AXISYMMETRICAL SPHERICAL HARMONIC DECOMPOSITION OF THE PULSATION MODES IN RAPIDLY OSCILLATING AP STARS

被引：35

作者：

KURTZ, DW

机构：

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1992年 / 259卷 / 04期

关键词：

STARS-INDIVIDUAL-HR-3831; STARS-OSCILLATIONS;

D O I：

10.1093/mnras/259.4.701

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Several of the rapidly oscillating Ap stars have frequency spectra which show frequency triplets split exactly equally by the rotation frequency of the star. Recently, one of these stars, HR3831, has been found to have an equally split frequency septuplet. None of those frequency multiplets can be described adequately by a single spherical harmonic pulsation mode. In this paper a method is presented for modelling the observed frequency spectrum of a rapidly oscillating Ap star as a sum of axisymmetric spherical harmonics of low degree within the assumptions of the oblique pulsator model. It is shown that such a sum with l less-than-or-equal-to 3 is sufficient to describe the observations.

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页码：701 / 708

页数：8

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