Cosmological lensing ratios with DES Y1, SPT and Planck
Abstract
Correlations between tracers of the matter density field and gravitational lensing are sensitive to the evolution of the matter power spectrum and the expansion rate across cosmic time. Appropriately defined ratios of such correlation functions, on the other hand, depend only on the angular diameter distances to the tracer objects and to the gravitational lensing source planes. Because of their simple cosmological dependence, such ratios can exploit available signal-to-noise down to small angular scales, even where directly modeling the correlation functions is difficult. We present a measurement of lensing ratios using galaxy position and lensing data from the Dark Energy Survey, and CMB lensing data from the South Pole Telescope and Planck, obtaining the highest precision lensing ratio measurements to date. Relative to the concordance CDM model, we find a best fit lensing ratio amplitude of . We use the ratio measurements to generate cosmological constraints, focusing on the curvature parameter. We demonstrate that photometrically selected galaxies can be used to measure lensing ratios, and argue that future lensing ratio measurements with data from a combination of LSST and Stage-4 CMB experiments can be used to place interesting cosmological constraints, even after considering the systematic uncertainties associated with photometric redshift and galaxy shear estimation.
Keywords
Cite
@article{arxiv.1810.02212,
title = {Cosmological lensing ratios with DES Y1, SPT and Planck},
author = {J. Prat and E. J. Baxter and T. Shin and C. Sánchez and C. Chang and B. Jain and R. Miquel and A. Alarcon and D. Bacon and G. M. Bernstein and R. Cawthon and T. M. Crawford and C. Davis and J. De Vicente and S. Dodelson and T. F. Eifler and O. Friedrich and M. Gatti and D. Gruen and W. G. Hartley and G. P. Holder and B. Hoyle and M. Jarvis and E. Krause and N. MacCrann and B. Mawdsley and A. Nicola and Y. Omori and A. Pujol and M. M. Rau and C. L. Reichardt and S. Samuroff and E. Sheldon and M. A. Troxel and P. Vielzeuf and J. Zuntz and T. M. C. Abbott and F. B. Abdalla and J. Annis and S. Avila and K. Aylor and B. A. Benson and E. Bertin and L. E. Bleem and D. Brooks and D. L. Burke and J. E. Carlstrom and M. Carrasco Kind and J. Carretero and C. L. Chang and H-M. Cho and R. Chown and A. T. Crites and C. E. Cunha and L. N. da Costa and S. Desai and H. T. Diehl and J. P. Dietrich and M. A. Dobbs and P. Doel and W. B. Everett and A. E. Evrard and B. Flaugher and P. Fosalba and J. García-Bellido and E. Gaztanaga and E. M. George and D. W. Gerdes and T. Giannantonio and R. A. Gruendl and J. Gschwend and G. Gutierrez and T. de Haan and N. W. Halverson and N. L. Harrington and W. L. Holzapfel and K. Honscheid and Z. Hou and J. D. Hrubes and D. J. James and T. Jeltema and L. Knox and R. Kron and K. Kuehn and N. Kuropatkin and O. Lahav and A. T. Lee and E. M. Leitch and M. Lima and D. Luong-Van and M. A. G. Maia and A. Manzotti and D. P. Marrone and J. L. Marshall and J. J. McMahon and P. Melchior and F. Menanteau and S. S. Meyer and C. J. Miller and L. M. Mocanu and J. J. Mohr and T. Natoli and S. Padin and A. A. Plazas and C. Pryke and A. K. Romer and A. Roodman and J. E. Ruhl and E. S. Rykoff and E. Sanchez and J. T. Sayre and V. Scarpine and K. K. Schaffer and S. Serrano and I. Sevilla-Noarbe and E. Shirokoff and G. Simard and M. Smith and M. Soares-Santos and F. Sobreira and Z. Staniszewski and A. A. Stark and K. T. Story and E. Suchyta and M. E. C. Swanson and G. Tarle and D. Thomas and K. Vanderlinde and J. D. Vieira and V. Vikram and A. R. Walker and J. Weller and R. Williamson and O. Zahn},
journal= {arXiv preprint arXiv:1810.02212},
year = {2019}
}
Comments
17 pages, 11 figures