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\begin{document}
\title{Radio Astrophysics}
\author{Barbara Manganis \and Albert Dvornik}
\date{6 December 1993}
\maketitle

\begin{abstract}
Radio-wave emissions at the wavelength of 21~cm in the provide a
useful tool in the study of the structure of our galaxy.  These
emissions result from spin-flip transitions in monotomic hydrogen, and
come to us virtually undisturbed from all parts of the galaxy. In this
paper, we show that the velocity curve of the galaxy can be determined
from observation of the Doppler shift of the 21~cm line.  In addition,
we determine the effective temperature of the Sun in the 21~cm region
to be aprroximately 60,000 K.
\end{abstract}

\input intro.tex
\input line.tex
\input equipment.tex
\input sun.tex
\input sky.tex
\clearpage
\input biblio.tex

\appendix
\input correct.tex
\input data.tex
\input prep.tex

\end{document}
