Determination of the Thickness of Non-Edge-on Disk Galaxies

We propose a method to determine the thickness of non-edge-on disk galaxies from their observed structure of spiral arms, based on the solution of the truly three-dimensional Poisson's equation for a logarithmic disturbance of density and under the condition where the self-consistency of the density wave theory is no longer valid. From their measured number of arms, pitch angle and location of the innermost point of the spiral arms, we derive and present the thicknesses of 34spiral galaxies.

作 者： Ying-He Zhao Qiu-He Peng Lan Wang   作者單位： Ying-He Zhao,Lan Wang(Department of Astronomy, Nanjing University, Nanjing 210093)

Qiu-He Peng(Department of Astronomy, Nanjing University, Nanjing 210093;Joint Astrophysics Center of Chinese Academy of Science-Peking University, Beijing 100871;The Open Laboratory of Cosmic Ray and High Energy Astrophysics, Chinese Academy of Scinces) 

刊 名： 天體物理學報(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS  年，卷(期)： 2004 4(1)  分類號： P1  關鍵詞： galaxies: non-edge-on galaxies - galaxies: spiral - thickness: density wave theory  

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