|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
19 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Imprints of mass accretion on properties of galaxy clusters | | Andreas Faltenbacher
; Brandon Allgood
; Stefan Gottloeber
; Gustavo Yepes
; Yehuda Hoffman
; | | Date: |
21 Dec 2004 | | Journal: | Mon.Not.Roy.Astron.Soc. 362 (2005) 1099-1108 | | Subject: | astro-ph | | Affiliation: | 1,4), Brandon Allgood , Stefan Gottloeber , Gustavo Yepes , Yehuda Hoffman ( UC Santa Cruz, AIP Potsdam, UA Madrid, HU Jerusalem | | Abstract: | We use a large scale N-body simulation of the flat LCDM universe, including adiabatic gas dynamics (GADGET), to investigate the impact of mass accretion modes of galaxy clusters on the vector quantities, orientation and angular momentum. Our cluster sample comprises the 3000 most massive friends-of-friends halos found in the 500 Mpc/h simulation box. We use the mass ratios of the two most massive progenitors at z=0.5 m_2/m_1 (m_1 < m_2) to construct two accretion mode sub-samples, a recent major merger sample and a steady accretion mode sample. We find that the mass of current clusters in the merger sample is on average ~43% larger than the mass of the two progenitors (m_1 + m_2), whereas in the steady accretion mode sample a smaller increase of ~25% is found. We show that the separation vector connecting the two most massive progenitor halos at z=0.5 is strongly correlated with the orientation of the current cluster. We also find that the current angular momentum in the recent major merger sample tends to be parallel to orbital angular momentum of the progenitors, whereas the angular momentum of the steady accretion mode sample is mainly determined by the angular momentum of the most massive progenitor. Finally we confirm the long range of correlations for the major and the minor principal axes (up to 100 Mpc/h) and angular momentum (up to 20 Mpc/h) for the dark matter as well as the gaseous component of galaxy clusters. A separate analysis of the two sub-samples indicates that the long range correlations are independent of the mass accretion mode. | | Source: | arXiv, astro-ph/0501452 | | 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 Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER