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PMAS observing run at Calar Alto 3.5m Telescope: Spectroscopic surface brightness fluctuations: pilot study in M31

PMAS observing run at Calar Alto 3.5m Telescope: Spectroscopic surface brightness fluctuations: pilot study in M31
在 Calar Alto 3.5m 望远镜上运行 PMAS 观测：光谱表面亮度波动：M31 的试点研究
批准号：
247977503
负责人：
Professor Dr. Martin Matthias Roth
金额：
$0.0万
依托单位：
Leibniz-Institut für Astrophysik Potsdam (AIP)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2013
资助国家：
德国
项目状态：
已结题
起止时间：
2012-12-31 至 2014-12-31
来源：
https://gepris.dfg.de/gepris/projekt/247977503?language=en
关键词：
PMASobservingrunCalarAlto

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中文摘要
翻译
附近星系中未分辨恒星群的图像中的颗粒度水平可以用直接图像中空间频率的功率谱来量化。表面亮度越平滑，原则上，给定星系的距离就越远。这一原理已被成功地用作河外距离的估算方法，称为SBF方法。我们建议恢复的原则和探索的粒状外观的表面亮度分布的数据立方体从星系在已知的距离作为一种创新的诊断工具，恒星的人口。
英文摘要
The level of graininess in images of unresolved stellar populations in nearby galaxies can be quantified in terms of the power spectrum of spatial frequencies in direct images. The smoother the surface brightness, the more distant is, in principle, a given galaxy. This principle has been exploited successfully as an extragalactic distance estimator, known as the SBF method. We propose to revert the principle and explore the grainy appearance of surface brightness distributions in datacubes from galaxies at known distance as an innovative diagnostic tool for stellar populations.
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会议论文
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