Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313..750g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 313, Feb. 15, 1987, p. 750-756. Research sponsored by the Polska Akademia N
Astronomy and Astrophysics
Astrophysics
19
Balmer Series, H Lines, Pressure Effects, Stellar Mass, White Dwarf Stars, H Alpha Line, H Beta Line, Opacity, Red Shift, Relativity
Scientific paper
Emergent profiles of the Balmer lines in white dwarf star spectra have been calculated taking into account the effect of the pressure shift (PS) in plasma. The line profiles given by the calculations are redshifted and are asymmetrical in both flux and residual flux scales. The pressure redshift inferred from the profiles increases with distance from the line center. In a broad central region where 'observational line center' is defined, the pressure redshift becomes a substantial fraction of the gravitational one, especially at moderate surface gravities, log g = 7-8, and the effective temperatures less than 15,000 K of the white dwarf stars. The results probably completely explain the longstanding discrepancy between 'relativistic" and 'astrophysical' masses of white dwarfs.
Grabowski B.
Halenka J.
Madej Jerzy
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