منابع مشابه
Prompt Ia Supernovae Are Significantly Delayed
The time delay between the formation of a population of stars and the onset of type Ia supernovae (SNe Ia) sets important limits on the masses and nature of SN Ia progenitors. Here we use a new observational technique to measure this time delay by comparing the spatial distributions of SNe Ia to their local environments. Previous work attempted such analyses encompassing the entire host of each...
متن کاملBreakup of 11 Be : Prompt or Delayed ?
D. Bazin, J. A. Brown, J. A. Caggiano, L. L. Chen, B. S. Davids, D. J. Morrissey, B. M. Sherrill, and M. Thoennessen National Superconducting Cyclotron, Michigan State University, East Lansing, Michigan 48826 (Received 20 March 1998) The disintegration of a secondary beam of 11Be has been studied in the Coulomb plus nuclear field of Au and Be targets. The vector momentum (longitudinal and trans...
متن کاملPrompt and Delayed Emission Properties of Gamma-ray Bursts Observed with Bepposax
We investigated the spectral evolution in the 2–700 keV energy band of Gamma-Ray Bursts (GRBs) detected by the Gamma-Ray Burst Monitor (GRBM) and localized with the Wide Field Cameras (WFCs) aboard the BeppoSAX satellite before May 1998. Most of them have been followed-up with the Narrow Field Instruments aboard the same satellite. In the light of these results we discuss open issues on the GRB...
متن کاملDetectability of Gravitational Radiation from Prompt and Delayed Star Collapse to a Black Hole
We consider the emission of gravitational waves in the two proposed models for the collapse of a massive star to a black hole: the prompt collapse, in which nearly all the star collapses to a black hole in a dynamical time scale, and the delayed collapse, in which a light black hole, or a neutron star, which subsequently accretes matter, forms due to the fall-back achieving, in the neutron star...
متن کاملFermi Observations of GRB 090902 B : A Distinct Spectral Component in the Prompt and Delayed Emission
We report on the observation of the bright, long gamma-ray burst, GRB 090902B, by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) instruments on-board the Fermi observatory. This was one of the brightest GRBs to have been observed by the LAT, which detected several hundred photons during the prompt phase. With a redshift of z = 1.822, this burst is among the most luminous detec...
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ژورنال
عنوان ژورنال: International Journal of Photoenergy
سال: 2012
ISSN: 1110-662X,1687-529X
DOI: 10.1155/2012/786384