A THEORY OF PHOTOSPHERIC EMISSION FROM RELATIVISTIC OUTFLOWS

2011/10/31 by R. Ruffini, I. A. Siutsou, G. V. Vereshchagin
Physics and Astronomy · #Astro and Planetary Science #Astronomy and Astrophysical Research #Gamma-ray bursts and supernovae #Optical depth #Outflow #Photon #Photosphere #RADIUS #Spectral line #Thermal #astro-ph.CO

paper · pdf · doi:10.1088/0004-637x/772/1/11

published as ApJ, 772 (2013) 11 · Revision of the previous version, new effect is discussed. Conclusions remain unchanged

arxiv created 2012/06/25 · openalex publication_date 2013/06/28 · arxiv updated 2013/07/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06

Abstract

We derive the optical depth and photospheric radius of relativistic outflows using a model of a relativistic wind with a finite duration. We also discuss the role of radiative diffusion in such an outflow. We numerically solve the radiative transfer equation and obtain light curves and observed spectra of the photospheric emission. The spectra we obtain are nonthermal and in some cases have Band shapes.

Citations

• Pure and Loaded Fireballs in Soft Gamma‐Ray Repeater Giant Flares
• Photosphere-internal shock model of gamma-ray bursts: case studies of Fermi/LAT bursts
• Dissipative Photosphere Models of Gamma‐Ray Bursts and X‐Ray Flashes
• Appearance of Relativistically Expanding Radio Sources
• Theoretical Interpretation of the Luminosity and Spectral Properties of GRB 031203
• Twenty Years of Timing SS 433
• Exact versus Approximate Equitemporal Surfaces in Gamma-Ray Burst Afterglows
• The elementary spike produced by a pure e+e-pair-electromagnetic pulse from a Black Hole: The PEM Pulse
• Thermalization of Nonequilibrium Electron-Positron-Photon Plasmas