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arXiv 1306.0285astro-ph.CO
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使用SDSS DR8数据校准基本平面

Calibrating the fundamental plane with SDSS DR8 data

Christoph Saulder, Steffen Mieske, Werner W. Zeilinger, Igor V. Chilingarian

摘要:

我们提出了一个校准的基本面使用SDSS数据版本8。我们分析了约93000椭圆星系高达$z<0.2$,最大的样本用于校准的基本平面到目前为止。我们结合了最新的K修正,并使用GalaxyZoo数据对样本中的星系进行分类。我们推导出所有五个Sloan滤波器u、g、r、i和z的独立基本平面拟合。使用体积加权最小二乘法的直接拟合被应用于获得基本平面的系数,其隐含地校正Malmquist偏差。我们实现了15%的精度为基本平面作为距离指标。我们提供了一个详细的讨论,校准和他们的影响,得到的适合。这些重新校准的基本平面关系形成了一个非常适合的锚大规模的特殊速度研究在附近的宇宙。除基本面外,我们还讨论了椭圆星系的红移分布和整体参数。

英文摘要:

We present a calibration of the fundamental plane using SDSS Data Release 8. We analysed about 93000 elliptical galaxies up to $z<0.2$, the largest sample used for the calibration of the fundamental plane so far. We incorporated up-to-date K-corrections and used GalaxyZoo data to classify the galaxies in our sample. We derived independent fundamental plane fits in all five Sloan filters u, g, r, i and z. A direct fit using a volume-weighted least-squares method was applied to obtain the coefficients of the fundamental plane, which implicitly corrects for the Malmquist bias. We achieved an accuracy of 15% for the fundamental plane as a distance indicator. We provide a detailed discussion on the calibrations and their influence on the resulting fits. These re-calibrated fundamental plane relations form a well-suited anchor for large-scale peculiar-velocity studies in the nearby universe. In addition to the fundamental plane, we discuss the redshift distribution of the elliptical galaxies and their global parameters.

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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