Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
Dark energy survey year 3 results: High-precision measurement and modeling of galaxy-galaxy lensing
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暗能量调查第三年结果:星系-星系透镜效应的高精度测量和建模
DOI:
10.1103/physrevd.105.083528
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发表时间:
2022
影响因子:
5
通讯作者:
Amon, A.
中科院分区:
文献类型:
--
作者:
Prat, J.;Blazek, J.;Sánchez, C.;Tutusaus, I.;Pandey, S.;Elvin-Poole, J.;Krause, E.;Troxel, M. A.;Secco, L. F.;Amon, A.
We present and characterize the galaxy-galaxy lensing signal measured using the first three years of data from the Dark Energy Survey (DES Y3) covering. These galaxy-galaxy measurements are used in the DES Y3cosmological analysis, which combines weak lensing and galaxy clustering information. We use two lens samples: a magnitude-limited sample and the redmagicsample, which span the redshift rangewith 10.7 and 2.6 M galaxies, respectively. For the source catalog, we use themetacalibrationshape sample, consisting ofgalaxies separated into four tomographic bins. Our galaxy-galaxy lensing estimator is the mean tangential shear, for which we obtain a total SNR offormaglim (for redmagic), and() after applying the scale cuts of. Thus we reach percent-level statistical precision, which requires that our modeling and systematic-error control be of comparable accuracy. The tangential shear model used in thecosmological analysis includes lens magnification, a five-parameter intrinsic alignment model, marginalization over a point mass to remove information from small scales and a linear galaxy bias model validated with higher-order terms. We explore the impact of these choices on the tangential shear observable and study the significance of effects not included in our model, such as reduced shear, source magnification, and source clustering. We also test the robustness of our measurements to various observational and systematics effects, such as the impact of observing conditions, lens-source clustering, random-point subtraction, scale-dependentmetacalibrationresponses, point spread function residuals, and B modes.
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影响因子:
4.8
作者:
Chihway L. Chang;B. Jain
通讯作者:
B. Jain
影响因子:
4.8
作者:
M. Jarvis;G. Bernstein;A. Amon;C. Davis;P. L'eget;K. Bechtol;I. Harrison;M. Gatti;A. Roodman
通讯作者:
M. Jarvis;G. Bernstein;A. Amon;C. Davis;P. L'eget;K. Bechtol;I. Harrison;M. Gatti;A. Roodman
影响因子:
6.4
作者:
X. Fang;E. Krause;T. Eifler;N. MacCrann
通讯作者:
X. Fang;E. Krause;T. Eifler;N. MacCrann
影响因子:
6.4
作者:
X. Fang;J. Blazek;J. McEwen;C. Hirata
通讯作者:
C. Hirata
影响因子:
6.5
作者:
Hartlap, J.;Simon, P.;Schneider, P.
通讯作者:
Schneider, P.