KEK Cosmophysics Workshop LLTB2009
Theory Center, Institute of Particle and Nuclear Studies
High Energy Accelerator Organization (KEK),
Tsukuba Campus 4th-Bld 1F Seminar Hall
Oct. 20 - 23, 2009
Recently, in connection with the dark energy problem and the CMB anomaly
problems, observational cosmology in the background with large local inhomogeneities
such as voids and clusters as a prior is becoming a major research area.
Although it is unlikely that the present apparent accelerated expansion
is fully accounted for by a local deep void in which we live around the
centre, some authors suggest that there may exist a shallow local void
responsible for some fraction of the observed acceleration. Further, it
is also pointed out that the CMB anomaly is strongly correlated with foreground
voids and clusters. In such situations, theoretical implications of the
observations of CMB, galaxy clusterings, BAO and weak gravitational lensing
on the nature of dark energy and the early universe including inflation
may be different from those obtained by the simple ©-CDM model.
The main purpose of this workshop is to provide the opportunity for experts in this field to discuss how to push investigations further and start new collaborations on these problems, in particular, the effects of inhomogeneities of the present universe on the observational cosmology and their influence on the dark energy probe and the inflation probe projects. Taking into account the fact that most work on these problems has been based on the analyses of the Lemaitre-Tolman-Bondi spacetime, we mainly focus on the LTB cosmology or its extension with non-vanishing cosmological constant, the ©-LTB cosmology, although talks and discussions related to the above problems from wider perspectives are welcome.
STYLE OF THE WORKSHOP
Because of the nature of the workshop, group or personal free discussions are going to be given as much time as possible. Further, participants can stay at the Theory Centre after the workshop to collaborate with other participants of the workshop and people of the Theory Centre. The domestic travel and local expenses to attend the workshop and for the additional stay will be provided by the Theory Centre in principle.
INVITED SPEAKER /PARTICIPANTS
Istvan Szapudi (Inst. Aston., U Hawaii)
Valerio Marra (Dept. Phys., U Jyvaskyla)
Timothy Clifton (Dept. Astron., Oxford U)
Shinji Tsujikawa (Dept. Phys., Tokyo U. Sci.)
Michael Blomqvist (Dept. Astron., Stockholm U.)
Naoki Itoh (Dept. Phys., Sofia U.)
K. Inoue (Kinki U.), A. Ishibashi (KEK),
M. Kasai ( Hirosaki U. ), H. Kodama (KEK, chair),
K. Nakao (Osaka City U. ), N. Sakai (Yamagata U.),
K. Tomita (Professor Emeritus of Kyoto U.),
J. Yokoyama (RESCEU, U. Tokyo)
Hideo Kodama (Chair), Akihiro Ishibashi, Shinya Tomizawa, Hajime Goto
Secretary: Ms. Tamao Shishido
Address: Theory Division, IPNS, KEK, 1-1 Oho, Tsukuba 305-0501, Japan
EHayama Center for Advanced Studies, the Graduate University for Advanced
EMEXT Grant-in-Aid for Scientific Research on Innovative Area 2110
"The Physical Origin of the Universe"Research Group A05 (No.21111006) .
ETheory Center, KEK.