Objective
The standard theory of structure formation and evolution via accretion and hierarchical merging of cold dark matter-dominated halos (CDM) is able to explain most of the present observations of the Universe on large scales. However, recent analyses of structure on galactic and subgalactic scales show discrepancies with observations.
Using N-body/SPH cosmological simulations this project will address one of the most severe challenges faced by current models of galaxy formation: the missing satellite question. In particular, numerical simulations of CDM predict over an order of magnitude more subhalos around Milky Way-like galaxies than the number of dwarf galaxies observed around the Milky Way.
This inconsistency persists in overluminous elliptical galaxies (o r fossil groups) that have masses up to 40% of the nearby galaxy cluster Virgo. Fossil groups are missing ~500 satellites with luminosities that occur at the predicted frequency in the Virgo cluster. Moreover, the 'missing galaxies' in fossil groups are as luminous as the Milky Way with a velocity dispersion ~150 km/s.
These mass scales of the missing galaxies are so high that it is much more difficult to invoke gas processes to cause them to disappear. Combining unique data spectroscopy inferred from ESO telescopes for a sample of fossil groups with high-resolution simulations for groups with similar masses will test how pervasive the missing satellite question is on the scale of groups and small clusters.
The research project will address the nature of the transition from objects with a weak substructure function like Milky Way or fossil groups to the abundant substructure of galaxy clusters. It will try to answer to the question whether these systems have properties more similar to galactic systems or to mini-clusters systems. Finally it will assess whether this feature is a result of feedback processes occurred at high redshift.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology mechanical engineering vehicle engineering aerospace engineering satellite technology
- natural sciences physical sciences astronomy physical cosmology galaxy evolution
- natural sciences physical sciences optics spectroscopy
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
FP6-2005-MOBILITY-5
See other projects for this call
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
ZURICH
Switzerland
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.