Early rebrightenings of X-ray afterglows from ring-shaped GRB jets

Xu, Ming; Huang, Yun‐Feng

doi:10.1051/0004-6361/201014352

Cited by 13 publications

(7 citation statements)

References 42 publications

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“…A generic dynamical model of GRB outflow was proposed by Huang et al (1999Huang et al ( , 2000a, and has been widely used to interpret the afterglow light curves (e.g., He et al 2009;Xu & Huang 2010). Recently, Pe'er (2012) and Nava et al (2013) have corrected the equation by considering the role of the adiabatic and radiative losses on the hydrodynamical evolution of the shock.…”

Section: Shock Dynamicsmentioning

confidence: 99%

Delayed Energy Injection Model for Gamma-Ray Burst Afterglows

Geng

Huang

et al. 2013

ApJ

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The shallow decay phase and flares in the afterglows of gamma-ray bursts (GRBs) is widely believed to be associated with the later activation of central engine. Some models of energy injection involve with a continuous energy flow since the GRB trigger time, such as the magnetic dipole radiation from a magnetar. However, in the scenario involving with a black hole accretion system, the energy flow from the fall-back accretion may be delayed for a fall-back time ∼ t fb . Thus we propose a delayed energy injection model, the delayed energy would cause a notable rise to the Lorentz factor of the external shock, which will "generate" a bump in the multiple band afterglows. If the delayed time is very short, our model degenerates to the previous models. Our model can well explain the significant re-brightening in the optical and infrared light curves of GRB 081029 and GRB 100621A. A considerable fall-back mass is needed to provide the later energy, this indicates GRBs accompanied with fall-back material may be associated with a low energy supernova so that fraction of the envelope can be survived during eruption. The fall-back time can give meaningful information of the properties of GRB progenitor stars.

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Section: Shock Dynamicsmentioning

confidence: 99%

Delayed Energy Injection Model for Gamma-Ray Burst Afterglows

Geng

Huang

et al. 2013

ApJ

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“…Except for the scenarios mentioned above, it is still possible that the brightening is caused by a continued injection of energy from the central engine into the external jet (Pooley et al 2017;Li et al 2018). The energy injection has been frequently invoked in interpreting many nonstandard afterglow behaviors, such as the X-ray plateau (e.g., Dai & Lu 1998a;Dai 2004;Rowlinson et al 2010;Bucciantini et al 2012;Gompertz et al 2013;Rowlinson et al 2013;Zhang 2013;Fan et al 2013;Lü et al 2015) and the optical rebrightening (e.g., Dai & Lu 1998b;Liu et al 2010;Xu & Huang 2010;Geng et al 2013;Laskar et al 2015;Yu et al 2015;Zhang et al 2016). Moreover, the energy injection is a natural result of late activities of the central engine.…”

mentioning

confidence: 99%

Brightening X-Ray/Optical/Radio Emission of GW170817/SGRB 170817A: Evidence for an Electron–Positron Wind from the Central Engine?

Geng

Dai

Huang

et al. 2018

ApJL

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Recent follow-up observations of the binary neutron star (NS) merging event GW170817/SGRB 170817A reveal that its X-ray/optical/radio emissions are brightening continuously up to ∼ 100 days post-merger. This late-time brightening is unexpected from the kilonova model or the off-axis top-hat jet model for gamma-ray burst afterglows. In this paper, by assuming that the merger remnant is a long-lived NS, we propose that the interaction between an electron-positron-pair (e + e − ) wind from the central NS and the jet could produce a long-lived reverse shock, from which a new emission component would rise and can interpret current observations well. The magnetic-field-induced ellipticity of the NS is taken to be 4×10 −5 in our modeling, so that the braking of the NS is mainly through the gravitational wave (GW) radiation rather than the magnetic dipole radiation, and the emission luminosity at early times would not exceed the observational limits. In our scenario, since the peak time of the brightening is roughly equal to the spin-down time scale of the NS, the accurate peak time may help constrain the ellipticity of the remnant NS. We suggest that radio polarization observations of the brightening would help to distinguish our scenario from other scenarios. Future observations on a large sample of short gamma-ray burst afterglows or detections of GW signals from merger remnants would test our scenario.

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“…Following the generic dynamical equation proposed by Huang et al (1999), many other authors have studied some subtle effects such as the role played by the pressure of the shocked material (van Eerten et al 2010;Pe'er 2012). Xu & Huang (2010) investigated the evolution of a ringshaped jet. Lamb et al (2018) studied the jet-cocoon interaction.…”

Section: Dynamics Of the Remnantmentioning

confidence: 99%

Is the Birth of PSR J0538+2817 Accompanied by a Gamma-ray Burst?

Xu,

Geng,

Wang

et al. 2021

Preprint

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Recently, the Five-hundred-meter Aperture Spherical radio Telescope (FAST) measured the three-dimensional velocity of PSR J0538+2817 in its associated supernova remnant S147 and found a possible spin-velocity alignment in this pulsar. Here we show that the high velocity and the spin-velocity alignment in this pulsar can be explained by the so-called electromagnetic rocket mechanism. In this framework, the pulsar is kicked in the direction of the spin axis, which naturally explains the spin-velocity alignment. We scrutinize the evolution of this pulsar and show that the pulsar kick can create a highly relativistic jet at the opposite direction of the kick velocity. The lifetime and energetics of the jet is estimated. It is argued that the jet can generate a Gamma-ray Burst (GRB). The long term dynamical evolution of the jet is calculated. It is found that the shock radius of the jet should expand to about 32 pc at present, which is well consistent with the observed radius of the supernova remnant S147 (32.1 ± 4.8 pc). Additionally, our calculations indicate that the current velocity of the GRB remnant should be about 440 km s −1 , which is also consistent with the observed blast wave velocity of the remnant of S147 (500 km s −1 ).

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Early rebrightenings of X-ray afterglows from ring-shaped GRB jets

Cited by 13 publications

References 42 publications

Delayed Energy Injection Model for Gamma-Ray Burst Afterglows

Delayed Energy Injection Model for Gamma-Ray Burst Afterglows

Brightening X-Ray/Optical/Radio Emission of GW170817/SGRB 170817A: Evidence for an Electron–Positron Wind from the Central Engine?

Is the Birth of PSR J0538+2817 Accompanied by a Gamma-ray Burst?

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