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arXiv 1012.5222astro-ph.SR
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H1504 +65的HST/COS光谱

HST/COS Spectroscopy of H1504+65

Klaus Werner, Thomas Rauch

摘要:

本文报道了用COS在HST上观测到的奇特白矮星(WD)H 1504 +65的紫外光谱。H1504+65是已知最热的WD(Teff= 200,000 K),其大气主要由C和O组成,并增加了大量的Ne和Mg。这个物体是独一无二的,其表面化学的起源完全不清楚。我们可能看到的是C-O WD或O-Ne-Mg WD的裸核。在后一种情况下,这将是第一个直接证明这种WD可能是单星演化的结果。新的观测是为了揭示这个神秘物体的起源。

英文摘要:

We present new ultraviolet spectra of the peculiar white dwarf (WD) H1504+65, obtained with COS on HST. H1504+65 is the hottest known WD (Teff= 200,000 K) and has an atmosphere mainly composed of C and O, augmented with high amounts of Ne and Mg. This object is unique and the origin of its surface chemistry is completely unclear. We probably see the naked core of either a C--O WD or even a O--Ne--Mg WD. In the latter case, this would be the first direct proof that such WDs can be the outcome of single-star evolution. The new observations were performed to shed light on the origin of this mysterious object.

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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