The Birthplace of Gamma-Ray Bursts: Abundance Gradients and Constraints on Progenitors
Abstract
The physics of gamma-ray bursts (GRBs) and their offsets from the centers of their host galaxies are used to investigate the evolutionary state of their progenitors, motivated by the popular idea that GRBs are linked with the cataclysmic collapse of massive stars. We suggest that GRB progenitors in the inner and outer regions of hosts may be intrinsically different: outer bursts appear to have systematically greater isotropic equivalent energies (or narrower jets). This may provide an interesting clue to the nature of GRBs and may reflect a relation between metallicity and the evolution of GRB progenitors. If true, this offset-isotropic luminosity correlation is a strong argument for a collapsar origin of long-duration GRBs.
Additional Information
© 2002. The American Astronomical Society. Received 2001 September 24; accepted 2001 December 6; published 2002 January 7. We thank G. Denicoló, N. Lloyd-Ronning, M. Pettini, M. J. Rees, C. Tout, and the referee for useful comments and suggestions. E. R.-R. acknowledges support from CONACYT, SEP, and the ORS foundation. A. W. B. thanks the Raymond and Beverly Sackler Foundation for financial support at the IoA.Attached Files
Published - pdf
Accepted Version - 0112156.pdf
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Additional details
- Eprint ID
- 76241
- Resolver ID
- CaltechAUTHORS:20170408-164406358
- Consejo Nacional de Ciencia y Tecnología (CONACYT)
- ORS Foundation
- Secretaría de Educación Pública (SEP)
- Created
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2018-03-09Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field