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\begin{document}

%\thesaurus{06         % A&A Section 6: Form. struct. and evolut. of
%stars
%               ( 08.03.5;08.12.1;08.09.2 kCet;13.21.5)}

\title{A comparison between theoretical and solar \ion[Fe xii] UV
line intensity ratios}

\author{A.M.Binello
\inst{1}
\and E. Landi
\inst{2}
\and H.E.Mason
\inst{1}
\and P.J.Storey
\inst{3}
\and J.W. Brosius
\inst{4}
      }

\institute
{Department of Applied Mathematics and Theoretical Physics, University
of Cambridge, UK
\and Naval Research Laboratory, Washington DC, 20375, USA
\and
Department of Physics and Astronomy, University College London,
Gower Street, London WC1E 6BT, UK
\and Raytheon ITSS, Laboratory for Astronomy and Solar Physics, Code
682.1, NASA's Goddard Space Flight Center, Greenbelt, MD, 20771
     }

\offprints{E.Landi-landi@poppeo.nrl.navy.mil}

\authorrunning{Binello \etal}
\titlerunning{A comparison between \ion[Fe xii] ...}

\abstract{
A new set of radiative and electron collisional
data for {\fe} was presented in two earlier papers.
In the present work, we derive level populations and theoretical
line intensities for a range of plasma densities and temperatures.
Observations of {\fe} lines obtained with the
{\em Solar EUV Rocket Telescope and Spectrograph}
are analysed both as a
check on the quality of the new atomic data and
to determine the electron density in active regions
and the quiet Sun.
The discrepancy between the electron density values
determined from \ion[Fe xii] line intensity ratios and
those obtained from other ions is investigated.
\keywords{Sun -- atomic data -- UV spectrum -- plasma diagnostics} }

\maketitle

\setcounter{table}{+1}
\begin{table}
\begin{center}
\begin{tabular}{lcc}
\hline
Transition & Wavelengths & A \\
({\conb}$\to$ {\cona}) & (\AA) & (sec$^{-1}$) \\
\hline
{\lvf} -- {\lva} & 364.47 & 1.589\,(9)\\
{\lvg} -- {\lva} & 352.11 & 1.728\,(9)\\
{\lvh} -- {\lva} & 346.85 & 1.814\,(9)\\
{\lvi} -- {\lva} & 294.33 & 3.834\,(6)\\
{\lvl} -- {\lva} & 292.65 & 7.599\,(6)\\
{\lvm} -- {\lva} & 256.63 & 4.124\,(7)\\
{\lvn} -- {\lva} & 253.58 & 3.877\,(7)\\
{\lvo} -- {\lva} & 243.66 & 7.977\,(7)\\
{\lvf} -- {\lvb} & 429.52 & 1.156\,(7)\\
{\lvg} -- {\lvb} & 412.46 & 8.332\,(5)\\
{\lvh} -- {\lvb} & 405.27 & 4.818\,(6)\\
{\lvi} -- {\lvb} & 335.34 & 3.330\,(9)\\
{\lvl} -- {\lvb} & 333.17 & 3.260\,(7)\\
{\lvm} -- {\lvb} & 287.26 & 8.917\,(8)\\
{\lvn} -- {\lvb} & 283.45 & 7.272\,(9)\\
{\lvo} -- {\lvb} & 271.12 & 2.948\,(8)\\
{\lvf} -- {\lvc} & 430.05 & 2.132\,(7)\\
{\lvg} -- {\lvc} & 420.32 & 3.916\,(6)\\
{\lvi} -- {\lvc} & 340.51 & 4.769\,(7)\\
{\lvl} -- {\lvc} & 338.28 & 2.759\,(9)\\
{\lvm} -- {\lvc} & 291.05 & 7.561\,(9)\\
{\lvg} -- {\lvd} & 476.42 & 1.124\,(5)\\
{\lvh} -- {\lvd} & 466.86 & 8.777\,(6)\\
{\lvi} -- {\lvd} & 376.43 & 2.838\,(8)\\
{\lvm} -- {\lvd} & 316.90 & 3.686\,(8)\\
{\lvn} -- {\lvd} & 312.26 & 3.231\,(9)\\
{\lvo} -- {\lvd} & 297.36 & 1.001\,(9)\\
{\lvf} -- {\lve} & 515.84 & 2.094\,(6)\\
{\lvg} -- {\lve} & 491.43 & 9.149\,(6)\\
{\lvh} -- {\lve} & 481.25 & 1.382\,(6)\\
{\lvi} -- {\lve} & 385.73 & 1.241\,(7)\\
{\lvl} -- {\lve} & 382.87 & 5.535\,(8)\\
{\lvm} -- {\lve} & 323.46 & 6.773\,(8)\\
{\lvn} -- {\lve} & 318.64 & 1.231\,(7)\\
{\lvo} -- {\lve} & 303.14 & 7.252\,(9)\\
\noalign{\smallskip}
\hline
\end{tabular}
\end{center}
\caption{Spontaneous transition probabilities for all electric
dipole fine structure transitions between the ground {\cona} and the
first excited {\conb} configurations in {\fe}. Numbers in
parenthesis are powers of 10. Wavelengths are taken from CHIANTI
(Dere \etal 1997, Landi \etal 1999).}
\label{dipole1}
\end{table}

\clearpage

\begin{table*}
\begin{center}
\begin{tabular}{lclllcl}
\hline
Transition & Wavelength & A & & Transition & Wavelength & A \\
({\conc}$\to$ {\cona}) & (\AA) & (s$^{-1}$) & & ({\conc}$\to$ {\cona}) & (\AA) & (s$^{-1}$) \\
\hline
{\lvp} -- {\lva} & {\it 237.95} & 1.399\,(7) & & {\lvB} -- {\lvc}$^a$
& {\it 244.02} & 7.315\,(3)\\
{\lvq} -- {\lva} & {\it 235.84} & 2.717\,(7) & & {\lvC} -- {\lvc} &
{\it 224.31} & 2.212\,(8)\\
{\lvt} -- {\lva} & {\it 228.73} & 1.016\,(8) & & {\lvE} -- {\lvc} &
{\it 219.44} & 4.540\,(10)\\
{\lvu} -- {\lva} & {\it 227.11} & 6.299\,(7) & & {\lvF} -- {\lvc} & 214.40 & 1.292\,(9)\\
{\lvz} -- {\lva} & {\it 226.55} & 2.581\,(8) & & {\lvH} -- {\lvc} & 212.47 & 2.829\,(8)\\
{\lvA} -- {\lva} & {\it 224.19} & 2.767\,(8) & & {\lvL} -- {\lvc} & 208.32 & 6.089\,(9)\\
{\lvE} -- {\lva} & 199.28 & 2.406\,(8) & & {\lvM} -- {\lvc} &  203.27 & 3.080\,(10)\\
{\lvF} -- {\lva} & 195.12 & 8.638\,(10) & & {\lvN} -- {\lvc} & 196.87 & 9.306\,(9)\\
{\lvG} -- {\lva} & 194.61 & 5.086\,(9) & & {\lvO} -- {\lvc} & 196.65 & 4.070\,(10)\\
{\lvH} -- {\lva} & 193.52 & 8.901\,(10) & & {\lvQ} -- {\lvc} & 188.45 & 5.721\,(9)\\
{\lvI} -- {\lva} & 192.39 & 8.807\,(10) & & {\lvS} -- {\lvc} & 188.09 & 5.617\,(8)\\
{\lvL} -- {\lva} & 190.07 & 2.955\,(9) & & {\lvT} -- {\lvc} & 186.88 & 1.067\,(11)\\
{\lvM} -- {\lva} & 185.86 & 2.563\,(9) & & {\lvU} -- {\lvc} & 179.26 & 4.552\,(9)\\
{\lvN} -- {\lva} & 180.50 & 2.536\,(5) & & {\lvV} -- {\lvc} & 178.77 & 2.169\,(8)\\
{\lvO} -- {\lva} & 180.31 & 6.934\,(7) & & {\lvp} -- {\lvd} & {\it 288.89} & 1.585\,(7)\\
{\lvP} -- {\lva} & 175.77 & 4.606\,(7) & & {\lvu} -- {\lvd} & {\it 273.07} & 3.259\,(7)\\
{\lvQ} -- {\lva} & 193.39 & 3.300\,(8) & & {\lvz} -- {\lvd} & {\it 272.35} & 6.624\,(6)\\
{\lvS} -- {\lva} & 173.09 & 5.912\,(7) & & {\lvE} -- {\lvd} & 233.81 & 1.419\,(9)\\
{\lvR} -- {\lva} & 172.52 & 1.074\,(5) & & {\lvG} -- {\lvd} & 227.41 & 8.293\,(9)\\
{\lvU} -- {\lva} & 165.58 & 3.866\,(8) & & {\lvH} -- {\lvd} & 225.92 & 6.352\,(6)\\
{\lvV} -- {\lva} & 165.12  & 7.179\,(7) & & {\lvI} -- {\lvd} & 224.39 & 4.868\,(8)\\
{\lvp} -- {\lvb} & {\it 264.06} & 1.417\,(8) & & {\lvL} -- {\lvd} & 221.23 & 1.003\,(8)\\
{\lvq} -- {\lvb} & {\it 261.45} & 1.641\,(7) & & {\lvN} -- {\lvd} & 208.37 & 6.636\,(9)\\
{\lvt} -- {\lvb} & {\it 252.76} & 8.246\,(5) & & {\lvP} -- {\lvd} & 202.09 & 6.422\,(10)\\
{\lvu} -- {\lvb} & {\it 250.78} & 3.738\,(8) & & {\lvS} -- {\lvd} & 198.56 & 1.850\,(10)\\
{\lvz} -- {\lvb} & {\it 250.09} & 6.449\,(5) & & {\lvR} -- {\lvd} & 197.82 & 5.149\,(8)\\
{\lvA} -- {\lvb} & {\it 247.22} & 2.377\,(6) & & {\lvV} -- {\lvd} & 188.19 & 7.028\,(10)\\
{\lvE} -- {\lvb} & 217.28 & 1.855\,(10) & & {\lvp} -- {\lve} & {\it 294.34} & 1.055\,(6)\\
{\lvF} -- {\lvb} & 212.34 & 3.433\,(8) & & {\lvq} -- {\lve} & {\it 291.12} & 9.382\,(6)\\
{\lvG} -- {\lvb} & 211.73 & 4.323\,(10) & & {\lvt} -- {\lve} & {\it 280.36} & 5.128\,(6)\\
{\lvH} -- {\lvb} & 210.44 & 2.251\,(8) & & {\lvu} -- {\lve} & {\it 277.93} & 1.379\,(8)\\
{\lvI} -- {\lvb} & 209.11 & 4.060\,(9) & & {\lvz} -- {\lve} & {\it 277.09} & 2.499\,(7)\\
{\lvL} -- {\lvb} & 206.37 & 9.166\,(9) & & {\lvA} -- {\lve} & {\it 273.57} & 2.479\,(6)\\
{\lvM} -- {\lvb} & 201.42 & 7.277\,(8) & & {\lvE} -- {\lve} & 237.37 & 4.585\,(9)\\
{\lvN} -- {\lvb} & 195.13 & 5.712\,(10) & & {\lvF} -- {\lve} & 231.48 & 2.026\,(6)\\
{\lvO} -- {\lvb} & 194.91 & 2.271\,(9) & & {\lvG} -- {\lve} & 230.77 & 1.422\,(10)\\
{\lvP} -- {\lvb} & 189.62 & 2.064\,(9) & & {\lvH} -- {\lve} & 229.24 & 1.397\,(8)\\
{\lvQ} -- {\lvb} & 186.85 & 1.002\,(11) & & {\lvI} -- {\lve} & 227.66 & 5.717\,(8)\\
{\lvS} -- {\lvb} & 186.50 & 1.423\,(9) & & {\lvL} -- {\lve} & 224.41 & 2.939\,(8)\\
{\lvR} -- {\lvb} & 185.85 & 8.178\,(9) & & {\lvM} -- {\lve} & 218.57 & 2.978\,(9)\\
{\lvU} -- {\lvb} & 177.82 & 7.159\,(7) & & {\lvN} -- {\lve} & 211.19 & 2.913\,(8)\\
{\lvV} -- {\lvb} & 177.33 & 2.814\,(8) & & {\lvO} -- {\lve} & 210.93 & 4.270\,(9)\\
{\lvp} -- {\lvc} & {\it 267.26} & 1.532\,(6) & & {\lvP} -- {\lve} & 204.74 & 5.724\,(8)\\
{\lvq} -- {\lvc} & {\it 264.60} & 4.171\,(7) & & {\lvQ} -- {\lve} &
{\it 201.52} & 2.252\,(8)\\
{\lvr} -- {\lvc} & {\it 260.80} & 2.091\,(7) & & {\lvS} -- {\lve} & 201.12 & 4.989\,(10)\\
{\lvt} -- {\lvc}$^a$ & {\it 255.69} & 4.992\,(3) & & {\lvR} -- {\lve} & 200.36 & 6.209\,(10)\\
{\lvv} -- {\lvc} & {\it 253.26} & 2.886\,(7) & & {\lvU} -- {\lve} & 191.05 & 9.023\,(10)\\
{\lvz} -- {\lvc} & {\it 252.96} & 3.048\,(8) & & {\lvV} -- {\lve} & 190.49 & 2.220\,(10)\\
{\lvA} -- {\lvc} & {\it 250.02} & 8.309\,(7)\\
\noalign{\smallskip}
\hline
\end{tabular}
\end{center}
\caption{Spontaneous transition probabilities for all electric
dipole fine structure transitions between the ground {\cona} and the
second excited {\conc} configurations in {\fe}. 
the numbers in parenthesis in the column of A values 
are powers of 10. For $^a$ see text. 
Wavelengths are taken from the CHIANTI database (Dere \etal (1997),
Landi \etal (1999)).
Wavelengths in italics are calculated 
from theoretical energy levels, as no experimental energy is available.}
\label{dipole2}
\end{table*}

\clearpage

\begin{table}
\begin{center}
\begin{tabular}{lrcl}
\hline
Transition & Wavelength & Transition & A            \\
           & (\AA)      & type       & (sec$^{-1}$) \\
\hline
{\lvb} -- {\lva} &  2406.45 & M1 & 4.419\,(1)\\
{\lvc} -- {\lva} &  2169.76 & M1 & 1.826\,(0)\\
{\lvd} -- {\lva} &  1349.38 & M1 & 1.665\,(2)\\
{\lve} -- {\lva} &  1242.01 & M1 & 3.214\,(2)\\
{\lvc} -- {\lvb} & 22060.45 & M1 & 8.945\,(-1)\\
{\lvd} -- {\lvb} &  3071.91 & M1 & 6.427\,(1)\\
{\lve} -- {\lvb} &  2566.74 & M1 & 1.799\,(2)\\
{\lvd} -- {\lvc} &  3568.88 & E2 & 2.971\,(-1)\\
{\lve} -- {\lvc} &  2904.70 & M1 & 7.277\,(1)\\
{\lve} -- {\lvd} & 15607.93 & M1 & 2.069\,(0)\\
\noalign{\smallskip}
\hline
\end{tabular}
\end{center}
\caption{Spontaneous transition probabilities for the 10 optically
forbidden fine structure transitions within the ground {\cona}
configuration of {\fe}. Numbers in parenthesis are powers of 10.
The wavelengths are from CHIANTI.}
\label{forbidden}
\end{table}


\begin{table}
\begin{center}
\begin{tabular}{ll}
\hline
Transition & A\\
           &  (sec$^{-1}$) \\
\hline
 {\conc} {\lvs} -- {\cona} {\lvc} & 2.759(1)\\
 {\conc} {\lvs} -- {\conb} {\lvf} & 4.451(1)\\
 {\conc} {\lvs} -- {\conb} {\lvl} & 1.422(-1)\\
 {\conc} {\lvs} -- {\conc} {\lvq} & 5.068(-5)\\
 {\conc} {\lvs} -- {\conc} {\lvr} & 8.168(0)\\
 {\conc} {\lvs} -- {\conc} {\lvs} & 5.916(-15)\\
 {\conc} {\lvD} -- {\cona} {\lvc} & 2.178(1)\\
 {\conc} {\lvD} -- {\conb} {\lvf} & 7.614(0)\\
 {\conc} {\lvD} -- {\conb} {\lvl} & 1.494(1)\\
 {\conc} {\lvD} -- {\conc} {\lvq} & 8.834(-2)\\
 {\conc} {\lvD} -- {\conc} {\lvr} & 6.249(1)\\
 {\conc} {\lvD} -- {\conc} {\lvs} & 1.188(2)\\
 {\conc} {\lvD} -- {\conc} {\lvt} & 1.266(-5)\\
 {\conc} {\lvD} -- {\conc} {\lvv} & 4.459(0)\\
 {\conc} {\lvD} -- {\conc} {\lvA} & 3.454(-4)\\
 {\conc} {\lvD} -- {\conc} {\lvB} & 9.599(0)\\
 {\conc} {\lvD} -- {\conc} {\lvC} & 2.783(-1)\\
\noalign{\smallskip}
\hline
\end{tabular}
\end{center}
\caption{Spontaneous transition probabilities from the 
metastable levels in {\conc} of {\fe}. 
Numbers in parenthesis are powers of 10.}
\label{metastable}
\end{table}

\end{document}
\end{document}
