# Alignment between Satellite and Central Galaxies in the EAGLE Simulation: Dependence on the Large-Scale Environments

## TL;DR

This study investigates how the alignment between satellite and central galaxies in the EAGLE simulation depends on large-scale environments, revealing a stronger environmental influence than previously observed.

## Contribution

It demonstrates the environmental dependence of galaxy alignments in the EAGLE simulation, expanding understanding of galaxy formation processes.

## Key findings

- Alignment strength varies significantly with environment in the simulation.
- Simulation results show stronger environmental effects than observational data.
- Exploration of formation mechanisms behind alignment variations.

## Abstract

The alignment between satellite and central galaxies serves as a proxy for addressing the issue of galaxy formation and evolution and has been investigated abundantly in observations and theoretical works. Most scenarios indicate that the satellites preferentially locate along the major axis of their central galaxy. Recent work shows that the strength of alignment signals depends on large-scale environment in observations. We use the publicly-released data from EAGLE to figure out whether the same effect can be found in the hydrodynamic simulation. We found much stronger environmental dependency of alignment signal in simulation. And we also explore change of alignments to address the formation of this effects.