Hambaryan, V. V. 2012 公元775/4年的C14增加可能是一个短暴
主要内容:
文章信息:
Find Similar Abstracts (with default settings below) - · arXiv e-print (arXiv:1211.2584)
- · References in the Article
- · Also-Read Articles (Reads History)
- ·
- · Translate This Page
| Title: | A Galactic short gamma-ray burst as cause for the 14C peak in AD 774/5 | |
| Authors: | Hambaryan, V. V.; Neuhaeuser, R. | |
| Publication: | eprint arXiv:1211.2584 | |
| Publication Date: | 11/2012 | |
| Origin: | ARXIV | |
| Keywords: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics | |
| Comment: | MNRAS, accepted; 6 pages, 3 figures | |
| Bibliographic Code: | 2012arXiv1211.2584H |
Abstract
In the last 3000 yr, one significant and rapid increase in the concentration of 14C in tree rings was observed; it corresponds to a gamma-ray energy input of 7x10^24 erg at Earth within up to one year in AD 774/5 (Miyake et al. 2012). A normal supernova and a solar or stellar flare are unlikely as cause (Miyake et al. 2012), so that the source remained unknown. Here, we show that a short gamma-ray burst (GRB) in our Galaxy is consistent with all observables: Such an event is sufficiently short and provides the necessary energy in the relevant spectral range of $\gamma$-rays. Its spectral hardness is consistent with the differential production rates of 14C and 10Be as observed. The absence of reports about a historic sighting of a supernova in AD 774/5 or a present-day supernova remnant are also consistent with a short GRB. We estimate the distance towards this short GRB to be ~ 1 to 4 kpc - sufficiently far away, so that no extinction event on Earth was triggered. This is the first evidence for a short GRB in our Galaxy.| Bibtex entry for this abstract Preferred format for this abstract (see Preferences) |
