A Unified Model of the Prompt Optical Emission of Gamma-Ray Bursts
arXiv:astro-ph/0701603 · doi:10.1086/516839
Abstract
The observational diversity of optical emission, which coincides with prompt gamma-ray bursts (GRBs), has been discovered in the recent Swift era. We show that on the assumption of the synchrotron radiation for the observed energy range below the X-ray band, the observed diversity can be explained using the internal shock model by taking into account a high-latitude emission and the spectral change due to the synchrotron self-absorption. It may even be possible in our model to include bright optical flashes found, e.g., in GRB~990123. The prediction of our model is that the spectral index in the optical band is dependent on whether the optical light curve correlates with those in the X-rays and/or gamma-rays or not, which will be tested in the near future.
arXiv comment9 pages, 1 figure
References in corpus (31)
- Spectra and Light Curves of Gamma-Ray Burst Afterglows
- Physical processes shaping GRB X-ray afterglow lightcurves: theoretical implications from the Swift XRT observations
- Evidence for a Canonical GRB Afterglow Light Curve in the Swift/XRT Data
- Observation of contemporaneous optical radiation from a gamma-ray burst
- Predictions for The Very Early Afterglow and The Optical Flash
- Afterglow Emission from Naked Gamma-Ray Bursts
- The early X-ray emission from GRBs
- Gamma-Ray Bursts in the Swift Era
- Gamma-ray burst early optical afterglows: implications for the initial Lorentz factor and the central engine
- GRB 990123: Reverse and Internal Shock Flashes and Late Afterglow
- Testing the Curvature Effect and Internal Origin of Gamma-Ray Burst Prompt Emissions and X-ray Flares with Swift Data
- A Link between Prompt Optical and Prompt Gamma-Ray Emission in Gamma-Ray Bursts
- Energy input and response from prompt and early optical afterglow emission in gamma-ray bursts
- Observations of GRB 990123 by the Compton Gamma-Ray Observatory
- Early Afterglow Emission from a Reverse Shock as a Diagnostic Tool for GRB Outflows
- Gamma-Ray Bursts from Up-Scattered Self-Absorbed Synchrotron Emission
- A Unified Model of Short and Long Gamma-Ray Bursts, X-Ray Rich Gamma-Ray Bursts, and X-Ray Flashes
- Very Early Optical Afterglows of Gamma-Ray Bursts: Evidence for Relative Paucity of Detection
- "Anomalous" Optical GRB Afterglows are Common: Two z~4 Bursts, GRB 060206 and 060210
- The Anomalous Early Afterglow of GRB 050801
- Continuous optical monitoring during the prompt emission of GRB 060111B
- Early optical-IR emission from GRB 041219a: neutron-rich internal shocks and a mildly magnetized external reverse shock
- Ep-Eiso Correlation in a Multiple Subjet Model of Gamma-Ray Bursts
- Tail Emission of Prompt Gamma-Ray Burst Jets
- Intrinsic Parameters of GRB990123 from Its Prompt Optical Flash and Afterglow
- Reverse Shock Emission as a Probe of GRB Ejecta
- Is GRB 050904 a super-long burst?
- The GRB early optical flashes from internal shocks: application to GRB990123, GRB041219a and GRB060111b
- The Ultraviolet flash accompanying GRBs from neutron-rich internal shocks
- Prompt Ultraviolet-to-Soft-X-Ray Emission of Gamma-Ray Bursts: Application to GRB 031203?
- A Possible Origin of Bimodal Distribution of Gamma-Ray Bursts