%\documentstyle[12pt,twoside,a4j,jtwocolumn]{jarticle}
\documentstyle[12pt,a4j]{jarticle}
%A4=21cm * 29.8cm
%1inch=6pc=2.54cm


\oddsidemargin  -0.5cm %\oddsidemargin  0.46cm % + 1inch = 3cm
%\evensidemargin 0cm %\evensidemargin 0.46cm % + 1inch = 3cm
\textwidth 17cm
\topmargin -1cm      %\topmargin -1cm
\headsep 0.8cm
\textheight 24cm
\footheight 0.5cm
\footskip 1.2cm

\pagestyle{myheadings}
%\pagenumbering{roman}

\newcommand{\re}{\par\hangindent=0.5cm\hangafter=1\noindent}
\newcommand{\se}{\par\hangindent=12mm\hangafter=1\indent}
\newcommand{\noi}{\vspace{14pt} \noindent}
\newcommand{\vs}{\vspace{14pt}}
\newcommand{\hs}{\hspace{14pt}}

\newcommand{\ds}{\displaystyle}
\newcommand{\lsim}{\raisebox{0.3mm}{\em $\, <$} \hspace{-3.3mm}
\raisebox{-1.8mm}{\em $\sim \,$}}
\newcommand{\gsim}{\raisebox{0.3mm}{\em $\, >$} \hspace{-3.3mm}
\raisebox{-1.8mm}{\em $\sim \,$}}

\newcommand{\bm}{\boldmath}
\newcommand{\bmA}{\mbox{\bm $A$}} \newcommand{\bma}{\mbox{\bm $a$}}
\newcommand{\bmB}{\mbox{\bm $B$}} \newcommand{\bmb}{\mbox{\bm $b$}}
\newcommand{\bmC}{\mbox{\bm $C$}} \newcommand{\bmc}{\mbox{\bm $c$}}
\newcommand{\bmD}{\mbox{\bm $D$}} \newcommand{\bmd}{\mbox{\bm $d$}}
\newcommand{\bmE}{\mbox{\bm $E$}} \newcommand{\bme}{\mbox{\bm $e$}}
\newcommand{\bmF}{\mbox{\bm $F$}} \newcommand{\bmf}{\mbox{\bm $f$}}
\newcommand{\bmG}{\mbox{\bm $G$}} \newcommand{\bmg}{\mbox{\bm $g$}}
\newcommand{\bmH}{\mbox{\bm $H$}} \newcommand{\bmh}{\mbox{\bm $h$}}
\newcommand{\bmI}{\mbox{\bm $I$}} \newcommand{\bmi}{\mbox{\bm $i$}}
\newcommand{\bmJ}{\mbox{\bm $J$}} \newcommand{\bmj}{\mbox{\bm $j$}}
\newcommand{\bmK}{\mbox{\bm $K$}} \newcommand{\bmk}{\mbox{\bm $k$}}
\newcommand{\bmL}{\mbox{\bm $L$}} \newcommand{\bml}{\mbox{\bm $l$}}
\newcommand{\bmM}{\mbox{\bm $M$}} \newcommand{\bmm}{\mbox{\bm $m$}}
\newcommand{\bmN}{\mbox{\bm $N$}} \newcommand{\bmn}{\mbox{\bm $n$}}
\newcommand{\bmO}{\mbox{\bm $O$}} \newcommand{\bmo}{\mbox{\bm $o$}}
\newcommand{\bmP}{\mbox{\bm $P$}} \newcommand{\bmp}{\mbox{\bm $p$}}
\newcommand{\bmQ}{\mbox{\bm $Q$}} \newcommand{\bmq}{\mbox{\bm $q$}}
\newcommand{\bmR}{\mbox{\bm $R$}} \newcommand{\bmr}{\mbox{\bm $r$}}
\newcommand{\bmS}{\mbox{\bm $S$}} \newcommand{\bms}{\mbox{\bm $s$}}
\newcommand{\bmT}{\mbox{\bm $T$}} \newcommand{\bmt}{\mbox{\bm $t$}}
\newcommand{\bmU}{\mbox{\bm $U$}} \newcommand{\bmu}{\mbox{\bm $u$}}
\newcommand{\bmV}{\mbox{\bm $V$}} \newcommand{\bmv}{\mbox{\bm $v$}}
\newcommand{\bmW}{\mbox{\bm $W$}} \newcommand{\bmw}{\mbox{\bm $w$}}
\newcommand{\bmX}{\mbox{\bm $X$}} \newcommand{\bmx}{\mbox{\bm $x$}}
\newcommand{\bmY}{\mbox{\bm $Y$}} \newcommand{\bmy}{\mbox{\bm $y$}}
\newcommand{\bmZ}{\mbox{\bm $Z$}} \newcommand{\bmz}{\mbox{\bm $z$}}
\newcommand{\bmnabla}{\mbox{\bm $\nabla$}}

\newcommand{\rg}{r_{\rm g}}
\newcommand{\rin}{r_{\rm in}}

\begin{document}
%escape

\baselineskip 14pt

\LARGE

$$
4\pi R_*^2 \sigma T_*^4 = 4\pi r^2 \sigma T_{\rm in}^4
$$

$$
\sigma T_*^4 = \sigma T^4 + \sigma T_{\rm out}^4
$$

$$
T = \left( \frac{R_*^2}{r^2}T_*^4 - T_{\rm out}^4 \right)^{1/4}
$$


\end {document}

