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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, Masahiko Hayashi, Masayuki Akiyama) by email.

March 20, Monday at 11:00am

" The evolution of galaxies from primeval irregulars to present-day ellipticals "

Masao Mori

(UCLA/Sensyu Univ.)


The current understanding of galaxy formation is that it proceeds in a 'bottom up' way, with the formation of small clumps of gas and stars that merge hierarchically until giant galaxies are built up. The baryonic gas loses the thermal energy by radiative cooling and falls towards the centres of the new galaxies, while supernovae blow gas out. Any realistic model therefore requires a proper treatment of these processes, but hitherto this has been far from satisfactory. Here I report an ultra-high-resolution simulation that follows evolution from the earliest stages of galaxy formation through the period of dynamical relaxation. The bubble structures of gas revealed in our simulation(< 10^8 years) resemble closely the high-redshift Lyman alpha emitters. After 10^9 years these bodies are dominated by stellar continuum radiation and look like the Lyman break galaxies known as the high-redshift star-forming galaxies at which point the abundance of heavy elements appears to be solar. After 1.10^10 years, these galaxies resemble present-day ellipticals.


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



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