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Photometrically determined mean surface magnetic fields of Ap stars
Author(s) -
Oetken L.
Publication year - 1985
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113060403
Subject(s) - stars , physics , zeeman effect , astrophysics , magnetic field , surface (topology) , line (geometry) , mathematics , geometry , quantum mechanics
The photometrically determined mean surface magnetic fields B S need a revision. None of the stars for which B S can be measured directly by Zeeman line splitting fulfils the relation between the photometric parameter Δ( V 1 – G ) and the mean surface field B S , which is used by N ORTH , C RAMER and M AEDER to determine B S for other B2 – A3 stars. The ratio B eff Max / B S for stars, which define North's relation, shows unreasonable large values.
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