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arXiv 0912.4870astro-ph.SR
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盖亚任务和变星

The Gaia mission and variable stars

Laurent Eyer, Nami Mowlavi, Mihaly Varadi, Maxime Spano, Isabelle Lecoeur-Taibi, Gisella Clementini

摘要:

将于2012年发射的盖亚卫星将对整个天空进行前所未有的调查,最低可达20级。该飞行任务的多时期性质提供了一个独特的机会,通过其天体测量、光度测量、分光光度测量和径向速度测量来研究可变源。预计将探测到数以千万计的经典变星,大多数是恒星,但也有类星体和小行星。盖亚观测到的大量天体将使人们能够对各种来源的天体及其特性进行统计研究。但盖亚也将允许根据其变化类型对单个物体进行一定深度的研究,并确定可能感兴趣的候选者,这些候选者将受益于科学界进一步的地面观测。在盖亚数据处理和分析联盟(DPAC)内,该联盟分为9个协调单位(CU),其中一个(CU 7)专门负责变异性分析。其目标是为盖亚中期和最终目录发布提供关于可变源的信息。

英文摘要:

The Gaia satellite, to be launched in 2012, will offer an unprecedented survey of the whole sky down to magnitude 20. The multi-epoch nature of the mission provides a unique opportunity to study variable sources with their astrometric, photometric, spectro-photometric and radial velocity measurements. Many tens of millions of classical variable objects are expected to be detected, mostly stars but also QSOs and asteroids. The high number of objects observed by Gaia will enable statistical studies of populations of variable sources and of their properties. But Gaia will also allow the study of individual objects to some depth depending on their variability types, and the identification of potentially interesting candidates that would benefit from further ground based observations by the scientific community. Within the Gaia Data Processing and Analysis Consortium (DPAC), which is subdivided into 9 Coordination Units (CU), one (CU7) is dedicated to the variability analysis. Its goal is to provide information on variable sources for the Gaia intermediate and final catalogue releases.

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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