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 @).
April 17, Tuesday at 11:00 am
" AEGIS: A New Picture of Star Formation in Field Galaxies since z~1 "
(Lick Observatory / UC Santa Cruz)
The "All Wavelength Extended Groth Strip Survey" (AEGIS) survey has
recently provided a first comprehensive picture of star formation in
field galaxies out to z>1.
(1) Our data showed that star formation histories are a strong function of
(2) Star formation evolved predominantly gradually declining,
not through an evoloving role of starbursts.
(3) The observed mass
dependencies of star formation histories imply not only a slower decline,
but also a systematically later onset, of star formation in less massive
galaxies. These mass dependencies jointly generate the observed
I present a quantitative model that parametrizes the evolution of
star formation as a function of mass and redshift. This picture of
"normal" star formation provides a testbed for current theoretical
concepts of star formation and baryon physics and, for the first time,
a baseline against which we can measure the effect of additional
processes, quenching or mergers, as a function of mass and z.
For more information on this work, please see:
Seminars are also held at JAC,