Access to Astronomical Catalogues

← Click to display the menu
J/A+A/610/A57       Inelastic O+H collision data                 (Barklem, 2018)

Excitation and charge transfer in low-energy hydrogen atom collisions with neutral oxygen. Barklem P.S. <Astron. Astrophys. 610, A57 (2018)> =2018A&A...610A..57B (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics Keywords: atomic data - line: profiles Abstract: Excitation and charge transfer in low-energy O+H collisions is studied; it is a problem of importance for modelling stellar spectra and obtaining accurate oxygen abundances in late-type stars including the Sun. The collisions have been studied theoretically using a previously presented method based on an asymptotic two-electron linear combination of atomic orbitals (LCAO) model of ionic-covalent interactions in the neutral atom-hydrogen-atom system, together with the multichannel Landau-Zener model. The method has been extended to include configurations involving excited states of hydrogen using an estimate for the two-electron transition coupling, but this extension was found to not lead to any remarkably high rates. Rate coefficients are calculated for temperatures in the range 1000-20000K, and charge transfer and (de)excitation processes involving the first excited S-states, 4s.5So and 4s.3So, are found to have the highest rates. Description: The file states.dat lists the considered states. The remaining files then provide the rate coefficients and "fluctuations". File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file states.dat 27 21 States and their energies list.dat 97 60 List of files in subdirectory files files/* 273 60 Individual rate coefficients files
See also: J/A+A/572/A103 : Inelastic silicon-hydrogen collision data (Belyaev+, 2014) J/A+A/606/A11 : Inelastic e+Mg collision data (Barklem+, 2017) Byte-by-byte Description of file: states.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Index [1/21] Index 4- 15 A12 --- Label Term label 16- 27 F12.3 cm-1 E Term energy in 1/cm
Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
1- 13 A13 --- FileName Name of the file in subdirectory files 15- 97 A83 --- Title Title of the file
Byte-by-byte Description of file: files/*
Bytes Format Units Label Explanations
2- 13 E12.4 cm+3/s Ratec1 Rate coefficient for index = 1 (1) 15- 26 E12.4 cm+3/s Ratec2 Rate coefficient for index = 2 (1) 28- 39 E12.4 cm+3/s Ratec3 Rate coefficient for index = 3 (1) 41- 52 E12.4 cm+3/s Ratec4 Rate coefficient for index = 4 (1) 54- 65 E12.4 cm+3/s Ratec5 Rate coefficient for index = 5 (1) 67- 78 E12.4 cm+3/s Ratec6 Rate coefficient for index = 6 (1) 80- 91 E12.4 cm+3/s Ratec7 Rate coefficient for index = 7 (1) 93-104 E12.4 cm+3/s Ratec8 Rate coefficient for index = 8 (1) 106-117 E12.4 cm+3/s Ratec9 Rate coefficient for index = 9 (1) 119-130 E12.4 cm+3/s Ratec10 Rate coefficient for index = 10 (1) 132-143 E12.4 cm+3/s Ratec11 Rate coefficient for index = 11 (1) 145-156 E12.4 cm+3/s Ratec12 Rate coefficient for index = 12 (1) 158-169 E12.4 cm+3/s Ratec13 Rate coefficient for index = 13 (1) 171-182 E12.4 cm+3/s Ratec14 Rate coefficient for index = 14 (1) 184-195 E12.4 cm+3/s Ratec15 Rate coefficient for index = 15 (1) 197-208 E12.4 cm+3/s Ratec16 Rate coefficient for index = 16 (1) 210-221 E12.4 cm+3/s Ratec17 Rate coefficient for index = 17 (1) 223-234 E12.4 cm+3/s Ratec18 Rate coefficient for index = 18 (1) 236-247 E12.4 cm+3/s Ratec19 Rate coefficient for index = 19 (1) 249-260 E12.4 cm+3/s Ratec20 Rate coefficient for index = 20 (1) 262-273 E12.4 cm+3/s Ratec21 Rate coefficient for index = 21 (1)
Note (1): The files are in the form (row,column) = (final state, initial state), as defined by the labels in states.dat.
Acknowledgements: Paul Barklem, paul.barklem(at)
(End) Paul Barklem [Uppsala Univ., Sweden], Patricia Vannier [CDS] 05-Dec-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

catalogue service