X-Ray and high energy flares from late internal shocks of gamma-ray bursts

Abstract

We study afterglow flares of gamma-ray bursts (GRBs) in the framework of the late internal shock (LIS) model based on a careful description for the dynamics of a pair of shocks generated by a collision between two homogeneous shells,. First, by confronting the model with some fundamental observational features of X-ray flares, we find some constraints on the properties of the pre-collision shells that are directly determined by the central engine of GRBs. Second, high energy emission associated with X-ray flares, which arises from synchrotron self-Compton (SSC) emission of LISs, is investigated in a wide parameter space. The predicted flux of high energy flares may reach as high as $\sim 10^{-8}\mathrm{ergc}{\mathrm{m}}^{-2}{\mathrm{s}}^{-1}$, which is likely to be detectable with the Large Area Telescope (LAT) aboard \textit{the Fermi Space Telescope}

18 pages, 7 figures, accepted for publication in ApJ

References in corpus (18)

• Gamma-Ray Bursts
• X-Ray Flares from Postmerger Millisecond Pulsars
• Gamma-Ray Bursts in the Swift Era
• The First Survey of X-ray Flares from Gamma Ray Bursts Observed by Swift: Temporal Properties and Morphology
• Testing the Curvature Effect and Internal Origin of Gamma-Ray Burst Prompt Emissions and X-ray Flares with Swift Data
• The First Survey of X-ray Flares from Gamma Ray Bursts Observed by Swift: Spectral Properties and Energetics
• The late time evolution of Gamma-Ray Bursts: ending hyperaccretion and producing flares
• The X-ray afterglow flat segment in short GRB 051221A: Energy injection from a millisecond magnetar?
• High Energy Afterglow from Gamma-ray Bursts
• Prompt Emission of High Energy Photons from Gamma Ray Bursts
• GeV-TeV and X-ray flares from gamma-ray bursts
• High Energy Neutrino Flashes from Far-Ultraviolet and X-ray Flares in Gamma-Ray Bursts
• Shallow decay phase of GRB X-ray afterglows from relativistic wind bubbles
• Sub-GeV flashes in $\gamma -$ray burst afterglows as probes of underlying bright UV flares
• Observational Signatures of High-Energy Emission during the Shallow Decay Phase of GRB X-Ray Afterglows
• High energy afterglows and flares from Gamma-Ray Burst by Inverse Compton emission
• GLAST Prospects for Swift-Era Afterglows
• Gamma-Ray Burst high energy emission from Internal Shocks

Cited by in corpus (17)

• Modeling Gamma-Ray Burst X-Ray Flares within the Internal Shock Model
• GRB 090727 and gamma-ray bursts with early time optical emission
• High-energy emission as a test of the prior emission model for gamma-ray burst afterglows
• Swift and Fermi observations of X-ray flares: the case of Late Internal Shock
• Revisiting the Emission from Relativistic Blast Waves in a Density-Jump Medium
• Optical and gamma-ray emissions from internal forward-reverse shocks: application to GRB 080319B?
• Flares in gamma-ray burst X-ray afterglows as prompt emission from slightly misaligned structured jets
• GeV emission from short Gamma-Ray Bursts: the case of GRB 081024B
• X-ray flares from dense shells formed in gamma-ray burst explosions
• Origin of the GeV Emission During the X-ray Flaring Activity in GRB 100728A
• A New Correlation Between GRB X-Ray Flares And The Prompt Emission
• The newly born magnetars powering gamma-ray burst internal-plateau emission: are there strange stars?
• The Low-Energy Spectral Index of Gamma-Ray Burst Prompt Emission from Internal Shocks
• The late jet in gamma-ray bursts and its interactions with a supernova ejecta and a cocoon
• GeV Emission during X-Ray Flares from Late Internal Shocks: Application to GRB 100728A
• Internal shock model for the X-ray flares of Swift J1644+57
• X-ray afterglow of GRB 050712: Multiple energy injections into the external shock