Correlations among global photometric properties of disk galaxies

Details Correlations among global photometric properties of disk galaxies Correlations among global photometric properties of disk galaxies

1999-11-22

arxiv.org/abs/astro-ph/9911402v1

Astronomy and Astrophysics

Astrophysics

14 pages, LaTeX including 14 figures. To appear in the Astrophysical Journal

Scientific paper

10.1086/308654

Using a two-dimensional galaxy image decomposition technique, we extract global bulge and disk parameters for a complete sample of early type disk galaxies in the near infrared K band. We find significant correlation of the bulge parameter n with the central bulge surface brightness $\mu_b(0)$ and with effective radius r_e. Using bivar iate analysis techniques, we find that $\log n$, $\log r_e$ and $\mu_b(0)$ are distributed in a plane with small scatter. We do not find a strong correlation of n with bulge-to-disk luminosity ratio, contrary to earlier reports. r_e and the disk scale length r_d are well correlated for these early type disk galaxies, but with large scatter. We examine the implications of our results to various bulge formation scenarios in disk galaxies.

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