J/MNRAS/448/2332 Hydrogen Lyman and Balmer line profiles (Pelisoli+, 2015)
Unified line profiles for hydrogen perturbed by collisions with protons: satellites and asymmetries. Pelisoli I., Santos M.G., Kepler S.O. <Mon. Not. R. Astron. Soc., 448, 2332-2343 (2015)> =2015MNRAS.448.2332P (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics ; Line Profiles ; Photometry, hydrogen-line ; Balmer lines Keywords: atomic data - line: profiles - white dwarfs Abstract: We present new calculations of unified line profiles for hydrogen perturbed by collisions with protons. We report on new calculations of the potential energies and dipole moments which allow the evaluation of profiles for the lines of the Lyman series up to Lyman δ and the Balmer series up to Balmer 10. Unified calculations only existed for the lines Lyman α to Lyman γ and Balmer α including the H2+ quasi-molecule. These data are available as online material accompanying this paper and should be included in atmosphere models, in place of the Stark effect of protons, since the quasi-molecular contributions cause not only satellites, but large asymmetries that are unaccounted for in models that assume that Stark broadening of electrons and that of protons are equal. Description: There are basically four possible approaches for the calculation of collisional profiles: the impact theory, the quasi-static approximation (statistical theory), the unified theory and the quantum method. We chose the unified theory as proposed by Allard et al. (1999PhRvA..60.1021A) to the evaluations in this work. Calculations via unified theory existed in the literature only for Lyman α (Allard et al. 2004A&A...424..347A), Lyman β (Allard et al. 1998A&A...330..782A), Lyman γ (Allard et al. 2009A&A...506..993A) and Balmer α (Kielkopf et al. 2002EPJD...18...51K). For the other lines, calculations were done only by Santos & Kepler (2012MNRAS.423...68S), but via the quasi-static approach. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tables1.dat 47 2103323 Profiles for the lines of the Lyman and Balmer series tables2.dat 69 5576 *Profiles already at an adequate format to be read by the SYNSPEC code, with 697 data lines and log(NH+)=17
Note on tables2.dat: The SYNSPEC code (Hubeny & Lanz, 2011ascl.soft09022H).
See also: II/63 : Balmer Lines Photometric Data (Mermilliod+ 1980) VI/98 : Stark broadening of H lines (Stehle+, 1999) Byte-by-byte Description of file: tables1.dat
Bytes Format Units Label Explanations
1 I1 --- ni [1/2] Initial atomic state 3- 4 I2 --- nf [2/10] Final atomic state 6- 10 I5 K T [10000/25000] Temperature 12- 13 I2 [cm-3] log(NH+) [16/18] Log of perturber density 15- 22 F8.3 0.1nm lambda Wavelength (Å) 24- 34 E11.6 --- Ilambda1 Intensity at lambda (I(λ)) (1) 36- 47 E12.6 --- Ilambda2 Intensity at lambda (I(λ)) (2)
Note (1): Considering the conversion : I(λ)=2*iπ*clight*I(ω)/(λc*λc), where λc is the central wavelength. Should be use to implementation in model spectra codes, because they assume a constant aλ=aω*λc2^_ when calculating the absorption coefficient. Note (2): Considering the exact conversion : I(λ)=2*π*clight*I(ω)/(λ*λ). Should be use when comparing the models directly to observed experimental profiles.
Byte-by-byte Description of file (# headlines): tables2.dat
Bytes Format Units Label Explanations
1- 8 F8.3 0.1nm lambda Wavelength (Å) 10- 20 E11.6 --- H2f ?=0 First-order profile for the H2 quasi-molecule (1) 22- 32 E11.6 --- H2s ?=0 Second-order profile for the H2 quasi-molecule (1) 34- 45 E12.6 --- H2+f First-order H2+ quasi-molecule profile evaluated by us via unified theory 47- 57 E11.6 --- H2+s ?=0 Second-order H2+ quasi-molecule profile (2) 59- 69 E11.6 --- H2/H2+ ?=0 A combination between the H2 and H2+ profiles (1)
Note (1): Filled by zeros here because we have not evaluated it. Note (2): Which we did not evaluated because it does not seem to have an observational effect.
History: From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 23-Nov-2017
|The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line|