arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1504.00145astro-ph.HE
收藏

伽马射线暴中重元素的核合成

Nucleosynthesis of heavy elements in gamma ray bursts

Agnieszka Janiuk, Bartlomiej Kaminski

摘要:

在伽马射线暴中产生瞬发和余辉的超相对论喷流,大概是由一个中心引擎驱动的,该引擎由围绕旋转的黑洞的致密吸积盘组成。我们考虑这样的发动机,由自由核子,电子-正电子对,氦核,和冷却的中微子发射。盘中中子的显著数密度为流出物和射流中的富中子等离子体提供了条件。在离黑洞150-250引力半径的吸积流中也会形成重核。我们研究的过程中的伽玛射线暴引擎,根据其物理特性。我们的结果可能对伽玛暴余辉中的喷流减速过程和重元素观测具有重要的意义。

英文摘要:

The ultrarelativistic jets responsible for prompt and afterglow emission in gamma ray bursts are presumably driven by a central engine that consists of a dense accretion disk around a spinning black hole. We consider such engine, composed of free nucleons, electron-positron pairs, Helium nuclei, and cooled by neutrino emission. A significant number density of neutrons in the disk provide conditions for neutron rich plasma in the outflows and jets. Heavy nuclei are also formed in the accretion flow, at the distances 150-250 gravitational radii from the black hole. We study the process of nucleosynthesis in the GRB engine, depending on its physical properties. Our results may have important observational implications for the jet deceleration process and heavy elements observed in the spectra of GRB afterglows.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑