黑暗能源调查3年结果：三点剪切相关和质量孔径力矩

论文标题

黑暗能源调查3年结果：三点剪切相关和质量孔径力矩

Dark Energy Survey Year 3 Results: Three-Point Shear Correlations and Mass Aperture Moments

论文作者

Secco, L. F., Jarvis, M., Jain, B., Chang, C., Gatti, M., Frieman, J., Adhikari, S., Alarcon, A., Amon, A., Bechtol, K., Becker, M. R., Bernstein, G. M., Blazek, J., Campos, A., Rosell, A. Carnero, Kind, M. Carrasco, Choi, A., Cordero, J., DeRose, J., Dodelson, S., Doux, C., Drlica-Wagner, A., Everett, S., Giannini, G., Gruen, D., Gruendl, R. A., Harrison, I., Hartley, W. G., Herner, K., Krause, E., MacCrann, N., McCullough, J., Myles, J., Navarro-Alsina, A., Prat, J., Rollins, R. P., Samuroff, S., Sanchez, C., Sevilla-Noarbe, I., Sheldon, E., Troxel, M. A., Zeurcher, D., Aguena, M., Andrade-Oliveira, F., Annis, J., Bacon, D., Bertin, E., Bocquet, S., Brooks, D., Burke, D. L., Carretero, J., Castander, F. J., Crocce, M., da Costa, L. N., Pereira, M. E. S., De Vicente, J., Diehl, H. T., Doel, P., Eckert, K., Ferrero, I., Flaugher, B., Friedel, D., Garcia-Bellido, J., Gutierrez, G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Huterer, D., Kuehn, K., Kuropatkin, N., Maia, M. A. G., Marshall, J. L., Menanteau, F., Miquel, R., Mohr, J. J., Morgan, R., Muir, J., Paz-Chinchon, F., Pieres, A., Malagon, A. A. Plazas, Rodriguez-Monroy, M., Roodman, A., Sanchez, E., Serrano, S., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., To, C., Weller, J.

论文摘要

我们使用深色能量调查的前三年数据介绍了三点剪切相关性的高信噪测量以及质量孔径统计量的第三刻。另外，我们还获得了携带宇宙学信息的四个三分剪切相关的配置和尺度依赖性的第一个测量。使用三阶质量孔径统计量，我们在4至60个弧形的角度尺度上提出了层析成像测量值，统计显着性为15.0 $σ$。使用层析成像信息并测量二阶质量孔径，我们还获得了偏移参数及其红移的演变。我们发现，这些剪切3PT函数的幅度和比例依赖性与基于N体模拟的模拟星系目录中的测量符合定性一致，这表明将其包括在未来的宇宙学分析中。我们通过表明B模型，平等侵略的贡献和PSF建模不确定性可以验证我们的测量值可以忽略不计，并确定测得的信号可能是天体物理和引力的起源。

We present high signal-to-noise measurements of three-point shear correlations and the third moment of the mass aperture statistic using the first 3 years of data from the Dark Energy Survey. We additionally obtain the first measurements of the configuration and scale dependence of the four three-point shear correlations which carry cosmological information. With the third-order mass aperture statistic, we present tomographic measurements over angular scales of 4 to 60 arcminutes with a combined statistical significance of 15.0$σ$. Using the tomographic information and measuring also the second-order mass aperture, we additionally obtain a skewness parameter and its redshift evolution. We find that the amplitudes and scale-dependence of these shear 3pt functions are in qualitative agreement with measurements in a mock galaxy catalog based on N-body simulations, indicating promise for including them in future cosmological analyses. We validate our measurements by showing that B-modes, parity-violating contributions and PSF modeling uncertainties are negligible, and determine that the measured signals are likely to be of astrophysical and gravitational origin.

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