|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'500'096
Articles rated: 2609
18 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Multi-wavelength scaling relations in galaxy groups: a detailed comparison of GAMA and KiDS observations to BAHAMAS simulations | | Arthur Jakobs
; Massimo Viola
; Ian McCarthy
; Ludovic van Waerbeke
; Henk Hoekstra
; Aaron Robotham
; Gary Hinshaw
; Alireza Hojjati
; Hideki Tanimura
; Tilman Tröster
; Ivan Baldry
; Catherine Heymans
; Hendrik Hildebrandt
; Konrad Kuijken
; Peder Norberg
; Joop Schaye
; Cristóbal Sifon
; Edo van Uitert
; Edwin Valentijn
; Gijs Verdoes Kleijn
; Lingyu Wang
; | | Date: |
14 Dec 2017 | | Abstract: | We study the scaling relations between the baryonic content and total mass of
groups of galaxies, as these systems provide a unique way to examine the role
of non-gravitational processes in structure formation. Using Planck and ROSAT
data, we conduct detailed comparisons of the stacked thermal Sunyaev-Zel’dovich
(tSZ) effect and X-ray scaling relations of galaxy groups found in the the
Galaxy And Mass Assembly (GAMA) survey and the BAHAMAS hydrodynamical
simulation. We use weak gravitational lensing data from the Kilo Degree Survey
(KiDS) to determine the average halo mass of the studied systems. We analyse
the simulation in the same way, using realistic weak lensing, X-ray, and tSZ
synthetic observations. Furthermore, to keep selection biases under control, we
employ exactly the same galaxy selection and group identification procedures to
the observations and simulation. Applying this careful comparison, we find that
the simulations are in agreement with the observations, particularly with
regards to the scaling relations of the lensing and tSZ results. This finding
demonstrates that hydrodynamical simulation have reached the level of realism
that is required to interpret observational survey data and study the baryon
physics within dark matter haloes, where analytical modelling is challenging.
Finally, using simulated data, we demonstrate that our observational processing
of the X-ray and tSZ signals is free of significant biases. We find that our
optical group selection procedure has, however, some room for improvement. | | Source: | arXiv, 1712.5463 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER