Galaxy-Galaxy Weak-lensing Measurements from SDSS. I. Image Processing and Lensing Signals
文献类型：期刊论文
| 作者 | Luo, Wentao14,15,16; Yang, Xiaohu13,14; Zhang, Jun14; Tweed, Dylan14; Fu, Liping12; Mo, H. J.1,10,11; van den Bosch, Frank C.17; Shu, Chenggang12; Li, Ran2; Li, Nan3,4,5 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2017-02-10 |
| 卷号 | 836期号:1 |
| 关键词 | Galaxies: Clusters: General Gravitational Lensing: Weak Techniques: Image Processing |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/836/1/38 |
| 英文摘要 | We present our image processing pipeline that corrects the systematics introduced by the point-spread function (PSF). Using this pipeline, we processed Sloan Digital Sky Survey (SDSS) DR7 imaging data in r band and generated a galaxy catalog containing the shape information. Based on our shape measurements of the galaxy images from SDSS DR7, we extract the galaxy-galaxy (GG) lensing signals around foreground spectroscopic galaxies binned in different luminosities and stellar masses. We estimated the systematics, e. g., selection bias, PSF reconstruction bias, PSF dilution bias, shear responsivity bias, and noise rectification bias, which in total is between -9.1% and 20.8% at 2 sigma levels. The overall GG lensing signals we measured are in good agreement with Mandelbaum et al. The reduced chi(2) between the two measurements in different luminosity bins are from 0.43 to 0.83. Larger reduced chi(2) from 0.60 to 1.87 are seen for different stellar mass bins, which is mainly caused by the different stellar mass estimator. The results in this paper with higher signal-to-noise ratio are due to the larger survey area than SDSS DR4, confirming that more luminous/massive galaxies bear stronger GG lensing signals. We divide the foreground galaxies into red/blue and star-forming/quenched subsamples and measure their GG lensing signals. We find that, at a specific stellar mass/luminosity, the red/quenched galaxies have stronger GG lensing signals than their counterparts, especially at large radii. These GG lensing signals can be used to probe the galaxy-halo mass relations and their environmental dependences in the halo occupation or conditional luminosity function framework. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000395740700011 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://119.78.226.72/handle/331011/32641]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Luo, Wentao |
| 作者单位 | 1.Tsinghua Univ, Ctr Astrophys, Beijing 10084, Peoples R China 2.Chinese Acad Sci, Key Lab Computat Astrophys, Partner Grp, Max Planck Inst Astrophys,Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Chicago, Dept Astron & Astrophys, 5640 South Ellis Ave, Chicago, IL 60637 USA 4.Argonne Natl Lab, 9700 South Cass Ave B109, Lemont, IL 60439 USA 5.Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA 6.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 7.Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA 8.INAF, Osservatorio Astronom Napoli, Via Moiariello 16, I-80131 Naples, Italy 9.INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy 10.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA |
| 推荐引用方式 GB/T 7714 | Luo, Wentao,Yang, Xiaohu,Zhang, Jun,et al. Galaxy-Galaxy Weak-lensing Measurements from SDSS. I. Image Processing and Lensing Signals[J]. ASTROPHYSICAL JOURNAL,2017,836(1). |
| APA | Luo, Wentao.,Yang, Xiaohu.,Zhang, Jun.,Tweed, Dylan.,Fu, Liping.,...&Radovich, Mario.(2017).Galaxy-Galaxy Weak-lensing Measurements from SDSS. I. Image Processing and Lensing Signals.ASTROPHYSICAL JOURNAL,836(1). |
| MLA | Luo, Wentao,et al."Galaxy-Galaxy Weak-lensing Measurements from SDSS. I. Image Processing and Lensing Signals".ASTROPHYSICAL JOURNAL 836.1(2017). |
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来源：上海天文台
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