next up previous contents
Next: Results Up: Tests on artificial galaxies Previous: 1D: Test fitting   Contents


2D: Test fitting

To obtain an indication of the quality of our fitting method and the resulting parameters we selected three artifical galaxies. One with $\mu_{n-k}$ is 4, $f_h$ = 2.5 and $f_z$ = 6, one with $\mu_{n-k}$ is 3, $f_h$ = 1.0 and $f_z$ = 2 and one with $\mu_{n-k}$ is 2, $f_h$ = 1.5 and $f_z$ = 2.5. We set the difference between the central magnitude and $\mu_\textrm{\scriptsize cut}$ at 7.4 mag arcsec$^{-2}$.
To test the influence of disk truncation our radial parameters values two types of model galaxies were created: one with a disk truncation and one without. We use a version without truncation because the Bessel function, which uses line-of-sight integration, assumes the radial behaviour stays the same between $r$ = 0 until $\infty$, but this is of course not how a typical galaxy behaves radially. The first two galaxies were used for these for different fits. On both galaxy models two 2D Two Disk models were applied: The two dimensional exponential fitting function and the two dimensional Bessel fitting function.
The third galaxy resembles one of the sample galaxies by Yoachim & Dalcanton (2006) to see how our fitting function would respond to such a case.


next up previous contents
Next: Results Up: Tests on artificial galaxies Previous: 1D: Test fitting   Contents
O.A. van den Berg 2006-09-05