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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
(Tomonori Usuda, Kumiko S. Usuda, Masayuki Akiyama)
by email : sseminar_at_subaru.naoj.org (please change"_at" to @).
March 14, Friday at 11:00 am
" Spectroscopic study of galaxies within the structure around Cl 0939+4713 "
Fumiaki Nakata (NAOJ)
We present a discovery of large-scale structures around Cl 0939+4713
at z=0.4 based on spectroscopic redshifts. In our previous papers,
we suggested that there are filaments and subclumps around the cluster
core using the photometric redshfit technique. A spectroscopic follow-up
observation with the Subaru/FOCAS was carried out on eight selected regions
covering the most prominent structures to confirm their association to
the main cluster. We confirm that 96 galaxies are cluster members, which
form large-scale structures around the cluster core: eg., a large subclump
to the west and filaments to the south and northwest.
We also discuss stellar populations of galaxies in the structures.