Photospheric Emission From Variable Engine Gamma Ray Burst Simulations

Abstract

By coupling radiation transfer calculations to hydrodynamic simulations, there have been major advancements in understanding the long Gamma Ray Burst (LGRB) prompt emission. Building upon these achievements, we present an analysis of photospheric emission acquired by using the Monte Carlo Radiation Transfer (MCRaT) code on hydrodynamic simulations with variable jet profiles. MCRaT propagates and Compton scatters individual photons that have been injected into the collimated outflow in order to produce synthetic light curves and spectra. These light curves and spectra allow us to compare our results to LGRB observational data. We find excellent agreement between our fitted time resolved $\beta$ parameters and those that are observed. Additionally, our simulations show that photospheric emission, under certain conditions, is able to create the observationally expected Band $\alpha$ parameter. Finally, we show that the simulations are consistent with the Golenetskii correlation but exhibit some strain with the Amati and Yonetoku correlations.

10 pages, 8 figures, this version is the final accepted manuscript to appear in ApJ

References in corpus (10)

• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
• Temporal Evolution Of Thermal Emission From Relativistically Expanding Plasma
• Very high efficiency photospheric emission in long duration gamma-ray bursts
• A Comprehensive Analysis of Fermi Gamma-ray Burst Data: II. $E_{\mathrm{p}}$-Evolution Patterns and Implications for the Observed Spectrum-Luminosity Relations
• Monte-Carlo simulations of relativistic radiation mediated shocks: I. photon rich regime
• Photospheric emission from long duration gamma-ray bursts powered by variable engines
• Gamma-ray burst spectra and spectral correlations from sub-photospheric Comptonization
• Cosmological Constraints from calibrated Yonetoku and Amati relation implies Fundamental plane of Gamma-ray bursts
• A Monte Carlo Radiation Transfer Study of Photospheric Emission in Gamma Ray Bursts

Cited by in corpus (19)

• Multi-Messenger Astrophysics
• The electromagnetic counterparts of compact binary mergers
• Physics of radiation mediated shocks and its applications to GRBs, supernovae, and neutron star mergers
• The photospheric origin of the Yonetoku relation in gamma-ray bursts
• High efficiency photospheric emission entailed by formation of a collimation shock in gamma-ray bursts
• Intermittent hydrodynamic jets in collapsars do not produce GRBs
• Synchrotron radiation in $\gamma$-ray burst prompt emission
• A global numerical model of the prompt emission in short gamma-ray bursts
• Photospheric Polarization Signatures From Long Gamma Ray Burst Simulations
• Photospheric Prompt Emission From Long Gamma Ray Burst Simulations -- II. Spectropolarimetry
• Time-Reversed Gamma-Ray Burst Light Curve Characteristics as Transitions between Subluminal and Superluminal Motion
• Investigating subphotospheric dissipation in gamma-ray bursts using joint Fermi-Swift observations
• Short duration gamma-ray bursts and their outflows in light of GW170817
• Observational characteristics of radiation-mediated shocks in photospheric gamma-ray burst emission
• Subphotospheric emission from short gamma-ray bursts: Protons mold the multi-messenger signals
• Photospheric Prompt Emission From Long Gamma Ray Burst Simulations -- I. Optical Emission
• Peak energy--Isotropic Luminosity Correlation and Jet Opening Angle Evolution in Swift-BAT Short GRBs with Soft Tail Emission
• Modeling of the Gamma Ray Burst photospheric emission: Monte Carlo simulation of the GRB prompt emission, numerical results and discussion
• Black hole to photosphere: 3D GRMHD simulations of collapsars reveal wobbling and hybrid composition jets