Magnetic field and iron abundance in the atmospheres of Omicron Peg and Phi HER

Details Magnetic field and iron abundance in the atmospheres of Omicron Peg and Phi HER Magnetic field and iron abundance in the atmospheres of Omicron Peg and Phi HER

Aug 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995azh....72..543l&link_type=abstract

Astronomicheskij Zhurnal, vol. 72, p. 543

Astronomy and Astrophysics

Astronomy

6

Peculiar Stars, Stellar Atmospheres, Stellar Magnetic Fields, Metallicity, Magnetohydrodynamic Turbulence, Line Spectra, Iron, Stellar Spectra

Scientific paper

The magnetic field, microturbulence, and iron abundance in the atmospheres of Omicron Peg and Phi Her have been estimated using model atmospheres and minimization of the scatter in iron abundances derived from various lines. The mean chaotic surface magnetic field H in Omicron Peg is approximately 2000 G, and the microturbulence is close to 1.75 km/s. The atmospheric iron abundance closely matches the solar value. The corresponding parameters for Phi Herare are H equal to or less than 50 G, vt = 0.1 km/s, and logN(Fe) = 7.654 +/- 0.026. There are no differences in the abundances inferred from Fe I and Fe II lines.

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