The effects of flattening and rotation on the temperature of the X-ray halos of elliptical galaxies

TL;DR

This study investigates how the flattening and rotation of elliptical galaxies influence the temperature of their hot X-ray emitting gas, using realistic galaxy models to understand the variation in observed properties.

Contribution

It provides a detailed analysis of the impact of galaxy shape and rotation on hot gas temperature, a factor not thoroughly examined in previous studies.

Findings

Galaxy flattening affects hot gas temperature.

Rotational support influences X-ray halo temperature.

Structural and kinematic properties partially explain temperature variations.

Abstract

Elliptical galaxies have hot coronae with X-ray luminosities and mean gas temperatures that span over wide ranges. This variation can be partially due to the energy budget of the hot gas, that depends on the host galaxy structure and internal kinematics. With the aid of realistic axisymmetric galaxy models, we performed a diagnostic study focussed on the effects of galaxy flattening and rotational support on the hot gas temperature.