# Colour asymmetry between galaxies with clockwise and counterclockwise handedness

## TL;DR

This study analyzes SDSS galaxy data to identify colour differences based on galaxy handedness, revealing significant variations in the i-r colour between clockwise and anti-clockwise galaxies, especially within specific right ascension ranges.

## Contribution

It is the first large-scale analysis comparing galaxy colours with respect to their handedness, highlighting significant colour asymmetries in SDSS galaxies.

## Key findings

- Clockwise galaxies have higher i-r colour than anti-clockwise galaxies.
- The colour difference varies with right ascension, being strongest between 30° and 60°.
- Colour asymmetry is less pronounced between 180° and 210° RA.

## Abstract

Recent studies have shown that SDSS galaxies with clockwise patterns are photometrically different from galaxies with anti-clockwise patterns. The purpose of this study is to identify possible differences between the colour of galaxies with clockwise handedness and the colour of galaxies with anti-clockwise handedness. A dataset of 162,514 SDSS galaxies was separated into clockwise and counterclockwise galaxies, and the colours of spiral galaxies with clockwise handedness were compared to the colour of spiral galaxies with anti-clockwise handedness. The results show that the i-r colour in clockwise galaxies in SDSS is significantly higher compared to anti-clockwise SDSS galaxies. The colour difference is strongest between the right ascension of 30$^o$ and 60$^o$, while the RA range of 180$^o$ to 210$^o$ shows a much smaller difference.