Evidence of decay of the magnetic fields of AP stars

Details Evidence of decay of the magnetic fields of AP stars Evidence of decay of the magnetic fields of AP stars

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26as...58..387n&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 58, Nov. 1984, p. 387-403. Research supported by the Swiss N

Astronomy and Astrophysics

Astrophysics

26

A Stars, Astronomical Photometry, B Stars, Peculiar Stars, Stellar Gravitation, Stellar Magnetic Fields, Decay, Magnetic Stars, Manganese, Mercury (Metal), Tables (Data)

Scientific paper

Data obtained in the Geneva photometric system (Rufener, 1981) and appropriate calibrations of this system in terms of surface magnetic field and gravity are used to provide, on the basis of 708 field and cluster Ap stars, observational evidence that these stars undergo decay of their magnetic field on an evolutionary timescale. Justifications are given for the application of a photometric gravity calibration to peculiar stars. The dependence of the photometrically estimated surface magnetic field on gravity is found to differ markedly from available theoretical calculations. HgMn stars are found to show the same trend, strengthening the impression that they might be slightly magnetic. He-weak stars do not.

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