Looking for a twist: probing the cosmological gravitomagnetic effect via weak lensing-kSZ cross correlations
| العنوان: | Looking for a twist: probing the cosmological gravitomagnetic effect via weak lensing-kSZ cross correlations |
|---|---|
| المؤلفون: | Cristian Barrera-Hinojosa, Baojiu Li, Yan-Chuan Cai |
| المصدر: | Monthly Notices of Royal Astronomical Society, 2022, Vol.510(3), pp.3589-3604 [Peer Reviewed Journal] Barrera-Hinojosa, C, Li, B & Cai, Y-C 2022, ' Looking for a twist: probing the cosmological gravitomagnetic effect via weak lensing-kSZ cross correlations ', Monthly Notices of the Royal Astronomical Society, vol. 510, no. 3, pp. 3589-3604 . https://doi.org/10.1093/mnras/stab3657 |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | numerical [Methods], Cosmology and Nongalactic Astrophysics (astro-ph.CO), Large-scale structure of Universe, 010308 nuclear & particles physics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Cosmic background radiation, 01 natural sciences, 13. Climate action, Space and Planetary Science, 0103 physical sciences, Physics::Space Physics, weak [Gravitational lensing], 010303 astronomy & astrophysics, Gravitation, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | General relativity predicts that the rotational momentum flux of matter twists the spacetime via a vector gravitomagnetic (frame-dragging) field, which remains undetected in cosmology. This vector field induces an additional gravitational lensing effect; at the same time, the momentum field sources the kinetic Sunyaev-Zel'dovich (kSZ) effect. The common origin of these two effects allows us to probe the gravitomagnetic signal via their cross-correlations. In this paper, we explore the possibility of detecting the gravitomagnetic field in $\Lambda$CDM by cross-correlating the weak-lensing convergence field with the CMB temperature map, which is imprinted with the kSZ signal. This approach allows us to extract the gravitomagnetic effect because the cross correlation between the standard Newtonian contribution to the weak-lensing convergence field, $\kappa_\Phi$, and the kSZ effect is expected to vanish. We study the cross correlations with a suite of large-volume Newtonian $N$-body simulations and a small-volume, high-resolution, general-relativistic counterpart. We show that insufficient simulation resolution can introduce significant spurious correlations between $\kappa_\Phi$ and kSZ. From the high-resolution simulation, we find that the cumulative signal-to-noise ratio (SNR) of the kSZ-gravitomagnetic convergence field can reach almost 15 (30) at $\ell\simeq5000$ ($10^4$) for the lensing source redshift $z_s=0.83$, if only cosmic variance is considered. We make forecast for next-generation lensing surveys such as Euclid and LSST, and CMB experiments such as Simons Observatory and CMB-S4, and find that, for $z_s=1.4$, the cumulative SNR can exceed 5 (9) at $\ell\simeq5000$ ($10^4$), indicating that the cosmological gravitomagnetic effect can be detected, if several foreground contaminations can be removed. Comment: Minor corrections (typos, references, ...). Matches accepted version |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1410285c2337679fdaaff8447954e39 http://arxiv.org/abs/2109.02632 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....c1410285c2337679fdaaff8447954e39 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |