Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...292..260a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 292, May 1, 1985, p. 260-266.
Astronomy and Astrophysics
Astrophysics
55
Hydrogen, Magnetic Stars, Stellar Magnetic Fields, Stellar Spectra, Visible Spectrum, White Dwarf Stars, Field Strength, Line Spectra, Polarimetry, Ultraviolet Spectra, Zeeman Effect
Scientific paper
Spectra from the magnetic white dwarf Grw +70 deg 8247 are compared with Roesner et al's. (1984) hydrogen spectrum up to 10 to the 9th G. It is noted that nearly all definite absorption features coincide with transitions whose energy is stationary or nearly stationary, with field strength in the 1.6 to 3.5 X 10 to the 8th G range. The complex spectrum of circular polarization is generally consistent with dipolar field geometry. The surface field presently derived is not consistent with the interpretataion of the weak 1345 A feature in the IUE spectrum as being due to Lyman-alpha, which is presently suggested to be much stronger, causing a broad depression in the continuum below 1400 A.
Angel James Roger P.
Liebert James
Stockman Hervey S.
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