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Emergent Gravity Fails to Explain Color-dependent Galaxy-Galaxy Lensing Signal from SDSS DR7

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Title
Emergent Gravity Fails to Explain Color-dependent Galaxy-Galaxy Lensing Signal from SDSS DR7
Author(s)
Wentao Luo; Jiajun Zhang; Vitali Halenka; Xiaohu Yang; Surhud More; Christopher J. Miller; Lei Liu; Feng Shi
Publication Date
2021-06
Journal
Astrophysical Journal, v.914, no.2
Publisher
IOP Publishing Ltd
Abstract
© 2021. The American Astronomical Society. All rights reserved.We test Verlinde's Emergent Gravity (EG) theory using a galaxy-galaxy lensing technique based on Sloan Digital Sky Survey DR7 data. In the EG scenario, we do not expect a color dependence of the galaxy sample in the apparent dark matter predicted by EG, which is exerted only by the baryonic mass. If the baryonic mass is similar, then the predicted lensing profiles from the baryonic mass should be similar according to EG, regardless of the color of the galaxy sample. We use the stellar mass of the galaxy as a proxy of its baryonic mass. We divide our galaxy sample into five stellar mass bins, and further classify them as red and blue subsamples in each stellar mass bin. If we set the halo mass and concentration as free parameters, ΛCDM is favored by our data in terms of the reduced χ 2, while EG fails to explain the color dependence of the excess surface density from the galaxy-galaxy lensing measurement.
URI
https://pr.ibs.re.kr/handle/8788114/10044
DOI
10.3847/1538-4357/abf4c2
ISSN
0004-637X
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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