Galaxy–Galaxy Weak-lensing Measurements from SDSS. I. Image Processing and Lensing Signals
Luo,Wentao1,2,3; Yang,Xiaohu3,4; Zhang,Jun3; Tweed,Dylan3; Fu,Liping5; Mo,H. J.6,7; Bosch,Frank C. van den8; Shu,Chenggang5; Li,Ran9; Li,Nan10,11,12; Liu,Xiangkun13; Pan,Chuzhong13; Wang,Yiran14; Radovich,Mario15,16
Source PublicationThe Astrophysical Journal
AbstractAbstract 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.
Keywordgalaxies: clusters: general gravitational lensing: weak techniques: image processing
WOS IDIOP:0004-637X-836-1-38
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Nandan Road 80, Shanghai 200030, China;
2.Center for Astronomy and Astrophysics, Shanghai Jiaotong University, Shanghai, 200240, China;
3.Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
4.IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
5.Shanghai Key Lab for Astrophysics, Shanghai Normal University, 100 Guilin Road, 200234, Shanghai, China
6.Department of Astronomy, University of Massachusetts, Amherst, MA 01003-9305, USA
7.Physics Department and Center for Astrophysics, Tsinghua University, Beijing 10084, China
8.Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101, USA
9.Key Laboratory for Computational Astrophysics, Partner Group of the Max Planck Institute for Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China
10.Department of Astronomy & Astrophysics, The University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637, USA
11.Argonne National Laboratory, 9700 South Cass Avenue B109, Lemont, IL 60439, USA
12.Kavli Institute for Cosmological Physics at the University of Chicago, Chicago, IL 60637, USA
13.Department of Astronomy, Peking University, Beijing 100871, China
14.Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA
15.INAF-Osservatorio Astronomico di Napoli, via Moiariello 16, I-80131 Napoli, Italy
16.INAF-Osservatorio Astronomico di Padova, vicolo dell’Osservatorio 5, I-35122 Padova, Italy
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GB/T 7714
Luo,Wentao,Yang,Xiaohu,Zhang,Jun,等. 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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