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arXiv 1406.4867astro-ph.GAastro-ph.CO
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6dF星系巡天:基本面数据

The 6dF Galaxy Survey: Fundamental Plane Data

Lachlan A. Campbell, John R. Lucey, Matthew Colless, D. Heath Jones, Christopher M. Springob, Christina Magoulas, Robert N. Proctor, Jeremy R. Mould, Mike A. Re… 展开作者

Lachlan A. Campbell, John R. Lucey, Matthew Colless, D. Heath Jones, Christopher M. Springob, Christina Magoulas, Robert N. Proctor, Jeremy R. Mould, Mike A. Read, Sarah Brough, Tom Jarrett, Alex I. Merson, Philip Lah, Florian Beutler, Michelle E. Cluver, Quentin A. Parker

摘要:

本文报道了6dFGS基本面(6dFGSv)星表,它被用来估算近9,000个在本星系(z $<$ 0.055)宇宙中的早型星系的距离和奇特速度。对11,315个星系的样本,用典型信噪比为12.9 $^{-1}$的6dF V波段光谱互相关法得到了速度色散,中值速度色散为163 km $^{-1}$,中值测量误差为12.9%.测光基本面(FP)参数(有效半径和表面亮度)是由11,102个星系的$JHK$ 2 MASS图像确定的。独立的$J$ -和$K$ -波段测量值的比较表明,每个波段的$X_{FP}$(进入FP的组合光度参数)的平均不确定度为0.013 dex(3%)。形态的视觉分类被用来选择形成6dFGSv的近9,000个早期类型星系的样本。该星表已被用于研究恒星星族对星系标度关系的影响,考察FP随环境和星系形态的变化,探索穿过、沿FP和穿过FP的恒星星族的趋势,以及绘制和分析局部特有的速度场。

英文摘要:

We report the 6dFGS Fundamental Plane (6dFGSv) catalogue that is used to estimate distances and peculiar velocities for nearly 9,000 early-type galaxies in the local (z$<$0.055) universe. Velocity dispersions are derived by cross-correlation from 6dF V-band spectra with typical S/N of 12.9 Å$^{-1}$ for a sample of 11,315 galaxies; the median velocity dispersion is 163 kms$^{-1}$ and the median measurement error is 12.9%. The photometric Fundamental Plane (FP) parameters (effective radii and surface brightnesses) are determined from the $JHK$ 2MASS images for 11,102 galaxies. Comparison of the independent $J$- and $K$-band measurements implies that the average uncertainty in $X_{FP}$, the combined photometric parameter that enters the FP, is 0.013 dex (3%) for each band. Visual classification of morphologies was used to select a sample of nearly 9,000 early-type galaxies that form 6dFGSv. This catalogue has been used to study the effects of stellar populations on galaxy scaling relations, to investigate the variation of the FP with environment and galaxy morphology, to explore trends in stellar populations through, along and across the FP, and to map and analyse the local peculiar velocity field.

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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