Gamma ray bursts theory
نویسندگان
چکیده
منابع مشابه
Gamma-Ray Bursts - When Theory Meets Observations
Gamma-Ray Bursts (GRBs) are the brightest objects observed. They are also the most relativistic objects known so far. GRBs occur when an ultrarelativisitic ejecta is slowed down by internal shocks within the flow. Relativistic particles accelerated within these shocks emit the observed gamma-rays by a combination of synchrotron and inverse Compton emission. External shocks with the circumstella...
متن کاملA Theory of Gamma - Ray Bursts
Recent observations and theoretical considerations have linked gamma-ray bursts with ultra-bright type Ibc supernovae ('hypernovae'). We here work out a specific scenario for this connection. Based on earlier work, we argue that especially the longest bursts must be powered by the Blandford-Znajek mechanism of electromagnetic extraction of spin energy from a black hole. Such a mechanism require...
متن کاملOn Gamma-Ray Bursts
R. Ruffini,1,2,3 M.G. Bernardini,1,2 C.L. Bianco,1,2,3 L. Caito,1,2 P. Chardonnet,1,3,4 C. Cherubini,1,5 M.G. Dainotti,1,2 F. Fraschetti, A. Geralico,1,2 R. Guida,1,2 B. Patricelli,1,2 M. Rotondo,1,2 J.A. Rueda Hernandez,1,2 G. Vereshchagin,1,2,3 S.-S. Xue1,3 1 ICRANet and ICRA, Piazzale della Repubblica 10, I-65122 Pescara, Italy. 2 Dip. di Fisica, Università di Roma “La Sapienza”, Piazzale Al...
متن کاملCosmic Gamma - Ray Bursts
1. Abstract GRBs have remained a puzzle for many high–energy astrophysicists since their discovery in 1967. With the advent of the X–ray satellites BeppoSAX and RossiXTE, it has been possible to carry out deep multi-wavelength observations of the counterparts associated with the GRBs just within a few hours of occurence, thanks to the observation of the fading X-ray emission that follows the mo...
متن کاملGamma-ray bursts.
Gamma-ray bursts (GRBs) are bright flashes of gamma rays coming from the cosmos. They occur roughly once per day, typically last for tens of seconds, and are the most luminous events in the universe. More than three decades after their discovery, and after pioneering advances from space and ground experiments, they still remain mysterious. The launch of the Swift and Fermi satellites in 2004 an...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2008
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.4337