The NOG sample: Galaxy systems and 3D real-space galaxy density

被引：0
|
作者：
Marinoni, C [1 ]
Giuricin, G [1 ]
Ceriani, L [1 ]
Pisani, A [1 ]
机构：
[1] Univ Trieste, Dept Astron, Trieste, Italy
来源：
COSMIC FLOWS 1999: TOWARDS AN UNDERSTANDING OF LARGE-SCALE STRUCTURE | 2000年 / 201卷
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We discuss the 3D real-space reconstruction of the optical galaxy density held in the local universe as derived from the galaxies of the Nearby Optical Galaxy (NOG) sample. NOG is a distance-limited (cz(LG) less than or equal to 6000 km s(-1)) and magnitude-limited (B less than or equal to 14 mag) sample of 7076 optical galaxies which covers 2/3 (8.29 sr) of the sky (\b\ > 20 degrees). We have replaced "true distance" measurements for all the objects in order to correct for redshift distortions (Marinoni et al. 1998). Using homogenized photometric information for the whole sample, NOG is meant to be an approximation to a homogeneous all-sky 3D optically selected and statistically well-controlled galaxy sample that probes in great detail volumes of cosmological interest. Our goal is to construct a reliable, robust and unbiased field of density contrasts covering interesting regions of galaxy and mass overdensities of the local universe.
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页码：314 / 317
页数：4
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