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Detailed Description of VI/98A
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Individual files can be fetched (via http) from
here
or via ftp from: ftp://cdsarc.u-strasbg.fr/pub/cats/VI/98A
This standardized document follows the rules of the Standard Description for Astronomical Catalogues. For those having to work on this catalogue using FORTRAN programs, this ReadMe file can be transformed into a f77-compliant program which reads the files making up this catalogue, in two versions: either a f77 program loading whole files into arrays, or a f77-program reading each data file line by line.
VI/98A Stark broadening of H lines (Stehle+, 1999)
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Extensive tabulations of Stark broadened hydrogen line profiles
Stehle C., Huucheon R.
<Astron. Astrophys. Suppl. Ser. 140, 93 (1999)>
=1999A&AS..140...93S
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ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - lines profiles
Description:
New tables of Stark broadened hydrogen Lyman, Balmer and Paschen
lines are presented for a wide range of plasma conditions, allowing
the complete spectrum of these series to be modelled up to the Inglis
Teller limit. The formalism, based on the Model Microfield Method
(MMM) for both the electronic and ionic broadenings , gives an
accurate description of the line profile from the centre to the wings.
The profiles are calculated for a pure hydrogen plasma.
All the transitions from n_lower = 1 (Lyman), 2(Balmer), 3(Paschen)
to n_upper= (2 to 30) Lyman, (3 to 30) Balmer, (4 to 30) Paschen
are reported.
The temperature range is 2500 to 1.259E+06 K (10 temperatures)
The electronic density range is 10e10 to 3.162E+19 (20 densities)
A summary of the parameter values is reported in file "params.dat".
The line profiles are tabulated in directories:
ly/lyNN for Lyman lines, with NN = 02 .. 30
ba/baNN for Balmer lines, with NN = 03 .. 30
pa/paNN for Paschen lines, with NN = 04 .. 30
Each TRANSITION directory (for example ly/ly02, for Lyman{alpha})
contains at maximum 20 files, denoted by profilX.dat, ie, profil1.dat,
..., profil20.dat, which correspond to different increasing densities.
Due to the plasma lowering of the ionization limit (Inglis Teller
limit), the number of reported density calculations decreases when NN
increases. The number of density files profilX.dat is reported for
each transition directory in the file nraie.dat.
File Summary:
FileName Lrecl Records Explanations
× ReadMe 80 . This file
× params.dat 85 7922 Summary of physical parameters
× read_gen.f 100 796 Interpolation Fortran90 program to compute the
line profiles at a given temperature,density
× ly/* 0 29 Lyman lines (lower number = 1)
× ba/* 0 28 Balmer lines (lower number = 2)
× pa/* 0 27 Paschen lines (lower number = 3)
Byte-by-byte Description of file: params.dat
Bytes Format Units Label Explanations
1- 2 I2 --- lower [1/3] Lower state
(1=Lyman, 2=Balmer, 3=Paschen)
4- 5 I2 --- upper [2/30] Upper state (upper > lower)
7- 14 F8.2 0.1nm lambda0 Wavelength of the line center
16- 24 E9.3 --- Kalpha Asymptotic value of iStark*(alpha2.5)
26- 34 E9.3 cm-3 Ne Electron density
36- 44 E9.3 30kV/m E0 *Dlambda/Dalpha = E0, normal Holtsmark
field strength
46- 54 E9.3 K T Temperature
56- 64 E9.3 --- R0/Debye *Ratio of the mean interelectronic distance
to the electronic Debye length
66- 85 A20 --- FileName Name of the file detailing the profile
Note on E0: the normal Holstmark electric field strength is:
E0 = e * (4*pi/3) * Ne(2/3)
Its value is (in ues-cgs electric field units uesVolts/cm):
E0 = 1.25E-9 * Ne(2/3) in CGS-ues units (Ne expressed in cm-3)
Note on R0/Debye: the Debye length is
Debye = sqrt(eps0*k*T/Ne)/e (eps0 = dielectric constant)
= 6.92 sqrt(T/Ne) cm (CGS units, Ne in cm-3)
= 69.2 sqrt(T/Ne) m (SI units, Ne in m-3)
The ratio R0/Debye is: 0.0898 (Ne(1/6))/(T(1/2))
Description of files: */*/profil*.dat
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Each of these files contains a maximum of 10 profiles (with and
without Doppler convolution) for 10 plasma temperatures. T1, T2, ...
T10. The header lines are:
line 1 : n_lower , n_upper, wavelength of the transition (Angstroms)
line 2 : electronic density in cm-3
line 3 : D{lambda}/D{alpha} = E0, normal Holtsmark field strength
(see the "Note on E0" section above)
line 4 : Asymptotic value of iStark*({alpha}2.5)
line 5 : blank
line 6 : Temperature in K ( T1,T2,T3, then T4,T5,T6,then T7,T8,T9, then T10)
line 7 : R0/Debye Ratio (see the "Note on R0/Debye" section above)
line 8 : HHWM of the line (without Doppler broadening)
line 9 : " " " " (with " )
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The 7 columns contain:
column 1 : Dalpha = Detuning from central wavelength, expressed in units
of {alpha} = lambda0 / E0 where
lambda0 is the unperturbed wavelength (in Å = 0.1nm) and
E0 is the normal Holstmark electric field in uesVolts/cm
column 2 : iDoppler = Intensity with Doppler (convolved) for T1
in units of 1/{alpha}
column 3 : iStark = Intensity with Stark only (in brackets) for T1
in units of 1/{alpha}
column 4 : iDoppler (convolved) for T2
column 5 : iStark (in brackets) for T2
column 6 : iDoppler (convolved) for T3
column 7 : iStark (in brackets) for T3
Description of program: read_gen.f
This program should be run in the directory related to a specific
transition (e.g. in directory ly/ly02 for Lyman{alpha}).
The input to this program consists in:
1. Temperature (K) Example: 10000
2. Electronic density (cm-3) Example: 1.e14
The output of this program consists in four columns with:
Column 1: wavelength distance from line centre (Å = 0.1nm)
Column 2: frequency distance from line centre (in Hz)
Column 3: iDoppler (intensity convolved with Doppler) in s (seconds)
Column 3: iStarck (intensity without convolution) in s (seconds)
Acknowledgements:
Chantal Stehle
History:
This catalog supersedes the previous version (VI/82)
* 18-Sep-2000: a corrected version of the following files was introduced:
ly/ly02/profil17.dat ly/ly03/profil17.dat ba/ba04/profil16.dat
read_gen.f (one line changed)
* 28-Aug-2001: a few corrections in the reading program (read_gen.f)
* 23-Nov-2007: paschen parameters (files pa/*) corrected
(from Chantal Stehle). Original files kept as pa.ori
* 14-Jan-2008: improved version of the interpolation program.
References:
Brissaud A., Frisch U., 1971, J. Quant. Spectrosc. Radiat. Transfer 11, 1767
Frisch U., Brissaud A., 1971, J. Quant. Spectrosc. Radiat. Transfer 11, 1753
Vidal C.R., Cooper J., Smith E.W., 1973ApJS...25...37V
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(End) Francois Ochsenbein, Patricia Bauer [CDS] 14-Jun-1999
