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, Nagayoshi Ohashi, Tomonori Usuda) by email : sseminar_at_subaru.naoj.org (please change"_at_" to @).

Jan 25, Friday, at 11:00 am

" Star formation and molecular gas in the distant Universe in the 2 SF-mode framework "

Emanuele Daddi

(CEA, France)


We have used observations from the Herschel space observatory and the IRAM Plateau de Bure interferometry to characterize the evolving properties of star forming galaxies up to a redshift of about 2, including their star formation rates and gas content (hence star formation efficiencies). The most interesting outcome is that their evolution can be quite well described with a simplified empirical framework where stellar mass is the primary physical parameter, with the differentiation between disk like growth and merging triggered star formation is a first order correction. In this 2SF-mode framework we can account for the IR luminosity function and multi-frequency galaxy counts, the cosmic evolution of dust temperatures, and the luminosity of the AGNs they contain. Ultimately, it appears that the availibility of gas reservoirs is the most important ingredient regulating the cosmic growth of galaxies and of their supermassive black holes.


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



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