First constraints from marked angular power spectra with Subaru Hyper Suprime-Cam Survey First-Year Data

Monthly Notices of the Royal Astronomical Society, vol. 546

Abstract

ABSTRACT We present the first application of marked power spectra to weak lensing data, using maps from the Subaru Hyper Suprime-Cam Year 1 (HSC-Y1) survey. Marked convergence fields, constructed by weighting the convergence field with non-linear functions of its smoothed version, are designed to encode higher-order information while remaining computationally tractable. Using simulations tailored to the HSC-Y1 data, we test three mark functions that up- or down-weight different density environments. Our results show that combining multiple types of marked auto and cross-spectra improves constraints on the clustering amplitude parameter $S_8\equiv \sigma _8\sqrt{\Omega _{\rm m}/0.3}$ by $\approx$43 per cent compared to standard two-point power spectra. When applied to the HSC-Y1 data, this translates into a constraint on $S_8 = 0.807\pm 0.024$. We assess the sensitivity of the marked power spectra to systematics, including baryonic effects, intrinsic alignment, photometric redshifts, and multiplicative shear bias. We note that some of the additional information introduced by the marked field originates from scales smaller than the scale cut, and is partly Gaussian in nature. This does not invalidate our systematic tests. These results demonstrate the promise of marked statistics as a practical and powerful tool for extracting non-Gaussian information from weak lensing surveys.

Authors 10

1. Jessica Cowell corresponding

   Kavli Institute for the Physics and Mathematics of the Universe · University of Oxford · The University of Tokyo

   Affiliation as printed

   Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583 ,

   Kavli IPMU (WPI), UTIAS, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 ,

   University of Oxford Department of Physics, , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH ,

2. Joaquín Armijo

   Kavli Institute for the Physics and Mathematics of the Universe · The University of Tokyo

   Affiliation as printed

   Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583 ,

   Kavli IPMU (WPI), UTIAS, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 ,

3. Leander Thiele

   Kavli Institute for the Physics and Mathematics of the Universe · The University of Tokyo

   Affiliation as printed

   Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583 ,

   Kavli IPMU (WPI), UTIAS, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 ,

4. Gabriela A. Marques

   Fermi National Accelerator Laboratory · University of Chicago · Centro Brasileiro de Pesquisas Físicas

   Affiliation as printed

   Centro Brasileiro de Pesquisas Físicas , R. Dr. Xavier Sigaud, 150 - Botafogo, Rio de Janeiro, RJ 22290-180 ,

   Fermi National Accelerator Laboratory , P. O. Box 500, Batavia, IL 60510 ,

   Kavli Institute for Cosmological Physics, University of Chicago , Chicago, IL 60637 ,

5. Camila P. Novaes

   Instituto Nacional de Pesquisas Espaciais

   Affiliation as printed

   Divisão de Astrofísica, Instituto Nacional de Pesquisas Espaciais , Av. dos Astronautas 1758, Jardim da Granja, São José dos Campos, SP ,

6. Daniela Grandón Aachen Mathematical Institute

   Leiden University · University of Valparaíso

   Affiliation as printed

   Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso , Avenida Gran Bretaña 1111, Valparaíso ,

   Mathematical Institute, Leiden University , Gorleaus Building, Einsteinweg 55, NL-2333 CA Leiden ,

7. Sihao Cheng

   Perimeter Institute · Institute for Advanced Study

   Affiliation as printed

   Institute for Advanced Study , 1 Einstein Dr., Princeton, NJ 08540 ,

   Perimeter Institute for Theoretical Physics , 31 Caroline St N, Waterloo, ON N2L 2Y5 ,

8. Masato Shirasaki

   National Institutes of Natural Sciences · The Institute of Statistical Mathematics · National Astronomical Observatory of Japan

   Affiliation as printed

   National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences , Osawa, Mitaka, Tokyo 181-8588 ,

   The Institute of Statistical Mathematics , Tachikawa, Tokyo 190-8562 ,

9. David Alonso

   University of Oxford

   Affiliation as printed

   University of Oxford Department of Physics, , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH ,

10. Jia Liu

    Kavli Institute for the Physics and Mathematics of the Universe · The University of Tokyo

    Affiliation as printed

    Center for Data-Driven Discovery, Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583 ,

    Kavli IPMU (WPI), UTIAS, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583 ,