Galaxy and Mass Assembly (GAMA): Probing galaxy-group correlations in redshift space with the halo streaming model
| العنوان: | Galaxy and Mass Assembly (GAMA): Probing galaxy-group correlations in redshift space with the halo streaming model |
|---|---|
| المؤلفون: | Qianjun Hang, John A Peacock, Shadab Alam, Yan-Chuan Cai, Katarina Kraljic, Marcel van Daalen, M Bilicki, B W Holwerda, J Loveday |
| المساهمون: | Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), HEP, INSPIRE |
| المصدر: | Hang, Q, Peacock, J A, Alam, S, Cai, Y-C, Kraljic, K, Daalen, M V, Bilicki, M, Holwerda, B W & Loveday, J 2022, ' Galaxy and Mass Assembly (GAMA): Probing galaxy-group correlations in redshift space with the halo streaming model ', Monthly Notices of the Royal Astronomical Society, vol. 517, no. 1, pp. 374-392 . https://doi.org/10.1093/mnras/stac2569 Mon.Not.Roy.Astron.Soc. Mon.Not.Roy.Astron.Soc., 2022, 517 (1), pp.374-392. ⟨10.1093/mnras/stac2569⟩ Monthly Notices of the Royal Astronomical Society, 517(1), 374-392 |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics - cosmology and nongalactic astrophysics, FOS: Physical sciences, Large-scale structure of universe, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Space and Planetary Science, galaxies: groups: general, astro-ph.CO, [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Galaxies - groups - general, Astrophysics::Galaxy Astrophysics, Gravitation |
| الوصف: | We have studied the galaxy-group cross-correlations in redshift space for the Galaxy And Mass Assembly (GAMA) Survey. We use a set of mock GAMA galaxy and group catalogues to develop and test a novel 'halo streaming' model for redshift-space distortions. This treats 2-halo correlations via the streaming model, plus an empirical 1-halo term derived from the mocks, allowing accurate modelling into the nonlinear regime. In order to probe the robustness of the growth rate inferred from redshift-space distortions, we divide galaxies by colour, and divide groups according to their total stellar mass, calibrated to total mass via gravitational lensing. We fit our model to correlation data, to obtain estimates of the perturbation growth rate, $f\sigma_8$, validating parameter errors via the dispersion between different mock realizations. In both mocks and real data, we demonstrate that the results are closely consistent between different subsets of the group and galaxy populations, considering the use of correlation data down to some minimum projected radius, $r_{\rm min}$. For the mock data, we can use the halo streaming model to below $r_{\rm min} = 5h^{-1}$ Mpc, finding that all subsets yield growth rates within about 3% of each other, and consistent with the true value. For the actual GAMA data, the results are limited by cosmic variance: $f\sigma_8=0.29\pm 0.10$ at an effective redshift of 0.20; but there is every reason to expect that this method will yield precise constraints from larger datasets of the same type, such as the DESI bright galaxy survey. Comment: 17 pages, 12 figures. Matched to the accepted version |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3826f4d4f22acc3607c89be5b55af10 https://hdl.handle.net/20.500.11820/aa56be3b-5d78-4974-8b2f-2a15ce8c60ba |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....e3826f4d4f22acc3607c89be5b55af10 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |