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Subaru Seminars are
usually held in Room 104 of the Hilo Base Facility, adjacent
to the main lobby. Everyone is welcome to attend. If you would like to
give a seminar, please contact Subaru seminar organizers
(Thayne Currie, Tae-Soo Pyo, Nagayoshi Ohashi)
by email : sseminar_at_subaru.naoj.org (please change"_at" to @).
July 25, Monday, 11 am in 104
" Constraining the spin of Sgr A* via the motion of the S stars "
Yohsuke Takamori
(Wakayama National College of Technology)
From astrometric and spectroscopic observations in the galactic center,
we can see stars, which are called the S stars, moving around Sgr A*.
The motion of the S stars tell us the mass of Sgr A* and it is about 4 million times
masses of the sun. While we know the mass of the SgrA*, we do not know well
about its spin. In this talk, we assume that the metric around the Sgr A* is the Kerr
metric and constrain the spin parameter including the over-spinning region by the
motion of the S stars.