\documentclass[11pt,letterpaper]{article} %\usepackage{aas_macros} \usepackage{biblatex} \usepackage{graphicx} \usepackage[margin=1.in,centering]{geometry} \usepackage{hyperref} \usepackage{caption} \usepackage[export]{adjustbox} \usepackage{float} \usepackage{gensymb} \bibliography{/home/caes/wmu/phy-4660/adv_lab.bib} \begin{document} %\newcommand{}$^7\textrm{Li(p,}\alpha)^4\textrm{He}$ reaction.\\ \newcommand{\LCDM}{$\Lambda$CDM} \title{Active Galactic Nuclei in Cosmology} \author{Otho Ulrich} \maketitle \begin{abstract} Active Galactic Nuclei (AGN) play a role in cosmology as both component and probe. They are used to contrain cosmological parameters, to characterize the intergalactic medium, and as a . AGN interact with their host galaxies, influencing its evolution through a process called AGN feedback. Modeling AGN feedback presents significant challenges, but has improved upon the \LCDM model as tested by the Millenium Simulation. \cite{2005Natur.435..629S} \end{abstract} %───────────── \section{Introduction} \label{sec:intro} %───────────── \section{Cosmology} \label{sec:cosmology} \subsection{Millenium Simulation} The Millenium Simulation tests the \LCDM cosmology %───────────── \section{Conclusion} \label{sec:conclusion} \printbibliography \end{document}