Newsletter >> Topic - Green Card Information Boats Phentermine online Ladies handbag furniture Mobiles Loan Online Online notebook shop Necklace auto-moto Best Ringtones Chairs Intimate goods Free Ringtones Cigarettes Credits Dating Underwear Free Ringtones Autos Vicodin online Pills, Compare pills, Reviews pills Tunings Hydrocodone online Ambien online Sport Betting Fioricet online Free mp3 ringtones Rolex Replica Ornaments Cars Xanax online Bracelets Building materials Cialis online Soma online ya.by Ear rings Sportswear Trousers Cheap pharmacy shop Balans Get ringtones online FDA Approved Pharmacy Cheap drugs online shop Valium online Boots Tramadol online Download Ringtones Cases Fashions Top casino Cigarette Suits Phentermine No Prescription Top auto-moto Medical tests Evening dress Blog Search the Web Replica Rolex Rington mp3 music for mobile Adipex online Tables Chronometer

The magnetization degree of the outflow powering the highly-polarized reverse shock emission of GRB 120308A. (arXiv:1407.6430v1 [astro-ph.HE])

July 25th, 2014

Shuai Zhang, Zhi-Ping Jin, Da-Ming Wei

GRB 120308A, a long duration $\gamma-$ray burst detected by {\it Swift}, was
distinguished by a highly-polarized early optical afterglow emission that
strongly suggests an ordered magnetic field component in the emitting region.
In this work we model the optical and X-ray emission in the reverse and forward
shock scenario and show that the strength of the magnetic field in reverse
shock region is $\sim 10$ times stronger than that in the forward shock region.
Consequently the outflow powering the highly-polarized reverse shock optical
emission was mildly-magnetized at a degree $\sigma \sim$ a few percent.
Considering the plausible magnetic energy dissipation in both the acceleration
and prompt emission phases of the Gamma-ray Burst (GRB) outflow, the afterglow
data of GRB 120308A provides us the compelling evidence that at least for some
GRBs a non-ignorable fraction of the energy was released in the form of
Poynting-flux, confirming the finding firstly made in the reverse-forward shock
emission modeling of the optical afterglow of GRB 990123 (Fan et al. 2002;
Zhang et al. 2003).


http://arxiv.org/abs/1407.6430


Posted in All Recent GRB Papers | Comments Off

Distributions of Gamma-Ray Bursts and Blazars in the $L_{\rm p}-E_{\rm p}$ Plane and Possible Implications for their Radiation Physics. (arXiv:1407.6159v1 [astro-ph.HE])

July 24th, 2014


Posted in All Recent GRB Papers | Comments Off

Inverse cascade of non-helical magnetic turbulence in a relativistic fluid. (arXiv:1407.5626v1 [astro-ph.HE])

July 23rd, 2014


Posted in All Recent GRB Papers | Comments Off

Ultra-high Energy Cosmic Rays and Neutrinos from Gamma-Ray Bursts, Hypernovae and Galactic Shocks. (arXiv:1407.5671v1 [astro-ph.HE])

July 23rd, 2014


Posted in All Recent GRB Papers | Comments Off

GRB 130925A: an ultra-long Gamma Ray Burst with a dust-echo afterglow, and implications for the origin of the ultra-long GRBs. (arXiv:1403.4079v2 [astro-ph.HE] UPDATED)

July 22nd, 2014


Posted in All Recent GRB Papers | Comments Off

Connecting GRBs and ULIRGs: A Sensitive, Unbiased Survey for Radio Emission from Gamma-Ray Burst Host Galaxies at 0<z<2.5. (arXiv:1407.4456v1 [astro-ph.HE])

July 18th, 2014


Posted in All Recent GRB Papers | Comments Off

The afterglow of a relativistic shock breakout and low luminosity GRBs. (arXiv:1407.4475v1 [astro-ph.HE])

July 18th, 2014


Posted in All Recent GRB Papers | Comments Off

GROND coverage of the main peak of Gamma-Ray Burst 130925A. (arXiv:1407.4210v1 [astro-ph.HE])

July 17th, 2014


Posted in All Recent GRB Papers | Comments Off

Light Curve Properties of Supernovae Associated With Gamma-ray Bursts. (arXiv:1407.3506v1 [astro-ph.HE])

July 15th, 2014


Posted in All Recent GRB Papers | Comments Off

Hubble Space Telescope observations of the afterglow, supernova and host galaxy associated with the extremely bright GRB 130427A. (arXiv:1307.5338v2 [astro-ph.HE] UPDATED)

July 15th, 2014


Posted in All Recent GRB Papers | Comments Off

« Previous Entries