arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.03070astro-ph.GA
收藏

圆盘Galerkin螺旋结构的一个基本平面

A Fundamental Plane of Spiral Structure in Disk Galaxies

Benjamin L. Davis, Daniel Kennefick, Julia Kennefick, Kyle B. Westfall, Douglas W. Shields, Russell Flatman, Matthew T. Hartley, Joel C. Berrier, Thomas P. K. M… 展开作者

Benjamin L. Davis, Daniel Kennefick, Julia Kennefick, Kyle B. Westfall, Douglas W. Shields, Russell Flatman, Matthew T. Hartley, Joel C. Berrier, Thomas P. K. Martinsson, Rob A. Swaters

摘要:

螺旋结构是盘状星系最显著的特征,但关于哪种螺旋结构理论是正确的争论仍然存在。许多版本的密度波理论都要求俯仰角是由星系的凸起和盘中的质量分布唯一决定的。我们提出的证据表明,在磁盘星系的对数螺旋臂的俯仰角的切线强烈相关的中性原子氢在磁盘中的密度和中央恒星的星系的凸起质量。这三个量,当绘制对彼此,形成一个平面的关系,我们认为应该是根本的,我们的理解螺旋结构的盘星系。我们进一步认为,任何成功的螺旋结构理论必须能够解释这种关系。

英文摘要:

Spiral structure is the most distinctive feature of disk galaxies and yet debate persists about which theory of spiral structure is the correct one. Many versions of the density wave theory demand that the pitch angle is uniquely determined by the distribution of mass in the bulge and disk of the galaxy. We present evidence that the tangent of the pitch angle of logarithmic spiral arms in disk galaxies correlates strongly with the density of neutral atomic hydrogen in the disk and with the central stellar bulge mass of the galaxy. These three quantities, when plotted against each other, form a planar relationship which, we argue should be fundamental to our understanding of spiral structure in disk galaxies. We further argue that any successful theory of spiral structure must be able to explain this relationship.

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。

↑