Query : 2003A&A...403..179K

2003A&A...403..179K - Astronomy and Astrophysics, volume 403, 179-185 (2003/5-3)

Structure of the magnetic field in the Ap star HD 187474.


Abstract (from CDS):

We reconstruct the complex magnetic field in the Ap star HD 187474 within the frame of the point field source model, where virtual magnetic charges are distributed in the stellar body. The best-fit model describes sufficiently well the observed nonsinusoidal variability of the mean magnetic field modulus and the sinusoidal behaviour of the mean longitudinal magnetic field with the phase of stellar rotation. The best fit provides discrepancy on the level of χ2=6.10 for all the analyzed data. We show that in HD 187474 the magnetic dipole is displaced from centre of the star by 0.055R*. The dipole has a size ∼0.035 R*. The angle between the stellar rotational axis and the magnetic dipole is β=37°.

Abstract Copyright:

Journal keyword(s): stars: chemically peculiar - stars: magnetic fields - stars: rotation - stars: individual: HD 187474

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 V* CU Vir a2* 14 12 15.8054758 +02 24 33.953395 4.46 4.90 5.02 5.10 5.23 ApSi 380 0
2 V* V3961 Sgr a2* 19 51 50.6106718344 -39 52 27.738309468 5.05 5.27 5.33     ApCr(Si) 181 0

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