Hydrogen atomic model effects in the NLTE modelling of dMe chromospheres

Details Hydrogen atomic model effects in the NLTE modelling of dMe chromospheres Hydrogen atomic model effects in the NLTE modelling of dMe chromospheres

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...231..459h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 231, no. 2, May 1990, p. 459-465.

Astronomy and Astrophysics

Astrophysics

23

Chromosphere, Dwarf Stars, Hydrogen Atoms, Nonequilibrium Thermodynamics, Stellar Models, Line Spectra, M Stars, Radiative Transfer, Stellar Spectra

Scientific paper

Modeling of the hydrogen lines in dMe chromospheres is shown to be very dependent on the completeness of the atomic model used. To illustrate this, the results while varying the number of atomic bound levels or assuming the detailed balance in the Lyman lines are discussed. Results of computations with updated collisional data are also discussed. By examining the main rates that affect the atomic equilibrium, the differences between models, for these cool stars with high density chromospheres and faint photospheric radiation field are interpreted and discussed.

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