| タイトル | The locations of cosmic explosions |
| 著者（英） | Burud, I.; Castro-Ceron, J. M.; Vreeswijk, P. M.; Fruchter, A. S.; Strolger, L.; Consclice, C.; Bersier, D.; Strolger, L.; Dahlen, T.; Levan, A. J. |
| 著者所属（英） | National Space Science and Technology Center |
| 発行日 | 2005-01-01 |
| 言語 | eng |
| 内容記述 | When massive stars exhaust their fuel they collapse and often produce the extraordinarily bright explosions known as core-collapse supernovae. Recently, it has become apparent that stellar collapse can power the even more brilliant relativistic explosions known as long-duration gamma-ray bursts. In some cases, a gamma-ray burst and a supernova have been observed from the same event. One would thus expect that gamma-ray bursts and supernovae should be found in similar environments. Here we show that this expectation is wrong. Using Hubble Space Telescope imaging of the host galaxies of long-duration gamma-ray bursts and core-collapse supernovae, we demonstrate that while the distribution of the supernovae in their hosts traces the blue light of young stars, the gamma-ray bursts are much more concentrated on the very brightest regions of their hosts. Furthermore, the host galaxies of the gamma-ray bursts are significantly fainter and more irregular than the hosts of the supernovae. Together these results suggest that long-duration gamma-ray bursts are associated with the very most massive stars and may be restricted to galaxies of limited chemical evolution. Our results directly imply that long-duration gamma-ray bursts are relatively rare in galaxies such as our own Milky Way. |
| NASA分類 | Astronomy |
| 権利 | Copyright |
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