Lorentz Center

International center for scientific workshops

International center for scientific workshops

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## New Directions in Modern Cosmology |

This workshop concentrates on the
discussion of recent cosmological observations which present
challenges to the standard LCDM model. These observations include: the large
scale flows, the sizes and amplitude of galaxy large scale structures, the
systematic effects biasing the analysis of CMB data and the lack of large-angle
correlations, the anisotropy of the Hubble flow, the evolution of galaxy size,
and the failure to find the sub-halo building blocks left over from the
primordial fluctuation spectrum. Last
and not least, it is disturbing that in the LCDM model 95% of the Universe have
not been observed 'directly'. While
each of these observations can be seen as an anomaly that the model would
possibly explain, the bulk of them calls for a more careful analysis of the
model foundations, particularly the amount and role of dark substances. From
the theoretical side it is known that the role of hydrodynamics can be more
important that often assumed. Moreover recently there has been a considerable
theoretical effort to develop a coherent picture in General Relativity which
appropriately takes into account matter inhomogeneities. By
connecting and discussing different approaches and results, this workshop, aims
to advance our comprehension of the large scale universe. Progress can be hoped
for by combining insights from various groups of researchers studying different
observational and theoretical problems. The workshop offers a unique
opportunity to discuss conceptual and methodological problems of the present
cosmological paradigm. Central questions are posed from observational and
theoretical perspectives: - Galaxy
Structures on large scales: How large are galaxy fluctuations on 100 Mpc/h scale? Do we see the predicted
anti-correlations in the two-point correlation function? - Is
there a systematic problem in the CMB large angle correlations? Is there true evidence
for a galaxy-CMB cross correlation? - Are
large scale flows at odds with LCDM predictions? - What
is the role of joint effects of gravity and hydrodynamics in the theory of
structure formation? - What
is the role of large density inhomogeneities in General Relativity? Which effects can be observed? We of course cannot expect to obtain answers to any of
those questions during this workshop but we can discover how expertise from
different fields can be combined to fruitfully address them. The diversity in
the background of the participants guarantees that new questions will arise and
new approaches will be formulated. The central role of the workshop will be to
stimulate and coordinate this interaction. [Back] |