Ray-tracing log-normal simulation for weak gravitational lensing: application to the cross-correlation with galaxies
| العنوان: | Ray-tracing log-normal simulation for weak gravitational lensing: application to the cross-correlation with galaxies |
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| المؤلفون: | Ryu Makiya, Eiichiro Komatsu, Issha Kayo |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), COSMIC cancer database, Cross-correlation, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, Galaxy, Redshift, Astrophysics of Galaxies (astro-ph.GA), Log-normal distribution, Ray tracing (graphics), Spectrograph, Weak gravitational lensing, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We present an algorithm to self-consistently generate mock weak gravitational lensing convergence fields and galaxy distributions in redshift space. We generate three-dimensional cosmic density fields that follow a log-normal distribution, and ray-trace them to produce convergence maps. As we generate the galaxy distribution from the same density fields in a manner consistent with ray-tracing, the galaxy-convergence cross-power spectrum measured from the mock agrees with the theoretical expectation with high precision. We use this simulation to forecast the quality of galaxy-shear cross-correlation measurements from the Subaru Hyper Suprime-Cam (HSC) and Prime Focus Spectrograph (PFS) surveys. We find that the nominal HSC and PFS surveys would detect the cross power spectra with signal-to-noise ratios of 20 and 5 at the lowest ($z = 0.7$) and highest ($z = 2.2$) redshift bins, respectively. 22 pages, 10 figures, accepted to JCAP. The simulation code is available at https://wwwmpa.mpa-garching.mpg.de/~komatsu/codes.html |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d85366981decbd4b39fefd5f73da7352 https://iopscience.iop.org/article/10.1088/1475-7516/2021/03/095 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....d85366981decbd4b39fefd5f73da7352 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |