arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0812.4859astro-ph
收藏

对混合亚矮星B型双星HS0702 +6043的长期光度监测

Long-term photometric monitoring of the hybrid subdwarf B pulsator HS0702+6043

R. Lutz, S. Schuh, R. Silvotti, R. Kruspe, S. Dreizler

摘要:

脉动亚矮星B以短周期$p$模式或长周期$g$模式振荡。HS 0702 + 6043是目前已知的显示两种类型特征的三个对象之一,因此被归类为混合型制冷剂。我们简要介绍了我们的分析$g$模式域的这颗星,但重点放在第一个结果,特别是长期光度监测的$p$模式振荡。我们提出了一个高分辨率的频谱,并报告我们努力构建一个多赛季的O-C图。除了标准的(虽然不平凡的)练习在asteroseismology探测恒星的瞬时内部结构,测量的脉动频率的变化,从一个{O--C}图可以比较到理论上的进化时标。在{EXOTIME}计划中,我们也使用相同的数据来搜索极端水平分支物体周围的行星同伴。

英文摘要:

Pulsating subdwarf B stars oscillate in short-period $p$-modes or long-period $g$-modes. HS 0702 + 6043 is one of currently three objects known to show characteristics of both types and hence is classified as hybrid pulsator. We briefly present our analysis of the $g$-mode domain of this star, but focus on first results from long-term photometric monitoring in particular of the $p$-mode oscillations. We present a high-resolution frequency spectrum, and report on our efforts to construct a multi-season O--C diagram. Additionally to the standard (although nontrivial) exercise in asteroseismology to probe the instantaneous inner structure of a star, measured changes in the pulsation frequencies as derived from an {O--C} diagram can be compared to theoretical evolutionary timescales. Within the {EXOTIME} program, we also use this same data to search for planetary companions around extreme horizontal branch objects.

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。

↑