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arXiv 1310.7630astro-ph.SR
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周期光度平面中长周期变星的脉动模

Pulsation Modes of Long-Period Variables in the Period-Luminosity Plane

I. Soszynski, P. R. Wood, A. Udalski

摘要:

本文对大麦云星云中的长周期变星进行了唯象分析,目的是探测与不同周期光度关系相关的脉动模式。在较亮的LPV中,我们发现了一组三模半正则变量,其基本、第一泛音和第二泛音模同时被激发,分别落在PL序列C、C'和B上。在较暗的红巨星中,模式识别更为复杂。我们证明,基本模式的分频器部分重叠的第一泛音模式。我们在PL图中显示了基模和第一泛音周期的可能范围。

英文摘要:

We present a phenomenological analysis of long-period variables (LPVs) in the Large Magellanic Cloud with the aim of detecting pulsation modes associated to different period-luminosity (PL) relations. Among brighter LPVs we discover a group of triple-mode semiregular variables with the fundamental, first overtone and second overtone modes simultaneously excited, which fall on PL sequences C, C' and B, respectively. The mode identification in the fainter red giants is more complicated. We demonstrate that the fundamental-mode pulsators partly overlap with the first-overtone modes. We show a possible range of fundamental mode and first overtone periods in the PL diagram.

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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