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arXiv 1407.6004astro-ph.SRastro-ph.EP
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恒星颜色/表面亮度关系标定的新方法

A New Method to Calibrate the Stellar Color/Surface-Brightness Relation

Andrew Gould

摘要:

我表明,标准的微透镜技术来测量的角半径的恒星使用颜色/表面亮度的关系可以被逆转,通过后期自行测量,校准这些关系。这种方法对于金属含量非常丰富的恒星特别有用,因为这些恒星在其他方法最有效的太阳附近供应不足,但在银河系隆起微透镜领域非常丰富。我提供了一份清单,列出了八颗光谱上确定的具有必要的有限源效应的高金属丰度核球恒星,其中七颗将在巨型麦哲伦望远镜上线时成为合适的校准者。更多这样的来源可以从当前和未来的微透镜调查中提取。

英文摘要:

I show that the standard microlensing technique to measure the angular radius of a star using color/surface-brightness relations can be inverted, via late-time proper motion measurements, to calibrate these relations. The method is especially useful for very metal-rich stars because such stars are in short supply in the solar neighborhood where other methods are most effective, but very abundant in Galactic bulge microlensing fields. I provide a list of eight spectroscopically identified high-metallicity bulge stars with the requisite finite-source effects, seven of which will be suitable calibrators when the Giant Magellan Telescope comes on line. Many more such sources can be extracted from current and future microlensing surveys.

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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