H i-SELECTED GALAXIES IN THE SLOAN DIGITAL SKY SURVEY. I. OPTICAL DATA
H i-SELECTED GALAXIES IN THE SLOAN DIGITAL SKY SURVEY. I. OPTICAL DATA
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DOI：
10.1088/0004-6256/139/2/315
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发表时间：
2009-10
期刊：
影响因子：
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通讯作者：
A. West;D. Garcia-Appadoo;Julianne J. Dalcanton;M. Disney;C. Rockosi;Ž. Ivezić;M. Bentz;J. Brinkman
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文献类型：
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作者：
A. West;D. Garcia-Appadoo;Julianne J. Dalcanton;M. Disney;C. Rockosi;Ž. Ivezić;M. Bentz;J. Brinkman
我们给出了属于斯隆数字巡天(SDSS)和帕克斯赤道巡天(ES)的195个H i精选星系的光学数据。对于我们的样本，已使用针对大型星系优化的新测光管道独立地重新计算了光度学量，从而修正了SDSS在角度较大或表面亮度(LSB)较低的星系自动测光方面的有限可靠性。概述了SDSS目录级测光不确定度的大小，推导了SDSS测光管道中天空差值的定量校正方法。本文的主旨是介绍ES/SDSS样品，并讨论改进后的光度法背后的方法，以用于未来的科学分析。我们给出了样品的总体光学性质，并与体积受限的光学选择样品进行了简要比较。与光学选择的SDSS样本(体积相似)相比，HI选择的星系更蓝、更明亮(较少的矮星椭圆体和更多的恒星形成)。然而，与典型的SDSS星系研究相比，SDSS星系研究具有自己的选择效应，我们的样本更蓝、更暗、质量更小。
We present the optical data for 195 H i-selected galaxies that fall within both the Sloan Digital Sky Survey (SDSS) and the Parkes Equatorial Survey (ES). The photometric quantities have been independently recomputed for our sample using a new photometric pipeline optimized for large galaxies, thus correcting for SDSS's limited reliability for automatic photometry of angularly large or low surface brightness (LSB) galaxies. We outline the magnitude of the uncertainty in the SDSS catalog-level photometry and derive a quantitative method for correcting the over-sky subtraction in the SDSS photometric pipeline. The main thrust of this paper is to present the ES/SDSS sample and discuss the methods behind the improved photometry, which will be used in future scientific analysis. We present the overall optical properties of the sample and briefly compare to a volume-limited, optically selected sample. Compared to the optically selected SDSS sample (in the similar volume), H i-selected galaxies are bluer and more luminous (fewer dwarf ellipticals and more star formation). However, compared to typical SDSS galaxy studies, which have their own selection effect, our sample is bluer, fainter, and less massive.