflow magnetization, etc. This was investigated numerically by several authors for different dynamical models, 116,[175][176][177] as well as magnetization parameter. 178 Third, by slight modification of a single parameter -the optical depth in which the dissipation (or most of it) takes place, the emerging spectra can have very different shapes (see Figures 8, 9, taken from 179 ).…”

mentioning

confidence: 99%

“…Most of the radiated energy is already in the form of thermal photons, and the dissipated energy acts to re-distribute them. Due to these advantages, this model attracted a lot of attention in recent years [e.g., 114,116,128,130,145,157,160,161,163,165,173,176,[181][182][183][184][185][186][187] ].…”

mentioning

confidence: 99%

Photospheric emission in gamma-ray bursts

Pe’er

Ryde

2017

Int. J. Mod. Phys. D

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A major breakthrough in our understanding of gamma-ray bursts (GRB) prompt emission physics occurred in the last few years, with the realization that a thermal component accompanies the over-all non-thermal prompt spectra. This thermal part is important by itself, as it provides direct probe of the physics in the innermost outflow regions. It further has an indirect importance, as a source of seed photons for inverse-Compton scattering, thereby it contributs to the non-thermal part as well. In this short review, we highlight some key recent developments. Observationally, although so far it was clearly identified only in a minority of bursts, there are indirect evidence that thermal component exists in a very large fraction of GRBs, possibly close to 100%. Theoretically, the existence of thermal component have a large number of implications as a probe of underlying GRB physics. Some surprising implications include its use as a probe of the jet dynamics, geometry and magnetization.

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Grid-based Methods in Relativistic Hydrodynamics and Magnetohydrodynamics

Martí

Müller

2015

Living Rev Comput Astrophys

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An overview of grid-based numerical methods used in relativistic hydrodynamics (RHD) and magnetohydrodynamics (RMHD) is presented. Special emphasis is put on a comprehensive review of the application of high-resolution shock-capturing methods. Results of a set of demanding test bench simulations obtained with different numerical methods are compared in an attempt to assess the present capabilities and limits of the various numerical strategies. Applications to three astrophysical phenomena are briefly discussed to motivate the need for and to demonstrate the success of RHD and RMHD simulations in their understanding. The review further provides FORTRAN programs to compute the exact solution of the Riemann problem in RMHD, and to simulate 1D RMHD flows in Cartesian coordinates. Article RevisionsLiving Reviews supports two ways of keeping its articles up-to-date:Fast-track revision. A fast-track revision provides the author with the opportunity to add short notices of current research results, trends and developments, or important publications to the article. A fast-track revision is refereed by the responsible subject editor. If an article has undergone a fast-track revision, a summary of changes will be listed here.Major update. A major update will include substantial changes and additions and is subject to full external refereeing. It is published with a new publication number.For detailed documentation of an article's evolution, please refer to the history document of the article's online version at http://dx

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Thermal Radiation From Gamma-Ray Burst Jets

Cited by 83 publications

References 44 publications

Numerical simulations of the photospheric emission in long-duration gamma-ray bursts

Numerical simulations of the photospheric emission in long-duration gamma-ray bursts

Photospheric emission in gamma-ray bursts

Grid-based Methods in Relativistic Hydrodynamics and Magnetohydrodynamics

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