We revisit Cavallo and Rees classification based on the analysis of initial conditions in electron-positron-photon plasma which appears suddenly around compact astrophysical objects and gives origin to GRBs. These initial conditions were recently studied in [1,2] by numerical integration of relativistic Boltzmann equations with collision integrals, including binary and triple interactions between particles. The main conclusion is that the pair plasma in GRB sources quickly reaches thermal equilibrium well before its expansion starts. In light of this work we comment on each of the four scenarios proposed by Cavallo and Rees and discuss their applicability to describe evolution of GRB sources. © 2008 American Institute of Physics.
Fireshell versus Fireball scenarios / DE BARROS, G; Aksenov, A; BIANCO C., L; Ruffini, Remo; Vereshchagin, G.. - In: AIP CONFERENCE PROCEEDINGS. - ISSN 0094-243X. - 1065:(2008), pp. 234-237. (Intervento presentato al convegno 2008 NANJING GAMMA-RAY BURST CONFERENCE. tenutosi a Nanjing; China nel 23-27 June 2008) [10.1063/1.3027919].
Fireshell versus Fireball scenarios
RUFFINI, Remo;
2008
Abstract
We revisit Cavallo and Rees classification based on the analysis of initial conditions in electron-positron-photon plasma which appears suddenly around compact astrophysical objects and gives origin to GRBs. These initial conditions were recently studied in [1,2] by numerical integration of relativistic Boltzmann equations with collision integrals, including binary and triple interactions between particles. The main conclusion is that the pair plasma in GRB sources quickly reaches thermal equilibrium well before its expansion starts. In light of this work we comment on each of the four scenarios proposed by Cavallo and Rees and discuss their applicability to describe evolution of GRB sources. © 2008 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
