The Subaru Seminar is
usually held in Room 104 of the Hilo Base Facility, adjacent
to the main lobby. Everyone is welcome to attend. If you are
interested in giving a seminar, please contact Subaru seminar organizers
(Tadayuki Kodama, Kumiko S. Usuda, Naoyuki Tamura, Tomonori Usuda)
by email : sseminar_at_subaru.naoj.org (please change"_at" to @).
November 5, Friday, at 11:00 am
" High-resolution Sunyaev-Zel'dovich effect studies of galaxy clusters and beyond "
The Sunyaev-Zel'dovich effect (SZE), the inverse Compton scattering of
CMB photons off hot electrons, provides a unique probe of the
intracluster medium. We show how high angular resolution observations
of the SZE can reveal the thermal structures of galaxy clusters
including the shocks associated with violent mergers. ALMA will be
particularly powerful for this purpose and play complementary roles in
tracing cluster evolution to other facilities including Subaru and
ASTRO-H. We also discuss how the imprint of gas inhomogeneities at
even smaller scales can bias the measurements of cosmological
parameters, such as H_0 from the SZE and X-ray joint analysis.
Apparent agreement of the H_0 value with those derived from other
methods, e.g., CMB, is shown to degrade once recent changes in the
Chandra calibration database are taken into account, suggesting
further the presence of residual systematics. Our results imply both
galaxy clusters themselves and the details of the instruments must be
better understood to enable reliable precision cosmology with clusters.
Seminars are also held at JAC,