Galaxy–Galaxy Weak-lensing Measurements from SDSS. I. Image Processing and Lensing Signals
文献类型：期刊论文
| 作者 | Luo,Wentao12,13,14; Yang,Xiaohu14,15; Zhang,Jun14; Tweed,Dylan14; Fu,Liping16; Mo,H. J.1,2; Bosch,Frank C. van den3; Shu,Chenggang16; Li,Ran4 ; Li,Nan5,6,7
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2017-02-07 |
| 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 | Abstract 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 2σ levels. The overall GG lensing signals we measured are in good agreement with Mandelbaum et al. The reduced χ2 between the two measurements in different luminosity bins are from 0.43 to 0.83. Larger reduced χ2 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. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-836-1-38 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/36118]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Department of Astronomy, University of Massachusetts, Amherst, MA 01003-9305, USA 2.Physics Department and Center for Astrophysics, Tsinghua University, Beijing 10084, China 3.Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101, USA 4.Key Laboratory for Computational Astrophysics, Partner Group of the Max Planck Institute for Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China 5.Department of Astronomy & Astrophysics, The University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA 6.Argonne National Laboratory, 9700 South Cass Avenue B109, Lemont, IL 60439, USA 7.Kavli Institute for Cosmological Physics at the University of Chicago, Chicago, IL 60637, USA 8.Department of Astronomy, Peking University, Beijing 100871, China 9.Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA 10.INAF-Osservatorio Astronomico di Napoli, via Moiariello 16, I-80131 Napoli, Italy |
| 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]. The 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.The Astrophysical Journal,836(1). |
| MLA | Luo,Wentao,et al."Galaxy–Galaxy Weak-lensing Measurements from SDSS. I. Image Processing and Lensing Signals".The Astrophysical Journal 836.1(2017). |
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来源：国家天文台
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