Photospheric Emission From Collapsar Jets in 3d Relativistic Hydrodynamics

Ito, Hirotaka; Matsumoto, Jin; Nagataki, Shigehiro; Warren, Donald C.; Barkov, Maxim V.

doi:10.1088/2041-8205/814/2/l29

Cited by 63 publications

(88 citation statements)

References 40 publications

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“…therefore poorly resolved. Still, this resolution is about an order of magnitude better than in the simulations of Ito et al (2015). As we discuss below, limited resolution is a serious concern for these results and an increase by at least an order of magnitude is required to ensure that shocks are resolved and that the simulations capture the temperature variations that they produce.…”

Section: Resultsmentioning

confidence: 95%

“…In this paper we present the results of a first step towards merging the two worlds and performing detailed radiation transfer calculations on the complex dynamics of a relativistic jet from high-resolution multidimensional numerical simulations (analogous to the recent work by Ito et al 2015). In Section 2 we present Lazzati the Monte Carlo Radiation Transfer (MCRaT) code and the results of several validation tests.…”

Section: Introductionmentioning

confidence: 99%

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Monte Carlo Radiation Transfer Simulations of Photospheric Emission in Long-Duration Gamma-Ray Bursts

Lazzati

2016

ApJ

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We present MCRaT, a Monte Carlo Radiation Transfer code for self-consistently computing the light curves and spectra of the photospheric emission from relativistic, unmagnetized jets. We apply MCRaT to a relativistic hydrodynamic simulation of a long duration gamma-ray burst jet, and present the resulting light-curves and time-dependent spectra for observers at various angles from the jet axis. We compare our results to observational results and find that photospheric emission is a viable model to explain the prompt phase of long-duration gamma-ray bursts at the peak frequency and above, but faces challenges in reproducing the flat spectrum below the peak frequency. We finally discuss possible limitations of these results both in terms of the hydrodynamics and the radiation transfer and how these limitations could affect the conclusions that we present.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Monte Carlo Radiation Transfer Simulations of Photospheric Emission in Long-Duration Gamma-Ray Bursts

Lazzati

2016

ApJ

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“…More realistic numerical models that consider outflow instabilities due to the interaction of the jet with the stellar envelope reveal a much more pronounced effect. 198,199 Furthermore, as will be shortly discussed below, for non-spherical explosion, the effect of the "vague photosphere" on the observed spectrum becomes dramatic.…”

Section: Geometrical Broadeningmentioning

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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“…More realistic numerical models that consider outflow instabilities due to the interaction of the jet with the stellar envelope reveal a much more pronounced effect. 201,202 Furthermore, as will be shortly discussed below, for nonspherical explosion, the effect of the "vague photosphere" on the observed spectrum becomes dramatic.…”

Section: Geometrical Broadeningmentioning

confidence: 99%

Photospheric emission in gamma-ray bursts

Pe’er

Ryde

2017

The Fourteenth Marcel Grossmann Meeting

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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 nonthermal 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 contributes to the nonthermal 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 is indirect evidence that a thermal component exists in a very large fraction of GRBs, possibly close to 100%. Theoretically, the existence of a thermal component has 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.

show abstract

Photospheric Emission From Collapsar Jets in 3d Relativistic Hydrodynamics

Cited by 63 publications

References 40 publications

Monte Carlo Radiation Transfer Simulations of Photospheric Emission in Long-Duration Gamma-Ray Bursts

Monte Carlo Radiation Transfer Simulations of Photospheric Emission in Long-Duration Gamma-Ray Bursts

Photospheric emission in gamma-ray bursts

Photospheric emission in gamma-ray bursts

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