arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0811.4492astro-phhep-ph
收藏

衰变暗物质中银河系中心的同步辐射

Synchrotron Radiation from the Galactic Center in Decaying Dark Matter Scenario

Koji Ishiwata, Shigeki Matsumoto, Takeo Moroi

摘要:

讨论了不稳定暗物质情况下银河系中心的同步辐射通量。PAMELA合作组最近报道的正电子分数异常过剩的动机下,我们考虑的情况下,暗物质粒子是不稳定的(和长寿命),高能电子和正电子产生的衰变的暗物质。然后,发射的电子和正电子成为同步辐射的源。我们计算了衰变暗物质模型的同步辐射通量,这可以解释PAMELA正电子过剩。取暗物质的寿命为O(10^26秒),这是解释PAMELA异常的建议值,发现同步辐射通量为O(1 kJy/str)或更小,这取决于粒子物理学和宇宙学参数。

英文摘要:

We discuss the synchrotron radiation flux from the Galactic center in unstable dark matter scenario. Motivated by the anomalous excess of the positron fraction recently reported by the PAMELA collaboration, we consider the case that the dark matter particle is unstable (and long-lived), and that energetic electron and positron are produced by the decay of dark matter. Then, the emitted electron and positron becomes the source of the synchrotron radiation. We calculate the synchrotron radiation flux for models of decaying dark matter, which can explain the PAMELA positron excess. Taking the lifetime of the dark matter of O(10^26 sec), which is the suggested value to explain the PAMELA anomaly, the synchrotron radiation flux is found to be O(1 kJy/str) or smaller, depending on the particle-physics and cosmological parameters.

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。

↑