2003A&A...398..411S


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.14CET05:39:55

2003A&A...398..411S - Astronomy and Astrophysics, volume 398, 411-421 (2003/2-1)

Magnetic intensification of spectral lines.

STIFT M.J. and LEONE F.

Abstract (from CDS):

We present an in-depth investigation of the increase in equivalent width of saturated lines under the influence of strong magnetic fields, aptly called ``magnetic intensification''. Assuming 20 different Zeeman patterns (with the number of components ranging from 3 to 45) for a fictitious Feii line at 4500Å in a 10000K, logg = 4.0 Kurucz atmosphere, we calculate equivalent widths as a function of magnetic field strength, field angle and line strength (abundance). The increase over the zero field equivalent width is found to always fall below the n/2 relation suggested by Babcock (1949ApJ...110..126B), where n is the number of Zeeman components. After a discussion of the behaviour of various Zeeman patterns we turn to the influence of anomalous dispersion on magnetic intensification. Changes in line blanketing due to magnetic desaturation appear to be of negligible size. Finally we show that magnetic intensification leads to apparent enhanced abundances and to virtual abundance variations in magnetic stars with dipolar surface magnetic field configurations.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: chemically peculiar - stars: magnetic fields - polarization

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * 53 Cam a2* 08 01 42.4313674994 +60 19 27.801603076   6.177 6.008     A3VpSrSiCrEu 378 0
2 [VV2006] J115952.9-012236 QSO 11 59 52.8370420508 -01 22 35.491813955   20.11       ~ 6 0
3 V* FF Vir a2* 14 25 55.8784653958 +00 59 33.756463958 7.07 7.09 7.07     ApEuSrCr 161 0
4 * bet CrB a2* 15 27 49.7315305 +29 06 20.522375 4.08 3.97 3.68 3.50 3.45 F2VpSrCrEuSi 651 0
5 V* GL Lac a2* 22 44 07.5047921489 +55 35 21.208257555   8.85 8.81     A0p 259 0

    Equat.    Gal    SGal    Ecl

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2019.12.14-05:39:55

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