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arXiv 0902.4354astro-ph.SR
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更多关于麦哲伦星云中的脉动B型恒星

More on pulsating B-type stars in the Magellanic Clouds

P. D. Diago, J. Gutiérrez-Soto, J. Fabregat, C. Martayan

摘要:

在这里,我们提出了我们的研究结果,B型闪烁在低金属丰度的环境中,寻找短期的周期性变化的大样本的B和Be星的麦哲伦云(MC),其中的基本天体物理参数被准确地确定。大量的仙王座β和类SPB的脉动在低金属丰度下被探测到,这与目前的脉动理论模型相冲突。此外,我们已经把这些脉动的恒星在HR图映射的MC金属丰度观测不稳定区域。大样本的B和Be星分析允许5Aus作出一个可靠的统计的脉动B型星在MC。最后,我们对脉动理论和低金属丰度环境下的观测进行了比较。

英文摘要:

We present here the results of our research for B-type pulsators in low metallicity environments, searching for short-term periodic variability in a large sample of B and Be stars in the Magellanic Clouds (MC), for which the fundamental astrophysical parameters were accurately determined. A significant number of beta Cephei and SPB-like pulsators at low-metallicity have been detected, conflicting with the current theoretical models of pulsation. In addition, we have placed these pulsating stars in the HR diagram mapping the observational instability regions for the MC metallicities. The large sample of B and Be stars analysed allows 5Aus to make a reliable statistics of the pulsating B-type stars in the MC. Finally, we have made a comparison between pulsational theory and observations in low metallicity environments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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