Preferred Alignment of Spatial Orientation of SDSS DR16 Galaxy Using U-band Data in the Redshift Range 0.21–0.24

Abstract

This study investigates the spatial orientation of spin vectors of 915 galaxies selected from the Sloan Digital Sky Survey (SDSS) Data Release 16(DR16), within the redshift range 0.21 ≤ z ≤ 0.24. These galaxies were analyzed to examine the presence of any anisotropic patterns in their spin vector distributions, with a particular interest in the possible influence of the u-band magnitude. The inclination and position angles were computed using shape parameters (me1_ u and me2_ u) to derive the three dimensional orientation of spin vectors. The spatial orientations were statistically tested using chi-square, auto correlation, and Fourier analysis methods, focusing on both the polar and azimuthal angle distributions. While the study aimed to explore the dependence of spin orientation on u-band magnitude, the analysis was conducted on the dataset due to scope limitations. None the less, the findings provide strong evidence for preferred spin vector alignment. These finding supports the pancake model of the galaxy evolution theory.