# Determination of the Galaxy Cluster Orientation Using X-ray Images by   FOCAS Method

**Authors:** A.V. Tugay, S.Yu. Shevchenko

arXiv: 1812.04349 · 2018-12-19

## TL;DR

This study analyzed the orientations of galaxy cluster X-ray halos using the FOCAS method on 78 clusters, finding no preferred alignment patterns in their orientations.

## Contribution

It applies the FOCAS method to determine galaxy cluster orientations from X-ray images, providing a new approach to analyze cluster alignments.

## Key findings

- No privileged orientations were observed.
- Eccentricities and position angles were successfully calculated.
- Results suggest random orientations of galaxy clusters.

## Abstract

In our work we considered orientations of bright X-ray halos of the galaxy clusters (mainly Abell clusters). 78 appropriate clusters were selected using data from Xgal sample of extragalactic objects in XMM-Newton observation archive. Position angles and eccentricities of these halos were calculated applying FOCAS method. No privileged orientations were found.

## Full text

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## Figures

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Source: https://tomesphere.com/paper/1812.04349