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HD 39090


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Evidence of decay of the magnetic fields of AP stars
Data obtained in the Geneva photometric system (Rufener, 1981) andappropriate calibrations of this system in terms of surface magneticfield and gravity are used to provide, on the basis of 708 field andcluster Ap stars, observational evidence that these stars undergo decayof their magnetic field on an evolutionary timescale. Justifications aregiven for the application of a photometric gravity calibration topeculiar stars. The dependence of the photometrically estimated surfacemagnetic field on gravity is found to differ markedly from availabletheoretical 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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观测天体数据

星座:繪架座
右阿森松:05h47m20.40s
赤纬:-51°43'10.7"
视星:9.326
右阿森松适当运动:14.3
赤纬适当运动:6.9
B-T magnitude:9.977
V-T magnitude:9.38

目录:
适当名称   (Edit)
HD 1989HD 39090
TYCHO-2 2000TYC 8099-652-1
USNO-A2.0USNO-A2 0375-02135599
HIPHIP 27328

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