Nonequilibrium Ionization States of Gamma-Ray Burst Environments
スポンサーリンク
概要
- 論文の詳細を見る
Iron spectral features are thought to be the best tracers of progenitors of gamma-ray bursts (GRBs). The detections of spectral features such as an iron line and/or the radiative recombination edge and continuum (RRC) were reported in four X-ray afterglows of GRBs. However, burst for burst, their properties were different from each other. For example, the Chandra observation of GRB 991216 detected a strong H-like iron line together with the RRC. With ASCA, on the other hand, Yoshida and coworkers detected only the strong RRC in GRB 970828. Since it is difficult to produce the strong RRC, we have to consider a special condition for the line-and/or RRC-forming regions. In this Letter, we point out the possibility of a "nonequilibrium ionization state" for the line-and RRC-forming regions.
- American Astronomical Societyの論文
- 2001-08-10
American Astronomical Society | 論文
- Compositional changes in RNA, DNA and proteins for bacterial adaptation to higher and lower temperatures
- Quasar absorption lines with a nonzero cosmological constant
- The Quiescent Counterpart of the Soft Gamma-Ray Repeater SGR 0526-66
- Nonequilibrium Ionization States of Gamma-Ray Burst Environments
- Formation of subgalactic clouds under ultraviolet background radiation