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subroutine ewfind
c******************************************************************************
c This routine predicts equivalent widths for individual atomic lines
c******************************************************************************
implicit real*8 (a-h,o-z)
include 'Atmos.com'
include 'Linex.com'
include 'Mol.com'
include 'Pstuff.com'
include 'Dummy.com'
real*8 taunu0(100)
character*4 ion(3)
data ion/' I ', ' II ', ' III'/
c*****read the parameter file
call params
c*****open the files for standard output and summary curves-of-growth
nf1out = 20
lscreen = 4
array = 'STANDARD OUTPUT'
nchars = 15
call infile ('output ',nf1out,'formatted ',0,nchars,
. f1out,lscreen)
nf2out = 21
lscreen = lscreen + 2
array = 'SUMMARY PREDICTED EW OUTPUT'
nchars = 27
call infile ('output ',nf2out,'formatted ',0,nchars,
. f2out,lscreen)
c*****open and read the model atmosphere
nfmodel = 30
lscreen = lscreen + 2
array = 'THE MODEL ATMOSPHERE'
nchars = 20
call infile ('input ',nfmodel,'formatted ',0,nchars,
. fmodel,lscreen)
call inmodel
c*****open and read the line list file; get ready for the line calculations
nflines = 31
lscreen = lscreen + 2
array = 'THE LINE LIST'
nchars = 13
call infile ('input ',nflines,'formatted ',0,nchars,
. flines,lscreen)
call inlines (1)
call eqlib
call nearly (1)
c*****set some parameters and write header stuff to output
ewsynthopt = +1
mode = 1
call linlimit
lim1obs = lim1line
lim2obs = lim2line
istat = ivcleof (4,1)
write (nf2out,1002) linitle,moditle
c*****run single line computations once to predict the EW for each line
do lim1=lim1line,lim2line
array(1:40) = 'wavelength EP logGF ident'
array(41:60) = ' Abund EWcalc'
lscreen = lscreen + 2
c call prinfo (lscreen)
write (nf2out,1001)
ncurve = lim1
lim2 = lim1
gf1(ncurve) = gf(lim1)
call oneline (1)
widout(lim1) = w(ncurve)
iatom = atom1(lim1)
xab = dlog10(xabund(iatom)) + 12.
ich = idint(charge(lim1) + 0.1)
if (iatom < 100) then
write (array,1003) wave1(lim1), e(lim1,1),
. dlog10(gf(lim1)), names(iatom),
. ion(ich), xab, 1000.*widout(lim1)
lscreen = lscreen + 2
c call prinfo (lscreen)
write (nf2out,1003) wave1(lim1), e(lim1,1),
. dlog10(gf(lim1)), names(iatom),
. ion(ich) ,xab, 1000.*widout(lim1)
else
write (array,1004) wave1(lim1), e(lim1,1),
. dlog10(gf(lim1)), atom1(lim1),
. xab, 1000.*widout(lim1)
lscreen = lscreen + 2
c call prinfo (lscreen)
write (nf2out,1004) wave1(lim1), e(lim1,1),
. dlog10(gf(lim1)), atom1(lim1),
. xab, 1000.*widout(lim1)
endif
c*****(re)compute the line optical depth at line center and the C_d curve
do i=1,ntau
kapnu(i) = kapnu0(lim1,i)
dummy1(i) = tauref(i)*kapnu(i)/(0.4343*kapref(i))
enddo
first = tauref(1)*kapnu(1)/kapref(1)
dummy2(1) = rinteg(xref,dummy1,taunu0,ntau,0.)
taunu0(1) = first
do i=1,ntau
taunu(i) = taunu0(i)
enddo
call cdcalc (2)
do i=2,ntau
taunu0(i) = taunu0(i-1) + taunu0(i)
enddo
write (nf2out,1010)
write (nf2out,1011) (i, rhox(i), xref(i), int(t(i)),
. pgas(i), rho(i), xdepth(i), taulam(i),
. taunu0(i), cd(i), i=1,ntau)
c*****compute layer where continuum optical depth > 1
do i=1,ntau
if (taulam(i) >= 1.) then
xdepthlam1 = xdepth(i-1) + (1.-taulam(i-1))*
. (xdepth(i)-xdepth(i-1))/(taulam(i)-taulam(i-1))
write (nf2out,1013) int(xdepthlam1), i
go to 10
endif
enddo
c compute layer where line center optical depth > 1
10 if (taunu0(ntau) < 1.) then
write (nf2out,1016)
go to 20
endif
do i=1,ntau
if (taunu0(i) >= 1.) then
xdepthnu01 = xdepth(i-1) + (1.-taunu0(i-1))*
. (xdepth(i)-xdepth(i-1))/(taunu0(i)-taunu0(i-1))
write (nf2out,1014) int(xdepthnu01), i
go to 20
endif
enddo
c compute layer where line center plus continuum optical depth > 1
20 do i=1,ntau
if (taunu0(i)+taulam(i) >= 1.) then
tautot1 = taulam(i-1) + taunu0(i-1)
tautot2 = taulam(i) + taunu0(i)
xdepthtot1 = xdepth(i-1) + (1.-tautot1)*
. (xdepth(i)-xdepth(i-1))/(tautot2-tautot1)
write (nf2out,1015) int(xdepthtot1), i
go to 30
endif
enddo
*****compute mean line-center formation level (weight: contribution function)
30 do i=1,ntau
dummy1(i) = xref(i)*dabs(cd(i))
enddo
xrefcdinteg = rinteg(xref,dummy1,dummy2,ntau,0.)
do i=1,ntau
dummy1(i) = dabs(cd(i))
enddo
cdinteg = rinteg(xref,dummy1,dummy2,ntau,0.)
xrefmean = xrefcdinteg/cdinteg
do i=1,ntau
if (xrefmean <= xref(i)) then
xdepthxrefmean = xdepth(i-1) + (xrefmean-xref(i-1))*
. (xdepth(i)-xdepth(i-1))/(xref(i)-xref(i-1))
write (nf2out,1017) int(xdepthxrefmean), i, tauref(i),
. taulam(i)
go to 40
endif
enddo
40 continue
enddo
c*****end the abundance computations
call finish (0)
return
c*****format statements
1001 format (/'wavelength EP logGF ident',
. ' Abund EWcalc')
1002 format (a80)
1003 format (f10.2,f10.2,f10.3,' ',a2,a3,f10.2,f10.1)
1004 format (f10.2,f10.2,f10.3,a10,f10.2,f10.1)
1010 format (' i', 2x, 'rhox', 5x, 'xref', 5x, 'T', 5x, 'Pgas',
. 6x, 'rho', 8x, 'X', 3x, 'taulam', 3x, 'taunu0',
. 8x, 'Cd')
1011 format (i3, 1pe9.2, 0pf6.2, i6, 1p5e9.2, e10.2)
1013 format (i7, 'km (layer ~', i3, ') = physical depth',
. ' for tau(cont) ~ 1')
1014 format (i7, 'km (layer ~', i3, ') = physical depth',
. ' for tau(line center) ~ 1')
1015 format (i7, 'km (layer ~', i3, ') = physical depth',
. ' for tau(cont)+tau(line center) ~ 1')
1016 format (7x,' NOTE: tau(line center) < 1 at deepest',
. ' atmosphere layer')
1017 format (i7, 'km (layer ~', i3, ') = line center ',
. 'formation mean depth; C_d weight'/
. 25x, 'where tauref, taulam =', 2f8.3)
end
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