首页> 外文期刊>The Astrophysical journal >DISCOVERY OF CARBON/OXYGEN-DEPLETED BLUE STRAGGLER STARS IN 47 TUCANAE: THE CHEMICAL SIGNATURE OF A MASS TRANSFER FORMATION PROCESS
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DISCOVERY OF CARBON/OXYGEN-DEPLETED BLUE STRAGGLER STARS IN 47 TUCANAE: THE CHEMICAL SIGNATURE OF A MASS TRANSFER FORMATION PROCESS

机译:TUCANAE中47个碳/耗氧的蓝色散流星的发现:传质形成过程的化学特征

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摘要

We use high-resolution spectra obtained with the ESO Very Large Telescope to measure surface abundance patterns of 43 blue straggler stars (BSSs) in 47 Tuc. We discovered that a subpopulation of BSSs shows a significant depletion of carbon and oxygen with respect to the dominant population. This evidence would suggest the presence of CNO burning products on the BSS surface coming from a deeply peeled parent star, as expected in the case of a mass transfer process. This is the first detection of a chemical signature clearly pointing to a specific BSS formation process in a globular cluster.
机译:我们使用ESO超大型望远镜获得的高分辨率光谱来测量47 Tuc中的43个蓝色散乱星(BSSs)的表面丰度模式。我们发现,相对于优势种群,BSSs的亚群显示出碳和氧的大量消耗。该证据表明,在传质过程中,BSS表面存在CNO燃烧产物,该产物来自深层剥离的母星。这是对化学特征的首次检测,清楚地指出了球状簇中特定的BSS形成过程。

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