Subaru Seminars



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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 (Tadayuki Kodama, Kumiko S. Usuda, Naoyuki Tamura, Tomonori Usuda) by email : sseminar_at_subaru.naoj.org (please change"_at_" to @).

November 29, Tuesday, at 11:00 am

" Probing Cosmic Metallicity Evolution with Gravitationally Lensed Galaxies "

Tiantian Yuan

(IfA, Univ of Hawaii)


Heavy element abundance provides a fossil record of galaxy formation and evolution. Metallicity is a crucial parameter to constrain the feedback processes in galaxies such as galactic-scale winds and gas inflows. However, because of the requirement of high S/N spectra, metallicity is a very difficult quantity to obtain at high redshift, especially in the so-called redshift desert of 1 < z < 3. The current best method to obtain metallicity at high redshift is to use strong gravitationally lensed galaxies. In this talk, I will present the first results of our lensing survey into the metallicity properties of star-forming galaxies, based on our MOIRCS/Subaru observations. The powerful magnification of gravitational lensing also allows us to obtain spatially resolved metallicity for a few galaxies at high-z. I will discuss the implications for disk formation scenarios from these spatially resolved galaxies.


Seminars are also held at JAC, CFHT, and IfA.



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