VI/82 Stark broadening of H lines (Stehle 1995)
Stark broadening of Hydrogen lines in the conditions of stellar envelopes
Stehle C.
<Astron. Astrophys. Suppl. Ser. 104, 509 (1994)>
=1994A&AS..104..509S 1994A&AS..104..509S
<Vienna International Workshop on Model Atmospheres and Spectrum
syntheses for mid-B to mid-G stars, at or close to the Main Sequence,
(July 6 to July 11 1995) (to be published in Conferences Series of ASP)>
ADC_Keywords: Atomic physics
Keywords: atomic data - atomic processes - lines profiles
Description:
Tables of Stark broadened hydrogen lines of the Lyman, Balmer and
Paschen series are presented under the conditions of stellar
envelopes. The formalism is based on the Model Microfield Method (MMM)
(Brissaud and Frisch, Frisch and Brissaud 1971) for both the
electronic and ionic contributions to the line shape.
The range of temperatures is 10000 to 80000 K, and electronic
densities between 3.2E+14 and 3.2E+16 cm-3.
Lyman and Balmer results were published in A&AS 104, 509,
whereas Paschen results were presented at the 1995 July Workshop
in Vienna.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
h.dat 94 12770 Stark effect with H+ perturbers
he.dat 94 4526 Stark effect with He+ perturbers
ar.dat 94 4526 Stark effect with Ar+ perturbers
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Byte-per-byte Description of file: h.dat he.dat ar.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- lower [1/3] Lower state
(1=Lyman, 2=Balmer, 3=Paschen)
3- 4 I2 --- upper [2/17] Upper state (upper > lower)
6- 14 F9.2 0.1nm lambda0 Wavelength of the line center
16- 24 E9.3 --- Kalpha Asymptotic value of iStark*(alpha^2.5)
26- 34 E9.3 cm-3 Ne Electron density
36- 44 E9.3 30kV/m E0 Dlambda/Dalpha = E0, normal Holtsmark
field strength (1)
46- 54 E9.3 K T Temperature
56- 64 E9.3 --- R0/Debye Ratio of the mean interelectronic distance
to the electronic Debye length (2)
66- 74 E9.3 "alpha" Dalpha Detuning from central wavelength (3)
76- 84 E9.3 1/"alpha" iDoppler Intensity with Doppler (convolved)
86- 94 E9.3 1/"alpha" iStark Intensity with Stark only
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Note (1): 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 (2): 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))
Note (3): The unit "alpha" is defined by
"alpha" = lambda0 / E0
where lambda0 is the unperturbed wavelength (in Angstroems = 0.1nm),
E0 is the normal Holstmark electric field in uesVolts/cm
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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., 1973, ApJS 25, 37
Author's Address:
Chantal Stehle
(End) Francois Ochsenbein [CDS] 30-Sep-1995