Subaru Seminars



This Month






Site Map

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 : (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.

Copyright (c) 1999-2000 Subaru Telescope, NAOJ. All rights reserved.