Confronting feedback simulations with observations of hot gas in elliptical galaxies
Abstract
Elliptical galaxies comprise primarily old stars, which collectively generate a long-lasting feedback via stellar mass-loss and Type Ia SNe. This feedback can be traced by X-ray-emitting hot gas in and around such galaxies, in which little cool gas is typically present. However, the X-ray-inferred mass, energy, and metal abundance of the hot gas are often found to be far less than what are expected from the feedback, particularly in so-called low L_X/L_B ellipticals. This "missing" stellar feedback is presumably lost in galaxy-wide outflows, which can play an essential role in galaxy evolution (e.g., explaining the observed color bi-modality of galaxies). We are developing a model that can be used to properly interpret the X-ray data and to extract key information about the dynamics of the feedback and its interplay with galactic environment.
Keywords
Cite
@article{arxiv.1003.1763,
title = {Confronting feedback simulations with observations of hot gas in elliptical galaxies},
author = {Q. Daniel Wang},
journal= {arXiv preprint arXiv:1003.1763},
year = {2015}
}
Comments
To be published in Highlights of Astronomy, Vol 15, XXVIIth IAU General Assembly, JD8