Photospheric emission from long duration gamma-ray bursts powered by variable engines Public Deposited

http://ir.library.oregonstate.edu/concern/articles/9593tw80f

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  • We present the results of a set of numerical simulations of long-duration gamma-ray burst jets aimed at studying the effect of a variable engine on the peak frequency of the photospheric emission. Our simulations follow the propagation of the jet inside the progenitor star, its break-out, and the subsequent expansion in the environment out to the photospheric radius. A constant and two step-function models are considered for the engine luminosity. We show that our synthetic light-curves follow a luminosity-peak frequency correlation analogous to the Golenetskii correlation found in long-duration gamma-ray burst observations. Within the parameter space explored, it appears that the central engine luminosity profile does not have a significant effect on the location of a gamma-ray burst in the Luminosity-peak frequency plane, bursts from different central engines being indistinguishable from each other.
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  • López-Cámara, D., Morsony, B. J., & Lazzati, D. (2014). Photospheric emission from long-duration gamma-ray bursts powered by variable engines. Monthly Notices of the Royal Astronomical Society, 442(3), 2202-2207. doi:10.1093/mnras/stu1016
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  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2015-03-02T19:55:45Z No. of bitstreams: 1 LazzatiDavidePhysicsPhotosphericEmissionLong.pdf: 3643560 bytes, checksum: 529878c6377f0628291ee2dffcc6cde4 (MD5)
  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2015-03-02T19:55:58Z (GMT) No. of bitstreams: 1 LazzatiDavidePhysicsPhotosphericEmissionLong.pdf: 3643560 bytes, checksum: 529878c6377f0628291ee2dffcc6cde4 (MD5)
  • description.provenance : Made available in DSpace on 2015-03-02T19:55:58Z (GMT). No. of bitstreams: 1 LazzatiDavidePhysicsPhotosphericEmissionLong.pdf: 3643560 bytes, checksum: 529878c6377f0628291ee2dffcc6cde4 (MD5) Previous issue date: 2014-08-11

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