Some statistical properties of spiral galaxies

Details Some statistical properties of spiral galaxies Some statistical properties of spiral galaxies

2000-02-25

arxiv.org/abs/astro-ph/0002476v1

A&A, 1999, 350, 31

Astronomy and Astrophysics

Astrophysics

8 pages, LaTex, 7 figures

Scientific paper

This paper presents some statistical correlations of 72 northern spiral galaxies. The results show that early-type spirals that are brighter, and thicker, and the axis ratios ($H_{z}/H_r$) of the disk tend to be smaller along the Hubble sequence. We also find that $H_{z}/H_r$ correlates strongly with the galaxy's color, and early-type spirals have larger values of $H_{z}/H_r$. The inclinations obtained by fitting the pattern of a spiral structure with a logarithmic spiral form are nearly the same as those obtained by using the formulas of Aaronson et al. (1980). Finally, the mean measured pitch angles for the different Hubble sequences in the Third Catalogue of Bright Galaxies by de Vaucouleurs et al. (1991) are derived.

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