Letter to the Editor
A new method for determining mass-to-light ratios of nearly face-on spiral galaxies
Department of Astronomy, Nanjing University, Nanjing 210093, PR China e-mail: email@example.com
2 Joint Astrophysics Center of Chinese Academy of Science-Peking University, Beijing 100871, PR China
3 The Open Laboratory of Cosmic Ray and High Energy Astrophysics, Chinese Academy of Science
Accepted: 8 December 2005
Aims.This letter gives a new method for determining mass-to-light ratios of nearly face-on spiral galaxies.
Methods.The method is based on the effective thickness of the galactic disk, the distribution of the vertical velocity dispersion, and the surface brightness of a spiral galaxy.
Results.As examples, the results of the determination of NGC 1566 and NGC 5247 in B-band are presented, and their mass-to-light ratios are and respective.
© ESO, 2006