Fitting the nonlinear matter bispectrum by the Halofit approach
| العنوان: | Fitting the nonlinear matter bispectrum by the Halofit approach |
|---|---|
| المؤلفون: | Atsushi Taruya, Masato Shirasaki, Issha Kayo, Yosuke Kobayashi, Toshiya Namikawa, Takahiro Nishimichi, Ryuichi Takahashi, Ken Osato |
| المساهمون: | Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Astrophys.J. Astrophys.J., 2020, 895 (2), pp.113. ⟨10.3847/1538-4357/ab908d⟩ |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cold dark matter, 010504 meteorology & atmospheric sciences, Cosmic microwave background, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, General Relativity and Quantum Cosmology, symbols.namesake, 0103 physical sciences, Sample variance, Planck, 010303 astronomy & astrophysics, Weak gravitational lensing, 0105 earth and related environmental sciences, Mathematical physics, Physics, Astronomy and Astrophysics, Redshift, Cover (topology), Space and Planetary Science, [PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc], symbols, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Bispectrum, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We provide a new fitting formula of the matter bispectrum in the nonlinear regime calibrated by high-resolution cosmological $N$-body simulations of $41$ cold dark matter ($w$CDM, $w=$ constant) models around the Planck 2015 best-fit parameters. As the parameterization in our fitting function is similar to that in Halofit, our fitting is named BiHalofit. The simulation volume is sufficiently large ($> 10 \, {\rm Gpc}^3$) to cover almost all measurable triangle bispectrum configurations in the universe. The function is also calibrated using one-loop perturbation theory at large scales ($k 23 pages, 15 figures; accepted for publication in ApJ; typos corrected; numerical codes of the fitting formula are available at https://toshiyan.github.io/clpdoc/html/basic/basic.html#module-basic.bispec (Python) and http://cosmo.phys.hirosaki-u.ac.jp/takahasi/codes_e.htm (C and Fortran) |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::298fcebb032f8173caa8325ec982f4f0 http://arxiv.org/abs/1911.07886 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....298fcebb032f8173caa8325ec982f4f0 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |