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radtrans3.tex
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radtrans3.tex
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\documentclass{standalone}
%\pagenumbering{gobble}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% HI 21cm line schematic
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{tikz,xcolor}
\usetikzlibrary{arrows,snakes}
\begin{document}
\begin{tikzpicture}[scale=1.0, font=\sffamily]
\draw[very thick] (0,0) ellipse (1 and 3);
\draw[thick, fill=black] (-0.3,-0.6) ellipse (0.03 and 0.09);
\node[align=center] at (0,0.85) {\huge{$A_s$}};
\draw[very thick, fill=gray!20] (16,0) ellipse (0.333 and 1);
\draw[thick, dotted] (-0.3,-0.6) -- (16,1);
\draw[thick, dotted] (-0.3,-0.6) -- (16,-1);
\node[align=center] at (16,0.35) {\Large{$A_t$}};
\node[align=center] at (3.5,-0.49) {\large{$\Omega_t$}};
\draw (3.8,-0.71) arc (-18:18:0.83);
\draw[thick, <->] (0,-3.3) -- (16,-3.3);
\node[align=center] at (8,-3.6) {\huge{\it d}};
\node[align=center] at (0,-3.6) {\Large source};
\node[align=center] at (16,-3.6) {\Large telescope};
\end{tikzpicture}
\end{document}