Hydrogen in the strong magnetic field of the white dwarf PG 1031 + 234

Details Hydrogen in the strong magnetic field of the white dwarf PG 1031 + 234 Hydrogen in the strong magnetic field of the white dwarf PG 1031 + 234

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257..353o&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 1, p. 353-358.

Astronomy and Astrophysics

Astrophysics

9

Hydrogen, Magnetic Stars, Stellar Magnetic Fields, White Dwarf Stars, Astronomical Polarimetry, Linear Polarization, Stellar Models, Stellar Spectrophotometry, Zeeman Effect

Scientific paper

According to the classical Zeeman effect, the pi components of Zeeman split lines are linearly polarized but not circularly polarized at all. However, in the magnetic white dwarf PG 1031 + 234, the absorption features formed by stationary n-transitions of Zeeman split hydrogen lines are, with respect to the ambient continuum, strongly circularly polarized. This is explained in terms of an opacity effect in a magnetic field geometry which differs clearly from a centered dipole and in connection with a continuum polarization where the ratio of the linear to circular polarization depends not only on the angle between the line of sight and the field vector, but on the field strength, too.

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