arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.05904astro-ph.HE
收藏

银河系中心附近超新星遗迹的演化

Evolution of Supernova Remnants near the Galactic Center

Almog Yalinewich, Tsvi Piran, Re'em Sari

摘要:

银河系中心附近的超新星与正常的银河系超新星演化不同。这主要是由于超新星遗迹传播的环境。而不是一个静态的,均匀的密度介质,信噪比附近的银河系中心传播到一个风扫环境中的速度远离银河系中心,和梯度密度分布。这就导致了这些SNRs是非球形的,并且比银河系中的SNRs演化得更快.我们开发了一个分析理论内的恒星风爆炸的演变,并验证它使用流体动力学代码。我们表明,这种爆炸可以演变成三种可能的形态之一。利用这些结果,我们讨论了两个SNRs(SGR东和SGR A的双极射电/X射线瓣)和两个中子星(炮弹和SGR J 1745 -2900)在银河系中心附近的关联。我们表明,鉴于SNR的形态和中子星的位置,唯一可能的关联是SGR A的双极射电/X射线瓣和SGR J1745-2900之间。在SGR East爆炸中产生的致密物体仍然没有被发现,而创造炮弹的超新星的SNR已经消失了。

英文摘要:

Supernovae near the galactic center evolve differently from regular galactic supernovae. This is mainly due to the environment into which the supernova remnants propagate. Instead of a static, uniform density medium, SNRs near the galactic center propagate into a wind swept environment with a velocity away from the galactic center, and a graded density profile. This causes these SNRs to be non - spherical, and to evolve faster than their galactic counterparts. We develop an analytic theory for the evolution of explosions within a stellar wind, and verify it using a hydrodynamic code. We show that such explosions can evolve in one of three possible morphologies. Using these results we discuss the association between the two SNRs (SGR East and SGR A's bipolar radio/X-ray Lobes) and the two neutron stars (the cannonball and SGR J1745-2900) near the galactic center. We show that, given the morphologies of the SNR and positions of the neutron stars, the only possible association is between SGR A's bipolar radio/X-ray Lobes and SGR J1745-2900. The compact object created in the explosion of SGR East remains undetected, and the SNR of the supernova that created the cannonball has already disappeared.

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。

↑