Observation of X-ray Lines from a Gamma-Ray Burst (GRB991216): Evidence of Moving Ejecta from the Progenitor
| Autor: | T. Murakami, M. Feroci, H. V. Bradt, Enrico Costa, John Heise, T. Takeshima, N. Kawai, R. M. Kippen, Gordon P. Garmire, G. Stratta, F. E. Marshall, Mario Vietri, Michael R. Garcia, A. Yoshida, L. Piro, Jules P. Halpern, Dale A. Frail, Kevin Hurley, F. Frontera, V. V. Sokolov, Peter Mészáros |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Physics
Multidisciplinary Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) FOS: Physical sciences Astronomy Lyman-alpha line Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Redshift Afterglow Supernova Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Emission spectrum GRB 011211 Gamma-ray burst Ejecta Astrophysics::Galaxy Astrophysics |
| Zdroj: | Science. 290:955-958 |
| ISSN: | 1095-9203 0036-8075 |
| DOI: | 10.1126/science.290.5493.955 |
| Popis: | We report on the discovery of two emission features observed in the X-ray spectrum of the afterglow of the gamma-ray burst (GRB) of 16 Dec. 1999 by the Chandra X-Ray Observatory. These features are identified with the Ly$_{\alpha}$ line and the narrow recombination continuum by hydrogenic ions of iron at a redshift $z=1.00\pm0.02$, providing an unambiguous measurement of the distance of a GRB. Line width and intensity imply that the progenitor of the GRB was a massive star system that ejected, before the GRB event, $\approx 0.01 \Ms$ of iron at a velocity $\approx 0.1 c$, probably by a supernova explosion. Comment: 11 pages,2 fig.s, link to the published paper in Science, 290, 955 (2000) through http://www.ias.rm.cnr.it/grb/gb991216.html |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
| Nepřihlášeným uživatelům se plný text nezobrazuje | K zobrazení výsledku je třeba se přihlásit. |