The Free-Free Absorption Coefficients of the Negative Helium Ion

Details The Free-Free Absorption Coefficients of the Negative Helium Ion The Free-Free Absorption Coefficients of the Negative Helium Ion

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.269..871j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 269, NO. 4/AUG15, P. 871, 1994

Astronomy and Astrophysics

Astronomy

16

Scientific paper

Free-free absorption coefficients of the negative helium ion are calculated by a phaseshift approximation, using continuum data that accurately account for electron-atom correlation and polarization. The approximation is considered to yield results within a few per cent of numerical values for wavelengths greater than 1 m, over the temperature range 1400-10080 K. These coefficients are expected to give the best current estimates of He - continuous absorption. Key words: atomic data - atomic processes - stars: atmospheres - infrared: general.

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