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 0907.0068astro-ph.COastro-ph.IM
收藏

引力微透镜:一种并行的大数据实现

Gravitational Microlensing: A parallel, large-data implementation

Hugh Garsden, Geraint F. Lewis

摘要:

引力透镜使我们能够在广泛的天文尺度上探测物质的结构,当来自遥远光源的光穿过居间星系时,行星、恒星和黑洞等致密物质就像是单独的透镜。这种微透镜效应的放大导致亮度的快速波动,不仅揭示了透镜效应物质的性质,而且还揭示了光源中的表面亮度分布。然而,虽然由于单个恒星的偏转组合是线性的,但由此产生的放大率是高度非线性的,这导致了重大的计算挑战,目前限制了可以解决的问题的范围。本文提出了一种新的和新颖的实现的数值方法引力微透镜,增加了规模的问题,可以解决两个以上的数量级,开辟了一个新的制度天体物理学有趣的问题。

英文摘要:

Gravitational lensing allows us to probe the structure of matter on a broad range of astronomical scales, and as light from a distant source traverses an intervening galaxy, compact matter such as planets, stars, and black holes act as individual lenses. The magnification from such microlensing results in rapid brightness fluctuations which reveal not only the properties of the lensing masses, but also the surface brightness distribution in the source. However, while the combination of deflections due to individual stars is linear, the resulting magnifications are highly non-linear, leading to significant computational challenges which currently limit the range of problems which can be tackled. This paper presents a new and novel implementation of a numerical approach to gravitational microlensing, increasing the scale of the problems that can be tackled by more than two orders of magnitude, opening up a new regime of astrophysically interesting problems.

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。

↑