期刊文献+

太阳存在脉动不稳定的低球谐阶p1模吗?

Are There the Unstable Low-degree P1 modes in the Sun?
下载PDF
导出
摘要 利用一种非局部和非定常的恒星对流理论,计算了太阳中低球谐阶(l<25)模的非绝热脉动.结果表明,低阶(0<l<6)非径向p1模是脉动不稳定的,而与之相邻的g模、f模和p2-p5模都是脉动稳定的.根据累积功图的分析,发现振荡的激发来自对流区底部区域.太阳是否存在不稳定的低球谐阶p1模对判断太阳5 min振荡的激发机制有重要意义. By using a nonlocal time-dependent theory of convection, the nonadiabatic oscillations of the solar lowand intermediate-degree (l 〈 25) modes are calculated. The results show that the nonradial pl modes of l = 1 - 5 are pulsationally unstable. However, the adjacent g, f, p2-p5 modes, and pl modes of l 〉 5 are stable. The analysis of accu- mulated works shows that the excitation of the low-degree pl modes is resulted from the radiation zone beneath the convection zone. Whether the sun has the unstable low-degree pl modes is significant for defining the excitation mechanism of the solar five-minute oscillation.
出处 《天文学报》 CSCD 北大核心 2012年第6期500-506,共7页 Acta Astronomica Sinica
基金 国家自然科学基金项目(11073053 10973015)资助
关键词 太阳 振荡 对流 sun: oscillation, convection
  • 相关文献

参考文献27

  • 1Balmforth N J. MNRAS, 1992, 255:603.
  • 2Goldreich P, Keeley D A. ApJ, 1977, 211:934.
  • 3Goldreich P, Keeley D A. ApJ, 1977, 212:243.
  • 4Kumar P Franklin J, Goldreich P, ApJ, 1988, 328:879.
  • 5Kumar P, Golreich P. ApJ 1989, 342:558.
  • 6Goldreich P, Kumar P. ApJ, 1988, 326:462.
  • 7Goldreich P, Murray N, Kumar P. ApJ, 1994, 424:466.
  • 8Samadi R, Nordlund A, Stein R F, et al. A&:A, 2003, 403:303.
  • 9Xiong D R, Cheng Q L, Deng L. ApJ, 1998, 500:449.
  • 10Xiong D R, Deng L. MNRAS, 2001, 324:243.

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部