منابع مشابه
Microlensing of γ-Ray Burst Afterglows
The afterglow of a cosmological Gamma-Ray Burst (GRB) should appear on the sky as a narrow emission ring of radius ∼ 3× 10 cm (t/day)5/8 which expands faster than light. After a day, the ring radius is comparable to the Einstein radius of a solar mass lens at a cosmological distance. Thus, microlensing by an intervening star can modify significantly the lightcurve and polarization signal from a...
متن کاملX–Ray Observations of γ–Ray Burst Afterglows
The discovery by the BeppoSAX satellite of X-ray afterglow emission from the γ-ray burst which occurred on 28 February 1997 produced a revolution in our knowledge of the γ-ray burst phenomenon. Along with the discovery of X-ray afterglows, the optical afterglows of γ-ray bursts were discovered and the distance issue was settled, at least for long γ-ray bursts. The 30 year mystery of the γ-ray b...
متن کاملγ-ray burst internal shocks with magnetization
We investigate γ -ray burst (GRB) internal shocks with moderate magnetization, with the magnetization parameter σ ranging from 0.001 to 10. Possible magnetic dissipation in the stripped magnetized shells is also taken into account through introducing a parameter k (0 < k 1), which is the ratio of the electric field strength of the downstream and the upstream. By solving the general MHD jump con...
متن کاملDissecting the Circumstellar Environment of Γ-ray Burst Progenitors
We investigate properties of the interstellar medium (ISM) in galaxies hosting long-duration γ-ray bursts (GRBs) from an analysis of atomic species (Mg, Fe) and excited fine-structure levels of ions (e.g. Si). Our analysis is guided primarily by echelle observations of GRB 050730 and GRB 051111. These sightlines exhibit fine-structure transitions of O, Si, and Fe gas that have not yet been dete...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2010
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2009.16134.x