Relativistic \(^{56}\text{Ni}\) Decay Lines in GRB 221009A
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912960029392896 |
|---|---|
| author | Moradi, Rahim Yorgancioglu, Emre S. Xiong, Shao-Lin Zhang, Yan-Qiu Zhang, Shuang-Nan Diehl, Roland Wang, Yu |
| author_facet | Moradi, Rahim Yorgancioglu, Emre S. Xiong, Shao-Lin Zhang, Yan-Qiu Zhang, Shuang-Nan Diehl, Roland Wang, Yu |
| contents | Long Gamma Ray Bursts are thought to originate from the core collapse of massive stars that give rise to energetic broad-lined Type Ic supernovae. The brightest burst ever recorded, GRB 221009A, has been linked to a broad-lined Type Ic supernova through late-time observations by the James Webb Space Telescope. An emission line evolving from $\sim$37 to $\sim$6~MeV is detected during the prompt phase. We propose that this time-evolving line is consistent with Doppler-boosted radioactive decay of nickel synthesized in the associated supernova and entrained in the relativistic jet, corresponding to the boosted 158~keV decay branch. We also report evidence for an additional higher-energy excess near $\sim$24~MeV at 290--300~s, detected at moderate statistical significance and consistent with the boosted 270~keV decay branch. The observed kinematics and flux evolution are compatible with expectations from radioactive decay, providing direct spectroscopic evidence linking prompt emission to supernova nucleosynthesis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_10151 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Relativistic \(^{56}\text{Ni}\) Decay Lines in GRB 221009A Moradi, Rahim Yorgancioglu, Emre S. Xiong, Shao-Lin Zhang, Yan-Qiu Zhang, Shuang-Nan Diehl, Roland Wang, Yu High Energy Astrophysical Phenomena Long Gamma Ray Bursts are thought to originate from the core collapse of massive stars that give rise to energetic broad-lined Type Ic supernovae. The brightest burst ever recorded, GRB 221009A, has been linked to a broad-lined Type Ic supernova through late-time observations by the James Webb Space Telescope. An emission line evolving from $\sim$37 to $\sim$6~MeV is detected during the prompt phase. We propose that this time-evolving line is consistent with Doppler-boosted radioactive decay of nickel synthesized in the associated supernova and entrained in the relativistic jet, corresponding to the boosted 158~keV decay branch. We also report evidence for an additional higher-energy excess near $\sim$24~MeV at 290--300~s, detected at moderate statistical significance and consistent with the boosted 270~keV decay branch. The observed kinematics and flux evolution are compatible with expectations from radioactive decay, providing direct spectroscopic evidence linking prompt emission to supernova nucleosynthesis. |
| title | Relativistic \(^{56}\text{Ni}\) Decay Lines in GRB 221009A |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.10151 |